ISIS SONAR® User’s Manual, Volume 1 Software documentation through v6.
Copyright Notice This software is copyrighted and licensed for use on one computer per copy. Triton Elics International grants permission to the purchaser to make a limited number of copies of the program for backup purposes. Additional reproduction of the programs or this manual is a violation of the copyright law. The licensee is bound by the terms and conditions set forth in the Software License Agreement and Limited Warranty that accompanies this document.
Safety Precautions Please adhere to the hardware and software precautions mentioned below. In addition, observe all safety precautions mentioned in this manual. When working with the overall system 1. Before handling components inside your computer system, exit all applications and shut down the operating system in accordance with procedures applicable to them. 2. Turn off the power to the computer and disconnect all cables that may be feeding electrical power to the system you will be working on. 3.
SOFTWARE LICENSE AGREEMENT YOU MAY NOT: By opening this package, you agree to be bound by the terms of this Agreement, which include the software license and the limited warranty. This Agreement applies to you and any subsequent licensee of this software program. If you do not accept or agree to the terms of this Agreement, do not open this sealed package. Promptly return the unopened package to TRITON ELICS for a refund.
LIMITED WARRANTY TRITON ELICS warrants that (a) the SOFTWARE will perform substantially in accordance with the accompanying written materials for a period of one (1) year from the date of shipment and (b) any hardware accompanying the SOFTWARE will be free from defects in materials and workmanship under normal use and service for a period of one (1) year from date of shipment. CUSTOMER REMEDIES.
Preface: Using This Manual This book is the first part of a two-part set from Triton Elics International, Inc.: Isis User’s Manual, Volume 1. It contains most of the most frequently accessed functions and information relevant to the software. The second book, Isis User’s Manual, Volume 2, contains everything else about Isis, such as file format structure, navigation templates, and other less frequently accessed information.
Skills You’ll Need to Know Before Using Isis To use Isis, you should know basic Windows concepts, such as working with icons on the Windows desktop. You can find this information in the Microsoft online Help system built into the Windows systems. If You Choose Not to Read the Whole Book For basic instructions on setting up Isis hardware and software, refer to 'Setting up Isis Hardware Default' and to 'Getting Started with Isis,’ both in Chapter 2, Volume 1, for information on those topics.
June 2004 Isis® Sonar User's Manual, Volume 1 Chapter 1 Isis Overview 1.1 Introduction to Isis 1.2 Theory of Isis Operation 1.2.1 Background 1.2.2 Data Acquisition 1.2.3 Real-Time Data Processing 1.2.4 Combining Navigational and Acoustical Data 1.2.5 Choice of Data Storage Formats and Media 1.2.6 Hardcopy Records 1 1 3 3 4 5 5 6 6 Chapter 2 Getting Started with Isis Software 2.1 Software Installation Notes 2.2 Upgrading to a Newer Software Version 2.3 Solutions to Some Common Problems 2.
June 2004 Isis® Sonar User's Manual, Volume 1 3.6 ISIS EXPLORER ............................................................................................................... 46 3.6.1 Isis Explorer Menus................................................................................................ 47 3.6.1.1 Isis Explorer File Menu .................................................................................................. 47 3.6.1.2 Isis Explorer View Menu..........................................
June 2004 Isis® Sonar User's Manual, Volume 1 5.2 SETTING UP A PLOTTER ................................................................................................. 79 5.3 PRINTING TO A WINDOWS DEVICE ................................................................................ 81 5.4 ACTIVATING SOME PRINTER DRIVERS FOR ISIS ............................................................. 82 5.5 SPECIAL SETTINGS FOR SOME ISIS PLOTTERS ................................................................
June 2004 Isis® Sonar User's Manual, Volume 1 8.2 DEPTH DELAY AND DURATION .................................................................................... 120 8.3 OVERLAY ..................................................................................................................... 123 8.4 DOWNSAMPLE .............................................................................................................. 125 8.5 SPEED .........................................................................
June 2004 Isis® Sonar User's Manual, Volume 1 9.8.5 Parts of the Dialog Box Common to All Levels .................................................... 195 9.8.5.1 Do it Button .................................................................................................................. 195 9.8.5.2 Status ............................................................................................................................ 196 9.9 ASCII REPORT .......................................................
June 2004 Isis® Sonar User's Manual, Volume 1 10.6 GRAPH ........................................................................................................................ 253 10.6.1 Pitch, Roll, Heave ............................................................................................... 253 10.6.2 Navigation .......................................................................................................... 254 10.6.3 Telemetry .........................................................
June 2004 Isis® Sonar User's Manual, Volume 1 12.3.3 Graphics Processor ............................................................................................ 289 12.3.4 SCSI Controller .................................................................................................. 289 12.3.5 Trackball............................................................................................................. 289 12.4 EMERGENCY BOOT DISK .............................................................
June 2004 Isis® Sonar User's Manual, Volume 1 Chapter 1 1 Isis Overview 1.1 Introduction to Isis Isis is a compact, low-cost, modular, shipboard data acquisition and image processing system. The system is designed to acquire, process and store multiple channels of side-scan sonar, and multibeam echo-sounder data. Isis will also acquire and store any sensor having an RS232 serial output, including navigation, towfish attitude information, depth, gravity, and magnetic data.
June 2004 Isis® Sonar User's Manual, Volume 1 2 Figure 1-1. Isis system by Triton Elics The Isis hardware and software system is modular. Isis modularity gives the user the means to customize the data acquisition system for a specific task. The modular nature of Isis system architecture also eases modification and expansion of the system as needs change. Users can develop server programs that operate outside of Isis. Again, Isis modularity makes this possible.
June 2004 Isis® Sonar User's Manual, Volume 1 3 1.2 Theory of Isis Operation The early data acquisition and image processing efforts at Triton focused on side-scan sonar imagery. Significant advances were made in the acquisition and processing of side-scan sonar data. These advances have drastically improved the resolution of data acquired with Triton Elics’s systems and eased interpretation of these data. 1.2.
June 2004 Isis® Sonar User's Manual, Volume 1 4 Figure 1-2. Imaginary seafloor as arbitrary reference point for sonar altitude Isis grew out of the Q-MIPS system and incorporates many new features; for example it now has the ability to incorporate topographical information from multibeam echo sounder data. Isis now has the ability to use topographical data from multibeam echo sounder data to correct the side-scan imagery. Isis provides a modular, compact, low-cost alternative to Q-MIPS.
June 2004 Isis® Sonar User's Manual, Volume 1 5 the same serial port. Alternatively, another serial port can be used. Custom interfaces can also be created by Triton Elics for sonars whose telemetry data is transmitted in a specific manner. 1.2.3 Real-Time Data Processing With real-time processing, it is possible for the user to interpret features visible in the processed data (but perhaps not in the raw data) as they are collected.
June 2004 Isis® Sonar User's Manual, Volume 1 1.2.5 6 Choice of Data Storage Formats and Media Isis is capable of storing data in one of three standard data formats: XTF, Q-MIPS and SEG-Y.
June 2004 Isis® Sonar User's Manual, Volume1 Chapter 2 Getting Started with Isis Software Your system comes to you with your Isis software already installed on your hard disk.
June 2004 Isis® Sonar User's Manual, Volume1 8 Figure 2-1. Typical listing of TEI software installation folders TEI software is compatible with Windows 95, Windows 98, Windows NT 4.0, and Windows 2000. The following notes will help you achieve a smooth installation of the software. • Please exit from all other applications before running any of the installation programs. • You will not be able to complete the installation on an NT4.0 or Windows 2000 system if you do not have administrator’s rights.
June 2004 Isis® Sonar User's Manual, Volume1 • • • • • • • • • • 9 Each application is installed by browsing to the appropriate folder (for example, Isis5.50 Install) on the CD and double-clicking on the SETUP.EXE file found in that folder. TEI recommends that if you have more than one hard drive, you install the software on the second (usually the D:) drive, using the default folder names on the CD.
June 2004 Isis® Sonar User's Manual, Volume1 • 10 The installations make two changes which are not restored when the programs are removed using Add/Remove Programs. They are: the addition of a folder called [TEIdlls] in the Windows or WINNT folder; and a modification to the PATH environment variable, which adds the [TEIdlls] folder to the PATH. The [TEIdlls] folder can be safely deleted after all TEI software has been removed. 2.
June 2004 Isis® Sonar User's Manual, Volume1 11 You will need to remove the old version of the software before you will be permitted to install the new version. To do so, enable the Remove button in the dialog box and click Next. You can then install the new version by rerunning setup.exe. As noted above, some items are deliberately not removed during the uninstall process; doing so can cause problems.
June 2004 Isis® Sonar User's Manual, Volume1 12 Solution: You MUST reboot the system after finishing the installation. This is necessary so that changes to PATH environment variable can be applied. Problem: You may not be able to install all the options (demo files, manuals, help files) unless you can free enough space on the C: drive. Consider using the Minimum Installations option located on the CD to install only the programs you need.
June 2004 Isis® Sonar User's Manual, Volume1 13 The files must be unique on the system (that is, there must be only one instance throughout your entire computer). The installer copies the latest version to a folder {Windows Folder}\TEIdlls during the installation process. If any files with the above names are found that are not in {Windows Folder}\TEIdlls, then you should delete (or rename) them. You receive an error message during installation of TEI software.
June 2004 Isis® Sonar User's Manual, Volume1 14 Figure 2-3. Find License File dialog box 2.5 Keeping a Log In Record Mode, Isis appends text entries to a file called SURVEY.LOG located in whatever drive Isis is running from.
June 2004 Isis® Sonar User's Manual, Volume1 15 begun or the file name changes. However, when the Klein 5000 server is running, all sonar settings that controls the Klein 5000 sonar are also noted in the file. A sample of part of the contents of a SURVEY.LOG file is shown in Figure 2-4. It is potentially dangerous for you to open the survey.
June 2004 Isis® Sonar User's Manual, Volume1 16 Figure 2-4. Sample SURVEY.LOG created by Isis If the first line of the log file contains only the characters LOG, Notepad will automatically insert the current time and date each time the file is opened. You also can press F5 to insert the current time and date at the insertion point.
June 2004 Isis® Sonar User's Manual, Volume1 17 to your Windows documentation for detailed instructions on using the Notepad editor. 2.6 Providing Runtime Parameters to Isis Sometimes you might want to pass extra information to Isis when you start the program. You can do so through the Windows graphical user interface or at the DOS prompt. In both environments, Isis recognizes certain switches, explained next, as the means for passing the information.
June 2004 Isis® Sonar User's Manual, Volume1 18 Table 2-1. Isis runtime switches Switch Name What the Switch Does /CFG={parm} parameter {parm} to the right of the equal sign has the form {filename}.CFG If you don’t specify a CFG name, the system uses a default CFG file name of ISIS_ plus the local computer name. This allows the program to be run from a single network directory to many different workstations, each with its own configuration file.
June 2004 Isis® Sonar User's Manual, Volume1 /GOTOTIME={parm} 19 parameter {parm} to the right of the equal sign has the form dd/mm/yyyy_hh:mm:ss and causes Isis to start playing at the given date and time in the current file. Note: Any single character (including spaces) can be used as a delimiter to separate time and date values. Example (for space reasons, shown on wrapped lines here): Isis c:\xtfdata\034_1325.xtf /GOTOTIME=02/01/2001_13:35:05 In the example, Isis plays file 034_1325.
June 2004 Isis® Sonar User's Manual, Volume1 /GOTOPING=n 20 The parameter n must be an integer representing a ping number in the file to be played back. Isis starts playing back the file at the given ping number. Example: Isis c:\xtfdata\034_1325.xtf /GOTOPING=1234 In the example, Isis plays back file 034_1325.xtf starting at ping 1234. /HELP or /? /NOWARN /OPENGL /PAUSETIME={parm} displays all other recognized command-line parameters Warnings won't appear about the number of colors on startup.
June 2004 Isis® Sonar User's Manual, Volume1 /SESSION=n {filename}.XTF {filename}.DAT {filename}.SEG {filename}.RUN 21 Isis runs and identifies this particular session of the Isis program with the number n (n being a singledigit integer you specify) in the program’s Title Bar. For example, you could start one session of Isis with the command line ISIS.EXE /SESSION=1 and another with the command line ISIS.EXE /SESSION=2. The command string is case insensitive.
June 2004 Isis® Sonar User's Manual, Volume1 Chapter 3 Using the File Menu You use the File menu to manage common tasks in Isis: record or play back Isis imagery from a disk or tape drive prepare Isis to record new data in a particular file format or medium move rapidly — by time, ping, or location — to different parts of a data set print some or all of a data set (§5.6, ‘Sending Isis Imagery to a Plotter/Printer'). This chapter explains these functions found in the File menu. To access the File menu 1.
June 2004 Isis® Sonar User's Manual, Volume1 Figure 3-1. The File menu from the main menu If a choice is grayed out, that choice currently is not available to you until you take some other action. 3.1 Playback You use this function to open a data set from disk or tape and play it back for viewing and/or post-processing. Valid data set file types are DAT, XTF, SEG, TRA, and RUN. The RUN file type refers to an Isis batch file (described in this section).
June 2004 Isis® Sonar User's Manual, Volume1 24 Note that if you are playing back a file and you save the configuration when exiting, the next time you open Isis from the desktop icon, the last file played back will begin playing automatically. 3.1.1 Playing Back data Sets from Disk or Tape Data sets can be played back from disk or tape. To play back a data set from tape Please refer to §3.2, ‘Working with SCSI Tape’. Also refer to ‘Playing Back from Tape’.
June 2004 Isis® Sonar User's Manual, Volume1 25 Click the running man icon to speed up the playback Each click decreases or increases, respectively, the rate of playback by one ping to read per update. From the main menu choose Configuration→Playback Speed for more options to control playback speeds.
June 2004 Isis® Sonar User's Manual, Volume1 26 of the file to the top of the file. This can be done with any XTF, TRA, DAT or SEG-Y file. The advantage of playing a file backwards occurs when you want to visually compare similar data running side-by-side. This is possible only if you are playing back at least two files in separate Isis sessions (one file per Isis session). For example, let’s say a survey line was conducted north to south to record some side-scan data.
June 2004 Isis® Sonar User's Manual, Volume1 27 Figure 3-3. Disk or Tape playback dialog box. 3. Click Backwards Disk Playback. The system displays the Backwards Playback dialog box (Figure 3-4). Figure 3-4. Backwards Playback dialog box As the Backwards Playback dialog box shows, you can flip the waterfall image left-right to compensate for the lateral inversion caused by the backwards playback. If you do, however, be aware that your references to port and starboard will be similarly flipped.
June 2004 Isis® Sonar User's Manual, Volume1 28 4. Click OK or Cancel. If you click Cancel, Isis returns to the Disk or Tape dialog box (Figure 3-3). If you click OK, Isis displays an Open dialog box where you can choose or browse for the file to be played backwards. 5. Choose a file to play backwards and click Open. The file plays back from its end of file toward its beginning of file. While this happens, Backward Playback displays near the file name in the Parameter Display window.
June 2004 Isis® Sonar User's Manual, Volume1 29 Choose File→Goto→End The playback starts over again from the end of the file to the start. 3.1.3 Playing Back a Series of Data Sets Starting with Isis version 4.52, Isis has limited support for playing back files in batches, or sets. An Isis batch file is identified with the file type extension RUN and contains a list of file types Isis can recognize.
June 2004 Isis® Sonar User's Manual, Volume1 30 the batch file would repeat itself and continue to loop like this until the user took some action to interrupt the playback, such as pressing the [End] key, perhaps. Finally, consider the contents of this RUN file called flawed.RUN: Furgbump.XTF wallsnip.XTF rundat.RUN runxtf.RUN In the above example, playback of runxtf.RUN would never occur from flawed.RUN because when Isis reaches rundat.RUN, program control would transfer to rundat.
June 2004 Isis® Sonar User's Manual, Volume1 31 Figure 3-5. Creating a RUN file from the DOS Prompt While still at the DOS prompt, you can visually inspect the result by issuing the DOS TYPE command (Figure 3-6): Figure 3-6.
June 2004 Isis® Sonar User's Manual, Volume1 32 You can, of course, use a text editor to inspect or modify a RUN file, such as changing the order of the listed files or deleting or adding an entry. To play back a batch file in Isis • Open a RUN file just as you would any other file for Isis playback. See ‘Playing Back Data Sets from Disk or Tape’. 3.2 Working with SCSI Tape Isis supports real-time data storage and playback to and from any sequential SCSI device.
June 2004 Isis® Sonar User's Manual, Volume1 33 Recording can resume by positioning the tape past a filemark before starting Record mode or before copying a file from disk to tape. At that point, data can be appended to the tape. 3.2.3 Features While recording to a tape drive, you can zoom (log contacts) exactly as though you were storing to hard disk. Also, one or two tape drives can be used in a “round robin” fashion such that no data is lost when switching tapes.
June 2004 Isis® Sonar User's Manual, Volume1 34 To set up your tape for recording or playing back 1. From the Isis main menu, choose File→Tape Drive Control→Options. Isis displays the Tape Drive Control Options dialog box (Figure 3-9). This dialog box shows that all temporary files created during playback and recording sessions will be deleted after a playback or recording session completes. This default choice saves you disk space.
June 2004 Isis® Sonar User's Manual, Volume1 • 35 Click the tape drive radio button corresponding to the tape drive you will be using. For a single tape drive, choose 3. If you have a dual tape drives in your Isis system, choose 3 (for the upper drive) or 4 (for the lower drive). • Click either Automatically (<5%) or Manually to set the switching method you want Isis to use when you want the recording or playback to continue on the other tape drive.
June 2004 Isis® Sonar User's Manual, Volume1 36 3. From the Isis main menu choose File→Start Recording→Record Data→Save As; supply a file name for the imagery to be captured and click OK. You can pick any file name you want or let Isis default to the JJJ-HHMM.XXX naming scheme. Recording starts and Isis displays the specified file name in the Parameter Display dialog box, along with other statistics for this session: date, time, ping number, and remaining disk space.
June 2004 Isis® Sonar User's Manual, Volume1 37 3. Choose a playback option: Reset Drive (Load Tape), Play, Rewind to Start, Rewind 1 File, or Advance 1 File. 4. If you wish to play back the last file on the tape, choose Advance to End then Rewind 1 File. Table 3-1 explains the options. Figure 3-7. Tape Drive Control dialog box 5. Choose Play to begin Playback Isis reads the tape, displays the imagery on your screen, and reports Reading from tape [#] (i.e.
June 2004 Isis® Sonar User's Manual, Volume1 38 entire contents of the tape file to the temporary directory specified in the Options portion of the Tape Drive Control dialog box (Figure 3-9). The Parameter Display dialog box of Isis displays the usual statistics for the active data imagery. Table 3-1. Choices in Tape Drive Control dialog box Option Meaning and Comments Tape drive The 3 radio button refers to SCSI ID 3, and 4 refers to SCSI ID 4.
June 2004 Isis® Sonar User's Manual, Volume1 Advance to End 39 Positions the tape at the end of the last recorded file (at the tape’s end of file mark). This action prepares the tape to have data appended to the end of a previously recorded tape. Rewind 1 File Positions the tape back one file from the tape’s current position. Advance 1 File Positions the tape forward one file from its current position. Status Displays messages indicating which function is occurring now.
June 2004 Isis® Sonar User's Manual, Volume1 40 Figure 3-8. Switch File dialog box (from Parameter Display window) 3.2.8 Copying Files to and from Disk and Tape You perform these functions using the Tape Drive Control Options dialog box (Figure 3-9) and its parent dialog box, the Tape Drive Control dialog box (Figure 3-7).
June 2004 Isis® Sonar User's Manual, Volume1 41 F Figure 3-9. Tape Drive Control Options dialog box To copy files from disk to tape 1. From the Isis main menu choose File→Tape Drive Control→Options. 2. In the Copy Files area of the Tape Drive Control Options dialog box, click Disk to Tape, then click OK. 3. The system displays a dialog box where you can browse for a file name. 4. Choose a file name or multiple files by holding down CTRL and selecting your files; then click OK. Copying starts.
June 2004 Isis® Sonar User's Manual, Volume1 42 4. In the Copy Files area of the Tape Drive Control Options dialog box, click Tape to Disk, then click OK. Copying starts. To copy files from tape to tape 1. From the Isis main menu choose File→Tape Drive Control→Options. 2. In the Copy Files area of the Tape Drive Control Options dialog box, click Tape to Tape, then click OK. Copying starts. 3.2.
June 2004 Isis® Sonar User's Manual, Volume1 Playback options Directory for temporary files created during (two text boxes playback from tape: and one button) In this text box you can specify a particular directory to be the “working directory” to hold the files spooled to disk while tape operations are underway. If you don’t specify a temporary directory, ISIS will use your current directory to hold the temporary files.
June 2004 Isis® Sonar User's Manual, Volume1 Utility (child button) 44 Build directory from tape Clicking this button directs Isis to display a sequential list of file names with their creation dates and times. You can use a file’s sequence number from this list as the directory file num to play back. A sample listing, with sequence numbers appearing in the leftmost column is shown in Figure 3-10.
June 2004 Isis® Sonar User's Manual, Volume1 45 3.2.10.1 File: Record Setup: File Format: Log to tape When you choose Log to tape, the Tape Drive Control dialog box automatically starts when Record Mode starts. It is there for convenience only — the exact same thing can be accomplished by selecting Tape Drive Control... from the File menu. 3.2.10.2 File: Record Setup: File Format: Log to tape: Options… This button activates the Tape Drive options dialog box. This is the same as pressing the Options...
June 2004 Isis® Sonar User's Manual, Volume1 46 3.4 Pause The Pause option temporarily stops playback of data at the current ping. Selecting Pause a second time resumes playback of data at the ping where playback was stopped. The SPACEBAR is the keyboard shortcut for this operation and toggles Pause on and off. 3.5 Scroll Direction You can control the direction of a scrolling horizontal or vertical waterfall by a menu selection or by keyboard keys.
June 2004 Isis® Sonar User's Manual, Volume1 47 Figure 3-11. Isis Explorer with sample XTF files listed After the files are listed, the user can display one or more files in Isis by highlighting a file or files and then clicking the toolbar Play button. Alternatively, the user can drag the selected file and drop it into the Isis workspace. While Isis displays (plays back) the data, the user can pause the display from within Isis. 3.6.
June 2004 Isis® Sonar User's Manual, Volume1 48 searching for one or more XTF files. This is the same dialog box available from the main menu of Isis as File→Go To→Specify Search Wildcard • File→Exit: Closes the Isis Explorer dialog box. The keyboard shortcut is CTRL+X. 3.6.1.2 Isis Explorer View Menu • View→Toolbar: Enables or disables the display of the toolbar. A check mark next to Toolbar indicates the Toolbar display is enabled.
June 2004 Isis® Sonar User's Manual, Volume1 49 Figure 3-12. Time Range Settings dialog box A check mark in the time range disables the fields. This is the default. When the time range is unchecked, you can specify starting and ending dates from a pop-up calendar accessed by clicking ▼ next to a date field. You can also change the starting and ending times when the time range is unchecked: Type over the existing numbers or else use the up and down directional indicators ( ) to set new times. 3.6.1.
June 2004 Isis® Sonar User's Manual, Volume1 50 Figure 3-13. Example of a message identifying event status change 3.6.1.4 Isis Explorer Help Menu Functions • • Information box with Isis Explorer version number and copyright information. Clicking the Question Mark icon on the Toolbar (Figure 3-11) is equivalent to choosing Isis Explorer→Help. 3.6.2 Isis Explorer Toolbar Buttons The Isis Explorer has two toolbar iconized buttons: a playback button and a menu button. They are shown in Figure 3-11.
June 2004 Isis® Sonar User's Manual, Volume1 • 51 connection, and yellow denotes an inactive connection. See Figure 3-11. [End] key behavior under Isis Explorer — If you have more than one file selected in your Isis Explorer list, and you press [End] to go to the end of the currently scrolling file, Isis Explorer does not automatically go on to play back the next file in your list. Instead, the file that was scrolling stops scrolling at the end of file.
June 2004 Isis® Sonar User's Manual, Volume1 52 user chooses a file in the Isis Explorer tool and either double-clicks the filename or clicks the right-arrow Play button, the file in Isis that is currently playing will stop and the new file will be played. After one or more files are called from Isis Explorer and played back in Isis, the highlighting of the file(s) in Isis Explorer changes to green to indicate the file that Isis currently is playing back. See Figure 3-11 for an example of this.
June 2004 Isis® Sonar User's Manual, Volume1 53 3.7.4 Time Use the Go to Time option to go to the specified point either in the current file or all files. The default is to Search all files. Figure 3-15. Go to Time dialog box You specify a time according to standard hour, minute, and second time format. The keyboard shortcut is ALT+T to get this dialog box.
June 2004 Isis® Sonar User's Manual, Volume1 54 initiated from within ROVFlight with the Lookup Location in Isis button and from within Target with the Playback in Isis command.) When you select Go to Location, Isis prompts you to specify the location in northings and eastings or in latitude and longitude depending on the navigation coordinate system of the currently loaded data file.
June 2004 Isis® Sonar User's Manual, Volume1 55 3.7.6 KP Go to kilometers of pipe. If your data file contains tracked pipe, Isis will go to that part of your imagery that contains the KP value you type in the dialog box. An example is shown in Figure 3-17. Figure 3-17. Kilometers of Pipe (KP) dialog box 3.7.7 Event The Go to Event command is grayed out and unavailable in the current version of Isis. 3.7.
June 2004 Isis® Sonar User's Manual, Volume1 56 3.7.9 Previous File in Time This option causes Isis to look for the next file in your current directory that contains the previous earlier navigation date and time, if such a file exists. The keyboard shortcut for this action is ALT+[Page Down]. 3.7.10 Specify Search Wildcard As an aid to narrowing your search for a previous or next file to play back, choose this option. You can specify how each file name will start and/or end.
June 2004 Isis® Sonar User's Manual, Volume1 57 File menu to turn the feature on. Select it again to turn it off. When activated, the command has a check mark next to it. If you select Go to Next File in Time, Isis will automatically play back a series of data files in chronological order. To determine where a file falls in chronological order, each data file is opened and scanned for the first and last time/date in the file.
June 2004 Isis® Sonar User's Manual, Volume1 58 To stop saving imagery to a disk file Depending whether you told Isis to save a single window or a scrolling waterfall, Isis responds in one of two ways: • If you chose to capture just the imagery in the current window, Isis closes the Save As dialog box when you click OK on that dialog box. At that point, Isis stops saving the imagery and closes the saved TIFF or PCX file.
June 2004 Isis® Sonar User's Manual, Volume 1 59 Chapter 4 Setting Up Isis To Record Data Setting up Isis to record data involves working with three types of information: • choosing an ensonifying device and identifying it to Isis • choosing appropriate serial ports that Isis will used to get specific navigation data • choosing a file format in which Isis will save your data Isis needs to know the parameters for all three of these areas in order to be able to record successfully.
June 2004 Isis® Sonar User's Manual, Volume 1 60 4.1.1 Setting Up for a Sidescan or Subbottom Sonar Sidescan sonars and subbottom profilers are frequently used with Isis and hence represent the most common choice for recording. To set up a sidescan or subbottom profiler for Isis 1. From the File menu choose Record Setup→Sonar Setup. The system displays the Select Sonar dialog box (Figure 4-1).
June 2004 Isis® Sonar User's Manual, Volume 1 61 As Figure 4-1 shows, you can select from two general categories of sonars: sidescan (listed in the first two columns) or multibeam (listed in the last column). Standard Analog is the default selection. 2. From the sidescan/subbottom group choose the brand of sonar you are going to use. When you make your choice, the system might display the Select Digital I/O Card dialog box (Figure 4-2), depending on which sonar you choose.
June 2004 Isis® Sonar User's Manual, Volume 1 62 Figure 4-2. Select Digital I/O Card choice dialog After you choose a sonar type (and, potentially, a type of digital I/O card), the Isis software displays the Sidescan Sonar Information dialog box (Figure 4-3). Figure 4-3. Sonar Information dialog box for side-scan or subbottom profilers In the top left area of the Sonar Information dialog box, you can select a channel to be added, edited, or deleted. Unnamed channels are designated .
June 2004 Isis® Sonar User's Manual, Volume 1 63 available text boxes. Table 4-1 explains the options. You can use the arrow keys on your keyboard to scroll through the list if the values go beyond the edges of the text box. You can modify the text in any of the boxes visible above (including the upper left box of selected channels, by way of the Channel Setup Edit button). Table 4-1.
June 2004 Isis® Sonar User's Manual, Volume 1 64 This is the direction you are aiming a given channel. The direction is expressed in degrees offset from an imaginary horizontal plane corresponding to the surface of the water, viewed flat. The listed angles correspond to the named channels (left to right and top to bottom, respectively).
June 2004 Isis® Sonar User's Manual, Volume 1 65 Table 4-2. Setup Input Channel options Option Meaning and Comments The channel can be turned On or Off. Channels that have been specified as On are numbered in the order that they are listed. This is the order that Isis will expect to receive the data. In this text box should be the name of the channel that Channel Name reflects the type of data you will acquire on the channel specified in Type of Channel.
June 2004 Isis® Sonar User's Manual, Volume 1 66 Figure 4-5. Advanced Record Setup dialog box Here are two examples that show how this feature might be used: • Isis session 1: Set Memory-mapped file no. to 0 and DSP Device Index to 1. Configure this session to use SBAT81XX for bathy and any sidescan. • Isis session 2: Set Memory-mapped file no. to 2 and DSP Device Index to 2. Configure this session to use Klein 2000 (or any sonar through ChicoPlus).
June 2004 Isis® Sonar User's Manual, Volume 1 67 confidence window can also be summoned from Windows→Status and Control→Bathymetry Confidence (Figure 10-31). To set up a multibeam sonar for Isis 1. Choose Sonar Setup from Record Setup of the File menu. 2. Choose any of the multibeam types shown in the right column. The system displays a dialog box for your chosen multibeam sonar.
June 2004 Isis® Sonar User's Manual, Volume 1 68 Figure 4-6: Serial Port Setup dialog box The panels in the Serial Port Setup dialog box have the following meanings: • Serial Port (radio buttons) — COM 1 through COM 16. Your system may have fewer than 16 COM ports, so your choices are constrained by the number of actual COM ports installed on your system. Therefore, select a COM port available to your system. • Status (check box) — Status is either on (On checked) or off (On unchecked).
June 2004 Isis® Sonar User's Manual, Volume 1 • 69 Baud Rate: 4800 and 9600 (commonly used by GPS receivers) Data Bits: 8 Parity: NONE Stop Bits: 1 Navigation/Telemetry Template (buttons and text area) — If any template has been specified, its name appears here, in which case it becomes the template Isis uses to parse the incoming navigation/telemetry strings for this port. Figure 4-6 shows the telemetry template that appears when HYPACK has been selected.
June 2004 Isis® Sonar User's Manual, Volume 1 70 • Convert Lat/Long to UTM (check box) — If a special navigation option is included and enabled with this Isis system, Isis will convert Latitude and Longitude, as acquired over a serial port, to Universal Transverse Mercator (UTM) coordinates. This conversion option should be used as a last resort. Conversion to UTM is always best done by an integrated navigation system. See the explanation for Setup UTM button, next.
June 2004 Isis® Sonar User's Manual, Volume 1 71 Figure 4-7: Setup UTM dialog box • Filter Speed Input (check box) — When Isis is in Record mode, Isis computes speed input. You can filter speed “on the fly” (Figure 4-8).This is convenient because it lets you bypass the Record Setup menu in Isis (a menu which is unavailable to you when you are playing back imagery).
June 2004 Isis® Sonar User's Manual, Volume 1 72 Speed is filtered according to the following formula: 1. Speed is forced to be between the min and max values as set by the user. 2. Speed is smoothed by taking 90 percent of the previous speed and 10 percent of the new (just received) speed. 3. The amount of time that has elapsed between speed updates is computed.
June 2004 Isis® Sonar User's Manual, Volume 1 73 Figure 4-9: Partial view of COM Port Test box before ports are assigned 4.3 File Format Setup As of Isis version 4.32, Isis can read a format called TRA, also from Triton Elics International. However, Isis cannot write TRA files. Note: When reading TRA files, if information can’t be found in the corresponding PAR file, Isis displays a warning. In the File Format dialog box, you can specify the file format Isis will use to save your data.
June 2004 Isis® Sonar User's Manual, Volume 1 74 Figure 4-10: File Format dialog box Here’s what the various parts of File Format dialog box mean: • • • File Format — Save in Q-MIPS, XTF, SEG-Y format. Refer to Appendix B for a description of these formats. SEG-Y format is an Isis option, available only if it has been purchased for this system. Media — Save to a random-access disk or to Exabyte tape. Isis uses true SEG-Y tape format and a modified SEG-Y format for disk storage.
June 2004 Isis® Sonar User's Manual, Volume 1 75 If 16-bit data are saved, only 8 of those 16 bits will be displayed. Use the Threshold slide bar in the Waterfall window dialog box to shift the displayed bits. Please be aware that VISTA software from Triton Elics cannot process 16-bit data that used 4 channels to record data. Samples per Channel to Record — Specify the number of samples that Isis will record for each ping and each channel. Select a pre-defined number or type a number in the Custom box.
June 2004 Isis® Sonar User's Manual, Volume 1 76 • Operator name: optional user-provided info goes here. The text from these three fields gets put into the XTF file, just after the file header. This information also appears in Help→Get Info, in any saved file in ASCII Report dialog (if XTF Notes is checked), and in hardcopy annotation (if Print Notes on hardcopy is checked). 4.
June 2004 Isis® Sonar User's Manual, Volume 1 77 After recording has started you can monitor the current size of the file from the Switch File button at the right side of the Parameter Display window. 4.5 The Switch File Dialog Box The Switch button is located in the Parameter window. Clicking Switch displays the Switch File dialog box where you can specify the maximum size a file shall have before a file switch will occur. The default is 200 MB.
June 2004 Isis® Sonar User's Manual, Volume1 78 Chapter 5 Printing in Isis You use the File→Print command to specify a hardcopy output device and begin sending imagery to that device. Isis supports a range printers and plotters that are not automatically supported by Windows. To Isis, these are non-standard printers. Such a printer must be locally attached to your Isis system in order to be able to print or plot to it from Isis. Any printer that is directly supported by Windows can also be used in Isis.
June 2004 Isis® Sonar User's Manual, Volume1 79 2. Select the device in Windows prior to running your application (Isis, in this case). 3. Run the application and select the previously identified device as the one to use for printing or plotting imagery. You may have to use all three procedures shown next in order to print from Isis. Because of the “plug and play” nature of Windows, identifying your plotter or printer to Windows is usually automatic.
June 2004 Isis® Sonar User's Manual, Volume1 80 2. Choose the printer icon from the taskbar or choose File→Print from the main menu. Isis displays the Plotter Setup dialog box (Figure 5-1). Figure 5-1: Plotter Setup dialog box with default settings 3. Choose your plotter or printer from the combination box. The default is none. Leave the choice as none if you do not have a plotter/printer attached to your system; otherwise, problems may result. 4.
June 2004 Isis® Sonar User's Manual, Volume1 81 Note: [1] If your plotter manufacturer’s instructions suggest other actions to the above general procedure, follow those instructions first. Some plotters do not support the Plot directly to port option available in the Isis Plotter Setup dialog box. If that is the case for your plotter, disable the Plot directly to port option in File→Print→Plotter Setup by clearing the check mark next to the option.
June 2004 Isis® Sonar User's Manual, Volume1 82 the device first be activated outside of the application where it will be used. At this point, you have instructed Windows to use a specific plotter or printer with your application(s), with properties enabled. 5.5 Special Settings for Some Isis Plotters Besides the foregoing printer setup requirements, some plotters have additional special settings that should be made before you print in Isis. They are explained next. 5.5.
June 2004 Isis® Sonar User's Manual, Volume1 2. 3. 4. 5. 6. 7. 8. 9. 10. 83 • Sweep: Forward • Contrast: 0 • Repeat Ln: 1 • Shades: 64 • Width: 2048 Make any other selections at the EPC 1086 plotter suitable for your plot session. You might want to save your sets of values as a configuration set, using the plotter’s arrow keys to bring the Save As Config_x and Save Settings Config_x choices into view of the status window (where x is an integer), and pressing Save on the plotter.
June 2004 Isis® Sonar User's Manual, Volume1 84 See the procedure entitled ‘To print a single screen from Isis 2.11 or later’ for the related settings. 5.5.3 Using an EPC 9502 Plotter with Isis Triton Elics has tested an EPC 9502 plotter (serial number 109). It works with the current version of Isis. 1. Follow the general procedure described in §5.2. 2. From the File→Print→Plotter Setup series of menus in the Isis software program, choose EPC 980X as your plotter.
June 2004 Isis® Sonar User's Manual, Volume1 85 5. Press [Shift] [ONLINE] again to put the plotter on-line. To configure Isis for the 195 or 200 plotter 1. Run Isis and start playing back a file. Press to pause the playback. 2. Choose the printer icon on the toolbar at the top of the Isis window. 3. Choose Waverley 195 as the printer. 4. Choose Plot All to print all channels across the page. 5. Verify that Fast Output is not checked. 6. Set Status to On. 7. Choose OK. 8.
June 2004 Isis® Sonar User's Manual, Volume1 86 If the test program fails, you will want to make another test that checks to see if your printer port is wired correctly. You can perform the tests either from DOS or Windows. To verify from DOS that your printer port is working 1. Disconnect the plotter from your printer port and connect a regular printer to the port. 2. At the DOS command prompt type: ECHO This is a test > PRN 3. Press ENTER to redirect the string of characters to your printer.
June 2004 Isis® Sonar User's Manual, Volume1 87 Your choices are On or Off. Status (radio buttons) On: If you are plotting to a non-standard Windows device and you selected On here, Isis will display a separate dialog box and report the following parameters during the plotting session: Queue status, Lines plotted, Lines dropped, Suspend Output.
June 2004 Isis® Sonar User's Manual, Volume1 88 Pos and Neg: Prints both positive and negative polarity Rectify (radio buttons) sonar data. Positive only: Only sonar data with positive polarity are plotted. Negative-valued data are not plotted. Negative only: Only sonar data with negative polarity are plotted. Positive-valued data are not plotted. Note: Because eight-bit data can’t be negative in Isis, this function is grayed out if you are working with eight-bit data.
June 2004 Isis® Sonar User's Manual, Volume1 89 Width refers to the percent of the page you want this channel (listed to the left of Width) to plot. Each channel can have a width value independent of the other channels. The default is to divide the width evenly among all the available channels. Reverses the order of all pixel values in the specified Flip (check boxes) channel of the active waterfall.
June 2004 Isis® Sonar User's Manual, Volume1 Figure 5-2: Hardcopy Annotation dialog box Chapter 5: Printing in Isis 90
June 2004 Isis® Sonar User's Manual, Volume1 91 Table 5-2. Groups of options available in hardcopy annotation Option Meaning and Comments Annotation StatusOn or Off. The default is Off. Items to Print Any combination of the listed items can be selected. The current value of each selected item will be included with each hardcopy annotation. Time Select a regular time interval, or none, for hardcopy annotation. Distance Select a regular distance, or none, for hardcopy annotation.
June 2004 Isis® Sonar User's Manual, Volume1 92 Don’t blank-out imagery behind annotation When Isis prints annotations associated with data imagery, the annotation prints in a box that is superimposed over the imagery. Isis can send this box to the foreground or background of the printed image. In both cases, the annotation text displays in the foreground. However, if the box containing the annotation text is in the foreground, the box blocks whatever data may be “underneath” it.
June 2004 Isis® Sonar User's Manual, Volume1 93 Chapter 6 Using the Configure Menu You use the Configure menu to tailor the Isis software for a planned data survey. Through the Configure menu, you can change a number of parameters that can help optimize your data survey. All of the configuration parameters are optional. Not all configuration choices are available in both Record Mode and Playback Mode. In Record Mode, all configuration choices except Playback Speed are available.
June 2004 Isis® Sonar User's Manual, Volume1 94 6.1 Playback Speed (Playback Mode Only) The Playback Speed command allows you to adjust the number of pings, or data throughput, that Isis will process at one time for displaying imagery. When throughput is small, displayed images in Isis scroll more smoothly but more slowly than large throughputs do. Playback Speed is only meaningful in Playback Mode. (In Record Mode, Isis processes the pings one at a time as they are received.
June 2004 Isis® Sonar User's Manual, Volume1 95 6.2 Realtime Scrolling (Record Mode Only) When you are acquiring data, you can decide which of three window scrolling methods shall be in effect while you are accessing any dialog box in Isis. Your scrolling method choice does not affect the data being recorded; it only affects the speed of the scrolling window while you are accessing an Isis dialog box.
June 2004 Isis® Sonar User's Manual, Volume1 6.3 96 Audible Alarms You can set up Isis to alert you with three types of audible alarms: A shallow alarm, a low-storage space alarm, and an end-of-file alarm. In Record Mode you can set either or both alarms, or none. In Playback Mode, you can only enable (or disable) the end-of-file alarm. 6.3.1 Shallow Alarm When enabled, the shallow alarm (Figure 6-3) allows you to specify a minimum towfish altitude below which Isis will issue an audible alarm.
June 2004 Isis® Sonar User's Manual, Volume1 6.3.2 97 Low Storage Space Alarm When enabled, the Low Storage Space Alarm (Figure 6-4) audibly alerts you when you have only have a given percentage of your storage space left for storing your recorded imagery. Figure 6-4: Low Storage Alarm dialog box The defaults in the dialog box are to have Storage Alarm On disabled (box unchecked) and Standard alarm sound enabled (radio button darkened). 6.3.
June 2004 Isis® Sonar User's Manual, Volume1 98 because the position of the transducer is a constant, and therefore its depth is a constant. Figure 6-5: Depth equivalency in Transducer Depth and Parameter Display As Figure 6-5 shows, the depth you specify here is identical to the depth reported in the Telemetry panel of the Parameter Display Window. If Transducer Depth is specified as zero, Isis stores the towfish depth as acquired over the serial port.
June 2004 Isis® Sonar User's Manual, Volume1 6.5 99 Ocean Tide (Record/Playback) With the Ocean Tide command, you can specify a tide level above or below mean low-low tide. From Record Mode, a non-zero value entered here will be stored in the data file. If the value is set at zero, Isis will store tide as it is acquired over the serial port. Refer to Appendix D, ‘Serial Interfaces’ for guidance in the configuration of serial interfaces.
June 2004 Isis® Sonar User's Manual, Volume1 100 Figure 6-7: Speed of Sound dialog box In Record Mode, the value entered here is stored with the data. In Playback Mode, the value entered here overrides the value stored with the data for display purposes. 6.7 Multiple Pings (Record Mode Only) You use the optional Multiple Pings command (Figure 6-8) to specify the number of pings that you want in the water column at one time.
June 2004 Isis® Sonar User's Manual, Volume1 6.8 101 Hypack DDE (Record Only) Hypack is an integrated software application for collecting navigation data that comes from Global Positioning Satellite (GPS) technology. It provides real-time input to other applications, such as Isis. Through the Hypack DDE command in Isis, you can choose which data survey parameters Isis will use as input at the time your data are being collected.
June 2004 Isis® Sonar User's Manual, Volume1 Figure 6-9: Hypack’s Device Setup dialog box Hypack Hardware utility displays its Connect dialog box. 5. In the Connect dialog box: a) Choose (none) in the Connect to: combination box (Figure 6-10).
June 2004 Isis® Sonar User's Manual, Volume1 103 Figure 6-10: Hypack’s Connect dialog box b) Click OK. 6. From the main menu in Hypack Hardware, test the GPS: Test→GPS. 6.8.2 Setting Up Isis for Hypack Just as Hypack has to be configured for Isis, Isis has to be configured for Hypack. To set up the Isis interface for Hypack from Isis 1. From the Isis main menu choose Configure→Hypack DDE. Isis displays the Hypack DDE Setup dialog box (Figure 6-11, also showing Test dialog).
June 2004 Isis® Sonar User's Manual, Volume1 104 Figure 6-11: Hypack Setup dialog boxes 2. Turn on or off any of the listed parameters that you wish Isis to use as input. An enabled parameter has a check mark in the box next to the parameter name. Click in the boxes to enable or disable the parameters you want Isis to use.
June 2004 Isis® Sonar User's Manual, Volume1 3. 4. 5. 6. 6.9 105 Hypack send ft. You can browse for a default directory for saving. This directory will also be used when start_logging is sent over a serial port. With Hypack and Isis running, choose Test or OK in the Hypack DDE Setup dialog box. If you choose Test: A parameter list appears where you can see and specify the actual values to be used for the variables named in the Hypack DDE Setup dialog box.
June 2004 Isis® Sonar User's Manual, Volume1 106 Figure 6-12: RAMP Support dialog box with Nav Uncertainty option If you press From registry, the system registry is inspected to determine the current location of the RAMP file, wherever it may be, and puts the RAMP file name in the Name text box here. Use Select if you wish to select something other than the current RAMP file.
June 2004 Isis® Sonar User's Manual, Volume1 107 As indicated in the sample shown in Figure 6-12, the Nav Uncertainty option of this dialog box displays Ship and Fish Lat/Long and their uncertainty values for the file being played back. To have the Nav Uncertainty window remain visible in playback 1. 2. 3. 4. 5. Play back an XTF file for which there is a RAMP file (File→Playback). From the Configure menu, choose RAMP Support. Click the Nav Uncertainty button in the RAMP Support dialog box.
June 2004 Isis® Sonar User's Manual, Volume1 108 Figure 6-13: ADDS Support dialog box 6.10.1 Directory for Cue Confidence files (CCD) This specifies the directory that Isis looks to for the CCD files. The name of the CCD file must have the same base name as the XTF or DAT file being played back. For example, if PR1648.XTF is being played, then the CCD file must be named PR1648.CCD and reside in the selected directory. 6.10.
June 2004 Isis® Sonar User's Manual, Volume1 109 of ADDS cues that can be read from a single CCD file is 10,000. If there are more than 10,000 cues in the CCD file, Isis ignores them. 6.11 Primary Sensor This function sets which sensor’s times and ping number to use when side-scan and multibeam are present. For most situations, leave at default setting of Sidescan data. This setting affects: • the time in the Parameter Window • the time and ping number used in ASCII report 6.
June 2004 Isis® Sonar User's Manual, Volume1 110 • number of channels originally recorded will be set for those same values on playback • all printers are turned off • no shallow alarm is set (value = 0) • playback speed set to 1 • target size set to 256 by 256 pixels • all COM ports set to off (and, therefore, no Nav template is present) • windows default settings: • If you are playing back DAT files, you will get two waterfalls (data running from top to bottom) • If you are playing back XTF files with b
June 2004 Isis® Sonar User's Manual, Volume1 111 Figure 6-14: Save Setup dialog box You can have Isis save the configuration automatically, or you can have Isis prompt you to save when you exit Isis. The default is to prompt you (Figure 6-15). Figure 6-15: Save Configuration Before Exit prompt When Save Isis Configuration Before Exit? is answered Yes, any file being played will be automatically re-loaded and played when Isis is restarted.
June 2004 Isis® Sonar User's Manual, Volume1 112 If you want to have multiple configurations, simply create multiple Isis shortcut icons. For each icon, set the shortcut properties so that the shortcut points to a unique CFG file name. For example, after creating a new Isis shortcut icon, modify the shortcut properties so that the Target field associated with the shortcut reads ISIS.EXE /CFG=ISIS1.CFG. This will cause the new icon to load ISIS1.
June 2004 Isis® Sonar User's Manual, Volume1 Figure 6-16: Typical security listing in the Security dialog box Chapter 6: Using the Configure Menu 113
June 2004 Isis® Sonar User's Manual, Volume1 114 6.15 Reset to Factory Config (Record/Playback) Reset to Factory Config deletes all *.CFG files in the Isis directory, returning the Isis configuration to the way it was when we shipped it to you.
June 2004 Isis® Sonar User's Manual, Volume1 Chapter 7 Using the Color Menu You use the Color menu to customize the colors the Isis software will use to display your data. This chapter explains the functions found in the Color menu. To access the Color menu 1. Load Isis from Windows by double-clicking the Isis icon. 2. Choose Color from the list of available menus. 3. The system displays the Color menu functions (Figure 7-1).
June 2004 Isis® Sonar User's Manual, Volume1 7.1 116 Palette The Palette option on the Color menu displays the Select Color Palette dialog box. It allows you to specify the color Look Up Table (LUT) for all Waterfall windows in the current session. You can also summon this dialog box directly via the keyboard shortcut, thereby bypassing the menu choice.
June 2004 Isis® Sonar User's Manual, Volume1 117 Table 7-1. Options in the Select Color Palette dialog box Side-Scan Colors Select one of the five gradational side-scan LUTs. The Gray Scale LUT has 236 levels and the others have 16 levels. Seismic Colors As an alternative to the side-scan LUTs, select one of the 16-level high-contrast Seismic LUTs.
June 2004 Isis® Sonar User's Manual, Volume1 7.2 118 Grid Colors Wiggle, Signal and Graph windows all use the same color scheme for their background grids. This color scheme can be specified in the Grid Colors dialog box. Figure 7-4: Grid Color dialog box The grid line and text colors are defined separately. There are eight colors available and each of these colors can be bright or dim. You can also specify the color of Scale Lines.
June 2004 Isis® Sonar User's Manual, Volume1 Chapter 8 Using the View Menu You use the View menu to determine how the Isis software will display your recorded data. This chapter explains the functions found in the View menu. To access the View menu 1. Load Isis from Windows by double-clicking the Isis icon. 2. Choose View from the list of available menus. The system displays the View menu. Its menu, with sample data, is shown in Figure 8-1.
June 2004 Isis® Sonar User's Manual, Volume1 8.1 120 Scale Lines The Scale Lines command allows you to apply scale lines to Waterfall imagery. Scale lines can be applied to all channels together or to each channel independently. Figure 8-2 shows the Scale Lines dialog box. Figure 8-2: Scale Lines dialog box When the Scale Lines command is selected, the Scale Lines dialog box is displayed. The units for Time or Distance change appropriately in the Spacing portion of the dialog box. 8.
June 2004 Isis® Sonar User's Manual, Volume1 121 Figure 8-3: Depth Delay and Duration dialog box Meanings of the options in the Depth Delay and Duration dialog box appear in Table 8-1. Table 8-1. Depth Delay and Duration options Apply Settings to (radio buttons) All Channels the Same — the chosen values will apply to all channels used in your data. Each Channel set Different — means you have to set your values separately for each channel used. You will have to click OK for each change so made.
June 2004 Isis® Sonar User's Manual, Volume1 Units (radio buttons) Start Point Specified as (radio buttons) Reference Depth (slider bar) Duration (slider bar) OK and Cancel 122 Choices are Off, Time (in milliseconds), or Distance. Time normally is used for subbottom channels. Distance normally is in meters and normally is used for side-scan channels. Select Off if depth correction, delay and duration will not be used.
June 2004 Isis® Sonar User's Manual, Volume1 8.3 123 Overlay If your imagery contains event marks, you can display them in the waterfall window of Isis during playback. You also can have Isis display the first return of the bottom track. You use the Overlay function of the View menu to display or suppress the additional information that may be present in your imagery. Figure 8-4 shows the dialog box you get when you choose Overlay.
June 2004 Isis® Sonar User's Manual, Volume1 124 As can be seen in Figure 8-4, you can set up ADDS Support from the Set_up button of the Overlay dialog box. This ADDS Support dialog box is the same one accessible from the Configure menu. See 6.10, ‘Cue Boxes (Record/Playback),’ for a full discussion of ADDS Support. Note: If Saved contacts and polygons points are not enabled, then bookmarks will not be saved in the imagery.
June 2004 Isis® Sonar User's Manual, Volume1 8.4 125 Downsample In Isis, downsampling techniques can be used to compress many across-track imagery samples into a single pixel value for display. Such compression permits displaying a relatively large amount of data in the relatively limited space of a computer monitor. By carefully choosing an appropriate downsampling technique to match the type of data to be displayed, you can control the amount and type of detail you want to see in your imagery.
June 2004 Isis® Sonar User's Manual, Volume1 126 monitors side-by-side, providing a horizontal display area approximately 5000 pixels wide. But for the purposes of this discussion, 1000 will be used. In order to display, say, 20,000 sonar samples in a window 1000 pixels wide, some kind of downsampling must be done. In this example, only 20 samples would be available to Isis for representing the entire spectrum of 20,000 sonar samples (that is, 20,000 1000).
June 2004 Isis® Sonar User's Manual, Volume1 127 On computer systems having modest or perhaps marginal processing power, applying downsampling will visibly slow down the display rate, particularly during playback. Table 8-3 includes the relative performance rankings of the six downsampling techniques.
June 2004 Isis® Sonar User's Manual, Volume1 128 Table 8-3. The six downsampling methods in Isis Method What It Does (if 20 samples were used) Pros and Cons Average This setting takes 20 samples, The Average method is a good, sums them and divides by 20. In general-purpose downsampling the case of 16-bit data, the math technique; it does not emphasize happens as signed arithmetic. data in any particular way. Average is the third slowest (fourth fastest) method.
June 2004 Isis® Sonar User's Manual, Volume1 129 Of the 20 samples, Isis takes The Min downsample method is the minimum value to display. In useful when looking only for shadows the case of 16-bit data, the when there is a lot of background minimum magnitude (value least noise or clutter. However, strong from zero) is displayed to returns will be de-emphasized. Use preserve the signing of the data. of this technique is not generally recommended. Min is the second fastest downsample method.
June 2004 Isis® Sonar User's Manual, Volume1 8.5 130 Speed The Speed command allows you to specify Automatic towfish speed calculation by Isis or Manual speed entry. Towfish speed is used by Isis for geocoding and for rectilinear rendering if speed correction is activated in a Waterfall window. Figure 8-6: Towfish Speed dialog box Automatic Manual Filter speed Isis will use a speed received from the navigation computer, if available, or calculate a speed based on the change in position over time.
June 2004 Isis® Sonar User's Manual, Volume1 131 If you’re in Record mode and you select Manual speed in the Towfish Speed dialog box, this manual speed will immediately override any speed settings you may have specified elsewhere, such as in your navigation template. Whichever kind of speed you select here — automatic or manual — will be displayed in the Telemetry box of the Parameter Status window. 8.
June 2004 Isis® Sonar User's Manual, Volume1 132 Unless you are sending a true towfish position to Isis during data acquisition, you need to account for the difference between the ship's reference position and the towfish position. This can be achieved using the View→Layback option in Isis, which will write a layback value into your XTF file either based on your estimate of the values or by reading serial data from a cable counter sensor and the towfish depth sensor.
June 2004 Isis® Sonar User's Manual, Volume1 133 Definitions of terms used to describe the relationships of various distances depicted in Figure 8-8 are: Offset: Height of Towpoint: Cable Out: Fish Depth: Layback: 8.7.1 a fixed value equal to the distance between the towpoint and the navigation antenna or ship’s reference point, entered manually. a fixed value equal to the height of the towpoint above water level, entered manually.
June 2004 Isis® Sonar User's Manual, Volume1 134 Figure 8-9: Layback Correction dialog box — before new layback done In the example, Isis is applying a total layback of 151.28 m to the navigation data. The value 151.28 could be coming from an external computer (via a serial port), or it could have been calculated by Isis.
June 2004 Isis® Sonar User's Manual, Volume1 135 Figure 8-10: Layback entered manually changed current value In Record Mode the new, entered value of 177.00 m, is the one written to the .XTF file. In Playback Mode, the Current value is the value applied to the position in a mosaicking session, or to a Target or TargetPro position. Note that entering a value here would not modify the original value in the .XTF file.
June 2004 Isis® Sonar User's Manual, Volume1 136 To Calculate Layback from Cable Out and Other Parameters by entering values manually Clicking the radio button Compute layback from Cable Out allows the operator some further options: Figure 8-11: New manually entered layback values — example Chapter 8: Using the View Menu
June 2004 Isis® Sonar User's Manual, Volume1 137 In this example, all values have been entered manually. Note that the Cable Out and Depth checkboxes are checked, allowing manual entry of these values. Height of towpoint and Offset values have also been entered. Clicking Apply causes Isis to use these values to make the layback calculation and to display the value in the Current value panel. In Record Mode these values are written to the .XTF file.
June 2004 Isis® Sonar User's Manual, Volume1 Figure 8-12: Layback automatically computed; current value updated Chapter 8: Using the View Menu 138
June 2004 Isis® Sonar User's Manual, Volume1 139 Notes: • In the example shown in Figure 8-12, the values for Cable Out and Depth (arrowed), are being received in real time over a serial port. As these values change, the display updates automatically. The fact that they appear “grayed out” does not mean that the values are incorrect, simply that they cannot be changed by the operator. • Checking the box alongside either Cable Out or Depth allows the operator to override the automatic value.
June 2004 Isis® Sonar User's Manual, Volume1 Figure 8-13: Layback as percent of cable out Chapter 8: Using the View Menu 140
June 2004 Isis® Sonar User's Manual, Volume1 141 In the example shown in Figure 8-13, a percentage of 80 is being applied to an incoming value of 94.00 m from the cable-counter data via the serial port. Notes: • Depth is no longer an option in this mode. Instead, the operator enters an estimate of the percentage of cable out and clicks Apply.
June 2004 Isis® Sonar User's Manual, Volume1 142 Figure 8-14: Trackpoint-enabled layback correction method The two methods of computing the towfish position are mutually exclusive. That is, enabling the Trackpoint option disables the Layback/Cable method and vice versa. Both types of data may be recorded in the .XTF file. The user chooses which method to apply in the Layback Correction dialog box. • Current Delta X: The X-offset (East or West) in meters from the Trackpoint head to the towfish.
June 2004 Isis® Sonar User's Manual, Volume1 143 To use the Trackpoint option in Isis, the Trackpoint system must be interfaced to the vessel’s gyrocompass and provide Isis with true E-W (X-offsets) and N-S (Y-offsets). Isis cannot make these calculations. In general, the best way to interface this type of acoustical tracking device is to use a dedicated navigation computer, which has the output of this computer going directly to Isis. This kind of connection provides a true towfish position to Isis. 8.
June 2004 Isis® Sonar User's Manual, Volume1 8.9 144 Mark Event This function is available only while you are recording data. During a recording session, when you see something you want to mark for future reference, you use Mark Event to mark the area as it is being recorded. Isis then records a red line in your data, across-track, to make it easier for you to find the area later during playback. To mark an event interactively 1. Start your recording session. 2.
June 2004 Isis® Sonar User's Manual, Volume1 145 3. From the main menu of Isis, choose View→Saved Raw Serial Data. The system displays the Saved Raw Serial Data viewing box with data in it. Figure 8-16 shows an example of this phenomenon. To view saved raw serial data that had been saved at recording time 1. From the main menu of Isis, choose View→Saved Raw Serial Data. The system displays the Saved Raw Serial Data dialog box. Figure 8-16 shows an example of this.
June 2004 Isis® Sonar User's Manual, Volume1 146 Chapter 9 Using the Tools Menu You use the Tools menu to set up and run the Target utility, to test your COM ports, to apply a spatial filter to your imagery, to clean up beam patterns from your imagery, to get telemetry data from your data imagery, to selectively save parts of a file, or to track a pipeline. This chapter explains the functions found in the Tools menu. To access the Tools menu, do the following: 1.
June 2004 Isis® Sonar User's Manual, Volume1 9.1 147 Target The Target command runs the Target utility for feature mensuration, logging and recall. If the program is already running when Target is selected from the Isis Tools menu, the Target utility becomes the active Windows application. Target is also initiated if you position the cursor over a Waterfall window and double-left-click.
June 2004 Isis® Sonar User's Manual, Volume1 148 Figure 9-2: Target Setup dialog box, with defaults shown In the Target Setup dialog box, Automatic, prefer TargetPro.exe means that Isis will first try to start TargetPro. If Isis can’t run targetpro.exe, then it will try to start the old Target (target.exe). The other two options force Isis to start just one or the other version of Target, with no “fallback” option.
June 2004 Isis® Sonar User's Manual, Volume1 9.3 149 Digitizing Lines and Polygons You use the Digitize Lines and Polygons function to define points in your data stream that can form lines and polygons. Isis saves the defined points as quantitative data in an ASCII file. You can then use the output file as input to other applications outside of Isis, such as a spreadsheet program, an AutoCAD program, or as a layer in a project of a DelphMap program.
June 2004 Isis® Sonar User's Manual, Volume1 150 If you use (enable) slant range, make sure the seafloor bottom is being tracked correctly. Otherwise, you might not get acceptable results in your displayed imagery. See 10.7.2 (‘Bottom Track and TVG’). 9.3.1 Setting Up to Digitize Lines or Polygons Before recording or playing back data, you can specify ahead of time the file names and descriptors you wish to associate with the data imagery.
June 2004 Isis® Sonar User's Manual, Volume1 151 Figure 9-3: Initial Digitize Lines and Polygons dialog (expanded to More Options) Chapter 9: Using the Tools Menu
June 2004 Isis® Sonar User's Manual, Volume1 152 You are now ready to fill out a description list table for the data you will be recording or playing back. 9.3.2 Providing a Description List Table There's nothing in Isis that requires you to fill out a description list table; it's merely an organizational tool for helping you keep track of whatever sets of points you wish to associate with whatever kind of data you are acquiring. To fill out a description list table 1.
June 2004 Isis® Sonar User's Manual, Volume1 153 Figure 9-4: A typical Edit Descriptions list, partially completed 4. Type your descriptive entries for the sets of points you will be saving. You do not have to fill out all 32 line items.
June 2004 Isis® Sonar User's Manual, Volume1 154 the name of the feature or area that will be tagged and logged, and the file names that contain the feature or area. The sample table shown above shows such a scheme. Deciding on, and using, a method such as this makes it much easier to find the saved points later, after you have finished conducting your data survey. 5. Click OK. 6. Isis closes the Edit Descriptions dialog box and makes the Digitize Lines and Polygons dialog box the active window.
June 2004 Isis® Sonar User's Manual, Volume1 9.3.4 155 Tracking Points Manually The manual method of tracking points gives you precise control over the placement of points in your imagery. It is a good method to use if you have highly irregular or non-linear features that you wish to log as points. To manually track points 1. Choose Manual in the Automatic tracking (linear features) area of the Digitize Lines and Polygons dialog box. 2.
June 2004 Isis® Sonar User's Manual, Volume1 156 If navigation data area present, they are listed also. A sample screen with a polygon tagged for data collection is shown in Figure 9-5. Figure 9-5: Polygon drawn on imagery using Digitize Lines and Polygons 9.3.5 Tracking Points Semi-Automatically The semi-automatic method of tracking points is a compromise between speed and precision.
June 2004 Isis® Sonar User's Manual, Volume1 157 you want to track points of just a portion of a linear feature (not the entire linear feature). To semi-automatically track points 1. In the Automatic tracking (linear features) area of the Digitize Lines and Polygons dialog box, choose Semi-automatic. 2. Place your pointer at a location in your imagery where you want the tracking to begin. 3. Hold down the ALT key and left-click with the trackball or mouse.
June 2004 Isis® Sonar User's Manual, Volume1 158 Automatic tracking begins. As with semi-automatic tracking, Isis: • • puts numbered markers at the plotted points in your imagery, connects the numbered markers with a line to show the tracked line, • adds points to the list of points in the dialog box. Unlike Semi-automatic tracking, Isis continues to track points as long as your waterfall is not paused or until it reaches the end of file (whichever comes first).
June 2004 Isis® Sonar User's Manual, Volume1 159 3. For the Description File text box, click Set and specify a file to contain the header and value labels you typed in step #2. The values you typed will appear as headers above the columns of the ASCII file you specified, if you specified one.
June 2004 Isis® Sonar User's Manual, Volume1 160 To send the tracked points to Target and/or an ASCII file 1. After you collect all points and lines for logging in an ASCII file, verify the following: • Is the currently displayed description in the Description text box the one you want associated with this set of points? If you need to, choose a different description from the drop-down text box (or choose Edit Descriptions and edit or modify the description).
June 2004 Isis® Sonar User's Manual, Volume1 161 4. For each feature’s set of points you have collected, be sure to click Log Now if you intend to save the points either in Target or in an ASCII file you specify (or both ways). The data are saved in the named ASCII file. Figure 9-7 shows an example of such a file.
June 2004 Isis® Sonar User's Manual, Volume1 162 Figure 9-6: Examples of points entered in the Digitize Lines and Polygons dialog Chapter 9: Using the Tools Menu
June 2004 Isis® Sonar User's Manual, Volume1 163 Figure 9-7: Sample ASCII report generated by Digitize Lines and Polygons 9.4 Coverage Map and Mosaic Choosing Coverage Map and Mosaic from the Tools menu provides a way to make a visual map of a data survey and, optionally, of sensor coverage. When active, the coverage map window updates each time the sensor’s navigation position changes. You can make coverage maps in Record or Playback mode; the coverage map display behaves identically in each mode.
June 2004 Isis® Sonar User's Manual, Volume1 164 summarizes the older, traditional coverage method technique. You can still use the older method if you wish, in which case the second part of this guide is applicable. To choose a coverage map method 1. From the main menu, choose Tools→Coverage Map and Mosaic . The system displays the Coverage Map and Mosaic dialog box. Figure 9-8 shows different views of this dialog box when different options have been enabled there.
June 2004 Isis® Sonar User's Manual, Volume1 165 2. Pick one of three available methods to use: • Coverage Map only — This is the default; it quickly makes a coverage map but does not make a mosaic; the resulting coverage map cannot be used outside of Isis. • Preview Mosaic with Coverage Map (NT/2000 only) — This makes a mosaic, but no overlays or GIS options are available. • Full Delph Map Mosaic — This makes a fully processed mosaic.
June 2004 Isis® Sonar User's Manual, Volume1 166 3. When you are ready click Save so that Isis keeps these settings. 4. Press to pause the playback of the file, and then the [Home] key to backup to the beginning of the file. Enter the resolution, projection and filename 1. Click on Tools→Coverage Map and Mosaic, then select the option Full DelphMap Mosaic. Note: At this point you have the option of starting DelphMap by checking the appropriate box.
June 2004 Isis® Sonar User's Manual, Volume1 167 Figure 9-9: Unchecked ‘UseNav’ option in Delph Mosaic and DTM 4. Click Set Projection and Bounding Box. At a minimum you should enter the Resolution and check that the values displayed in the Input and Output projection boxes are correct for your data. For example, if your XTF file has navigation in Lat/Long, then the Input projection will be Not Projected (Longitude, Latitude), and the Output projection will default to the appropriate UTM zone.
June 2004 Isis® Sonar User's Manual, Volume1 168 5. When you are through with the Set Projection and Bounding Box, click OK to dismiss it. Create the mosaic 1. Check the box Build Sidescan Mosaic, then click Start Mosaic. A standard Save As dialog box opens. 2. In the Save As dialog box select the name of the mosaic file and its location (you do not need to add the DDS_VIF extension) and click Save. 3.
June 2004 Isis® Sonar User's Manual, Volume1 169 Replay the data to extract the navigation data 1. Start Isis and open the Coverage Map and Mosaic Window under the Tools menu. 2. Select the third option (Full DelphMap Mosaic), remove the check mark from the Start DelphMap to display mosaic box, and click OK. Both the Coverage Map and the Delph Mosaic and DTM dialog boxes open. 3.
June 2004 Isis® Sonar User's Manual, Volume1 170 4. Replay the line you wish to mosaic. The coverage map starts to fill, showing which line has been replayed. No mosaic data is being written at this time. While this happening, you can use the TVG menu to find the settings that give the best imagery results in the Isis waterfall display. At this time you may also want to verify that the bottom has been tracked correctly.
June 2004 Isis® Sonar User's Manual, Volume1 171 Do not click STOP in Isis! Create the empty matrix file 1. In the Delph Mosaic and DTM dialog box, click Set Projection and Bounding Box. At a minimum you should enter the Resolution and verify that the values displayed in the Input and Output projection boxes are correct for your data.
June 2004 Isis® Sonar User's Manual, Volume1 172 You might want to position the Coverage Map and Delph Mosaic boxes so they are both visible (not overlapping). Fill the matrix file with the sonar imagery 1. Press [Home] to return to the start of the line. The data starts replaying and filling the empty matrix with the data shown in the Isis waterfall display. 2.
June 2004 Isis® Sonar User's Manual, Volume1 173 saved in 8, 16, 24, and 32-bit modes, both in TIFF and DDS_VIF formats. To use this method you must have a sentinel that is enabled for this function and for DelphMap (2.7 or later). To preview a mosaic in Isis 1. From the Tools Menu choose Coverage Map and Mosaic. The system displays the Coverage Map and Mosaic dialog box (Figure 9-8). 2. Click Preview mosaic with coverage map (NT/2000 only). 3. Click OK.
June 2004 Isis® Sonar User's Manual, Volume1 174 Figure 9-11: Preview Mosaic dialog box As the imagery scrolls in the Isis main window, the mosaic is created in a separate Coverage Window.
June 2004 Isis® Sonar User's Manual, Volume1 175 To save a previewed mosaic 1. From the Coverage Window that contains the displayed preview mosaic, choose Mosaic/DTM. The system displays the Save Preview Mosaic dialog box (Figure 9-12). Figure 9-12: Save Preview Mosaic dialog box 2. Choose either Save as TIFF (GeoTIFF) or Save as DelphMap DDS_VIF file. 3. Click Save Now then Close. The file is saved in the specified format.
June 2004 Isis® Sonar User's Manual, Volume1 9.5 176 Real-Time BathyPro Map If your Sentinel dongle that supports your version of Isis has been enabled for Bathy Pro (version 1.2 or later) and DelphMap (version 2.7 or later), you can use Isis as an entry point to run BathyPro and have BathyPro create a real-time digital terrain mosaic (DTM) from your multibeam bathymetry and display your DTM in DelphMap. To access the real-time BathyPro function from Isis 1.
June 2004 Isis® Sonar User's Manual, Volume1 Figure 9-13: Bathypro Real Time dialog box Chapter 9: Using the Tools Menu 177
June 2004 Isis® Sonar User's Manual, Volume1 178 To understand how to work with the BathyPro Real Time dialog box and create a DTM, please refer to the technical manual, Using BathyPro, from Triton Elics International, for details on creating a DTM from within BathyPro and displaying it in DelphMap. 9.6 Com Port Test The Com Port Test allows you to see what is being received at the COM ports. When Com Port Test is selected from the Tools menu, a dialog box is displayed.
June 2004 Isis® Sonar User's Manual, Volume1 179 off despeckle focus fill echoes smooth image suppress noise Figure 9-14: Composite example of different filter effects in imagery Chapter 9: Using the Tools Menu
June 2004 Isis® Sonar User's Manual, Volume1 180 Figure 9-15: Sweep and Run Continuously Spatial Filter dialog boxes For either filter mode you can apply built-in, standard filters or custom filters. Using standard filters are covered in 9.7.1, ‘Applying Standard Filters’; custom filters are covered in 9.7.2, ‘Creating and Applying Custom Filters’. Each of the options available in the two filter modes is explained in Table 9-1.
June 2004 Isis® Sonar User's Manual, Volume1 181 Table 9-1. Options for Sweep and Run Continuously Spatial Filter Apply Filter Choose Sweep Image mode to sweep a filter once over a displayed image. The scrolled image pauses automatically when a swept filter is applied. The sweep function is not supported if your display is configured for more than 256 colors! Choose Run Continuously mode to apply a filter to imagery as it scrolls in a Waterfall window.
June 2004 Isis® Sonar User's Manual, Volume1 Filter (continued) 182 Focus: This is a convolution filter. It uses the kernel of the size that you specify shown in Table 9-3 and operates on an array of pixels of the same size in order to determine the value of the center pixel. The dot product of the two arrays is divided by 8 and subtracted from the original pixel value. The dot product is the sum of the products of corresponding elements in the two arrays.
183 June 2004 Isis® Sonar User's Manual, Volume1 Table 9-2. Median order for 3 filters in 2 pixel array sizes Filter 3 by 3 Kernel 5 by 5 Kernel Suppress Noise 2 5 Smooth Image 5 11 Fill Echoes 8 17 Table 9-3 is a summary of the kernels that are used for each of the convolution filters. Table 9-3.
184 June 2004 Isis® Sonar User's Manual, Volume1 Vertical Right 9.7.1 -1 0 1 2 1 0 1 0 1 -1 -2 -1 -1 -1 -1 1 1 1 1 1 -2 -2 -1 1 2 2 2 1 1 0 0 0 0 1 0 0 2 2 1 -1 -2 -2 -2 -1 1 1 1 -1 -1 -1 -1 -1 Applying Standard Filters Standard kernel sizes of 3X3 and 5X5 are available for either spatial filter mode (Sweep image or Run continuously). To create a non-standard 3X3 or 5X5 kernel, refer to 9.7.2, ‘Creating and Applying Custom Filters’. To apply a standard filter to your imagery 1. 2. 3. 4. 5.
June 2004 Isis® Sonar User's Manual, Volume1 185 give you a wide range of flexibility over the effects you can impose on your imagery. Only one custom filter per Isis session may be defined. You can create kernels in odd-dimensioned arrays of 1X1 up to 15X15; they need not be square. Each element of kernel data is a signed byte, so kernel elements can have values from -128 to +127. To specify a custom filter and apply it to your imagery 1. Play back the imagery to which you wish to apply a spatial filter.
June 2004 Isis® Sonar User's Manual, Volume1 186 In the work area window you can do any of the following: • Specify a kernel size by using the up and down arrows on the matrix indicator. • Type one or more values for any of the positions in the kernel. If fewer elements are specified than are indicated by the kernel dimensions, the omitted elements will be set to zero. If more elements are specified than indicated, they will be ignored.
June 2004 Isis® Sonar User's Manual, Volume1 9.8.1 187 Overview After sonar imagery has been corrected for slant-range distortion and the water column has been removed, prominent across-track variations in signal intensity generally remain in the imagery. These variations result in trackparallel stripes of high and low intensity, commonly referred to as beam pattern. You can use Isis to eliminate, to a large degree, the unwanted beam pattern that sometimes appears in your imagery.
June 2004 Isis® Sonar User's Manual, Volume1 188 stored and read by Isis as beam patterns from which compensations are created while Isis is running. Refer to Appendix B for a description of the BAC file format. If no calibration patterns are available, Isis can derive an empirical BAC from statistics collected over at least several hundred pings. This is generally the approach taken since transducer beam patterns are rarely available.
June 2004 Isis® Sonar User's Manual, Volume1 189 during the collection of statistics and during the entire survey for which grazing angle compensation is applied. It is important to realize that Isis will only calculate a GAC outside of boresite since distortions inside of boresite are dominated by effects of the beam pattern. If, therefore, due to the ping rate and the tilt angle of the sonar, boresite falls outside of the collected statistics for the GAC, the compensation will be completely flat.
June 2004 Isis® Sonar User's Manual, Volume1 190 Figure 9-17: Beam/grazing angle compensation dialog box (Full Level) In the figure, the green line (the higher line) represents data coming from the starboard channel, and the red line (lower line) represents data coming from the port channel. To understand the color coding of any additional channels that may be present in your data, click Color key... to reveal the color schemes.
June 2004 Isis® Sonar User's Manual, Volume1 191 angle compensation and what you will see in your imagery. Although the operational levels are not labeled as Basic, Middle, and Full in the dialog box, you use the dialog box’s Options button to choose a level you want. You then choose Do It to have Isis use your chosen options for the level you selected. 9.8.4.1 Working at the Basic Level of Compensation Basic level provides you with the most automated way of deriving angle compensation.
June 2004 Isis® Sonar User's Manual, Volume1 9.8.4.2 192 Working at the Middle Level of Compensation Middle level gives you more control than basic level but not as much control as full level in the task of collecting statistics and calculating a beam angle compensation. To acquire angle compensation from the middle level 1. 2. 3. 4. Click in a waterfall window. Choose the Beam Angle, Grazing Angle dialog box from the Tools menu. Click Options once. Choose Collect Statistics or Correct Image or Off.
June 2004 Isis® Sonar User's Manual, Volume1 9.8.4.3 193 Working at the Full Level of Compensation Full level gives you the most control over angle compensation. It is also the only level that gives you access to grazing angle compensations. It is strongly recommended that beam angle compensation be applied prior to the application of any grazing angle compensation. Apply Grazing Angle compensation after Beam Angle compensation has been applied. To acquire angle compensation from the full level 1.
June 2004 Isis® Sonar User's Manual, Volume1 194 Table 9-4. Options for Beam Angle Compensation Collect Statistics, Correct Image, and Off Compensation These are the same for full level as they are for middle level (see ‘Working at the Middle Level of Compensation’ on page 191). Choose between Beam Pattern (Beam Angle) and Grazing Angle compensations. Across-Track Slope In order to calculate accurate beam angle and grazing angle compensations, the across-track slope must be specified.
June 2004 Isis® Sonar User's Manual, Volume1 195 Color Key The Color Key button displays a box indicating the color assignments for graph traces displayed in the Beam Angle / Grazing Angle dialog box. Beam Width Enter the 3 dB beam width of the current sonar. Isis will use this information for extrapolating the BAC and GAC at far ranges where collected statistics are sparse. Tilt Angle Enter the transducer tilt angle for the current sonar.
June 2004 Isis® Sonar User's Manual, Volume1 9.8.5.2 196 Status The Status box displays the current status of the BAC and GAC routine as well as the minimum and maximum altitudes that have been encountered during collection of statistics. After you choose Do it, the status will change during the automatic application of BAC. If a No Altitude message is displayed, Isis cannot find an altitude to use for creating a compensation. To correct this: 1.
June 2004 Isis® Sonar User's Manual, Volume1 197 Figure 9-18: The initial ASCII Report dialog box To set up one or more report forms 1. In the ASCII Report dialog box (Figure 9-18) put a check mark in one or more of the available numbered forms to enable the corresponding Setup Form button(s). The default is to have nothing checked (and therefore no report form active). 2. Click a Setup Form enabled by your check mark.
June 2004 Isis® Sonar User's Manual, Volume1 198 Figure 9-19: A typical Report Form dialog box before choices have been OK’d Chapter 9: Using the Tools Menu
June 2004 Isis® Sonar User's Manual, Volume1 199 3. Input selections. These are grouped under the Items to Print area on the left side of the box. Select the types of information you wish to log by putting check marks in boxes of interest. As you make your selections, the system keeps track of your selection order. You can select any or all inputs. The default is to have nothing checked.
June 2004 Isis® Sonar User's Manual, Volume1 200 9.10 Output Telemetry Isis can extract and output telemetry data from your imagery and put the extracted data in a serial port, an ASCII log file, or both. You can do this in Playback mode or in Record mode. You have a choice of two formats: SIS-1000 (or SIS-7000) or Generic format. • In SIS-1000 format, the data output to the serial port and/or file is a close reconstruction of the original serial string supplied by the SIS-1000 in record mode.
June 2004 Isis® Sonar User's Manual, Volume1 201 Table 9-5. Sample serial port output extracted from telemetry Record Record’s Contents 1 47.6684800 -122.2358300 10.4 -4.96 +3.82 3.39 32.7 9.1 90.0 +59.20 +0.00 +0.00 +0.00 +0.00 +0.00 0 0.000000 0.000000 0.000000 47.6684800 -122.2358300 9.3 -4.07 +3.82 3.39 32.6 9.1 90.0 +59.20 +0.00 +0.00 +0.00 +0.00 +0.00 0 0.000000 0.00 0.000000 0.
June 2004 Isis® Sonar User's Manual, Volume1 202 Table 9-6. Sample file output extracted from telemetry Record Record’s Contents 1 24 JUL 1995 01:01:35.44 47.6619967 -122.2421417 13.7 -6.10 +1.71 4.50 33.4 8.0 90.0 +31.20 +0.00 +0.00 +0.00 +0.00 +0.00 0 0.000000 0.000000 0.000000 2 24 JUL 1995 01:01:35.88 47.6619967 -122.2421417 13.1 -6.35 +1.46 4.50 33.4 8.0 90.0 +31.20 +0.00 +0.00 +0.00 +0.00 +0.00 0 0.000000 0.000000 0.000000 9.10.
June 2004 Isis® Sonar User's Manual, Volume1 203 {TELEMOUT} (Refer to Figure 4-6 for a full explanation of options available to you in that dialog box.) Data are output only on the selected serial port, which leaves the other serial port(s) available for data collection. Usually the data output are the same values that appear in the Parameter Display.
June 2004 Isis® Sonar User's Manual, Volume1 204 Figure 9-20: Output Telemetry dialog box 2. Choose SIS-1000 or SIS-7000 format if your telemetry output will be used by Benthos software or Generic if your telemetry output will be used by some other application. In SIS-1000 format, the data going to the serial port and/or file closely resemble the original serial string supplied by the SIS-1000 in record mode.
June 2004 Isis® Sonar User's Manual, Volume1 • 205 directly from your data imagery to the application that can accept and use your output. Output to Log File if your application will be using the telemetry output at some later time. This is an ASCII file. 9.11 Output XYZ If your bathymetry data imagery is in XTF format, the Output XYZ command copies the X, Y, and Z coordinates of your data imagery into an ASCII file that you name.
June 2004 Isis® Sonar User's Manual, Volume1 206 Figure 9-21: Output XYZ File dialog box To create an ASCII file for capturing XYZ coordinates as ASCII text 1. From the Output XYZ submenu of the Tools menu, choose Open File. The system displays a standard Windows Save As dialog box where you can name the ASCII file you wish to save. If you do not specify a directory in which to save your file, the system will save it in the same directory containing the XTF file you are running. 2. Choose OK.
June 2004 Isis® Sonar User's Manual, Volume1 207 its name appears in the File field. Also, the number of points (pixels) that are currently being saved appears in the Points field, and the current size of the open file appears in the File size field. As long as you do not choose Close File, the file will continue to collect your XYZ output. If you choose Close File, the system closes the file and stops displaying the file name in the File field.
June 2004 Isis® Sonar User's Manual, Volume1 208 The first column of data lists your northings (the X vector), the second column your eastings (the Y vector), and the third column shows your depth as measured from the Z vector offset you established when you set up your sonar in Isis. (See 4.1, ‘Sonar Setup’) 9.12 Snip File The Snip File command allows you to save some or all of one or more files in a single new file. If you choose Snip File, Isis displays a standard Windows Save As dialog box.
June 2004 Isis® Sonar User's Manual, Volume1 209 Note: For this module to work correctly, you must correctly set two important parameters: • • The sonar gain must be set such that the signals are not clipped. The bottom track option must be set up and operating properly (see 10.7.2, ‘Bottom Track and TVG’). To set up pipeline parameters 1. From the Tools menu choose Track Pipeline 2. Start playback (or recording) of data file in Isis.
June 2004 Isis® Sonar User's Manual, Volume1 210 Figure 9-23: Pipe Tracking Setup dialog box 4. Using the - or + selector, select the Channel which is in use (1=port, 2=starboard, etc.). 5. Specify the Pipe Diameter. This is always displayed in inches (in), but may be entered as meters (m), centimeters (cm) or millimeters (mm) by entering the units immediately after the number (for example, 25cm). 6. Click APPLY to accept the diameter and apply the conversion. 7.
June 2004 Isis® Sonar User's Manual, Volume1 211 9. At a minimum, the SPN file will always contain Time, Date, KP, and Fish Position. If additional sensors are required, check them in the Select Items to Log area of the dialog box. 10. Click APPLY again to make all your selections in this dialog box available for your pipe tracking session in Isis. 11. Close the Pipe Tracking Setup dialog box by clicking on the in the upper right corner of the dialog box. 9.13.
June 2004 Isis® Sonar User's Manual, Volume1 212 9. Once all settings are correct, click Start Logging to begin writing the SPN file. The Shadow Averaging Window can be used to smooth the response of the shadow tracking gate, making the tracked position more stable. However, setting this value too high may result in spans not being logged.
June 2004 Isis® Sonar User's Manual, Volume1 213 Figure 9-24: Typical Pipe Tracking output (on left) and dialog box (on right) 9.13.3 Understanding the SPN File The span file is a text file made up of lines of text referred to as records.
June 2004 Isis® Sonar User's Manual, Volume1 214 Figure 9-25: Typical contents of an SPN log file Various tokens can be associated with any of the SPN record types. SPN tokens appear near the top of SPN files. Figure 9-25 shows this. Some tokens are required (Table 9-7); others are optional (Table 9-8).
215 June 2004 Isis® Sonar User's Manual, Volume1 Table 9-7. Required tokens in an SPN file Token Meaning Valid Range or Units {DAY} Day [1,31] {MON} Month [1,12] {YRS} Year four digits {HRS} Hour [0,23] {MIN} Minute [0,59] {SEC} Second [0.0,60.0] {LAT} or {NTH} Latitude or Northing (degrees) +east/-west or meters {LON} or {EST} Longitude or Easting (degrees) +north/-south or meters Table 9-8.
June 2004 Isis® Sonar User's Manual, Volume1 216 9.14 Subbottom Picking and Tracking With Isis version 2.17 (both 16- and 32-bit versions) or later, Isis now supports interactive subbottom reflector picking and tracking (“SBP”) in both Record or Playback mode. In this context, a reflector is a generic term for anything that reflects sound. This can be the first return, subbottom layer, thermocline, etc. You can instruct Isis to correct the display of any subbottom channel for variations in towfish depth.
June 2004 Isis® Sonar User's Manual, Volume1 217 Figure 9-26: A typical Subbottom Picking and Tracking dialog box Chapter 9: Using the Tools Menu
June 2004 Isis® Sonar User's Manual, Volume1 218 3. Choose the following from the SBP dialog box: • Manual or Automatic • Reflector n (where n is one of the radio buttons 1 through 9; nominally 1). 4. Play back a file containing subbottom data (preferably a file with only a single channel of subbottom). If you are using only a single channel, the system automatically displays a vertically oriented signal (scope) display next to the subbottom window.
June 2004 Isis® Sonar User's Manual, Volume1 219 2. You can now begin picking another layer to track by CTRL left-clicking in the subbottom window. 3. Repeat this procedure for as many layers as you wish to track. 9.14.2 Tracking One or More Subbottom Layers To track a picked layer or layers means: • to have Isis trace the layer(s) while the imagery in your subbottom data window is scrolling, and • to have Isis save that data in an ASCII file that you specify.
June 2004 Isis® Sonar User's Manual, Volume1 220 Figure 9-27: Example of picked subbottom layers 9.14.3 Understanding the SBP Dialog Box All the functions found in the Subbottom Picking and Tracking dialog box are described in Table 9-9. The bold face headings that span all columns show subgroups of the dialog box.
June 2004 Isis® Sonar User's Manual, Volume1 221 Table 9-9. The Subbottom Picking and Tracking dialog box Function Name Possible Actions Effect of Actions Taken Tracking Suspend Click to darken or clear a numbered radio button. Manual Click to darken or clear a numbered radio button. Automatic Click to darken or clear a numbered radio button. Disables all picking, tracking and file operations (when button is dark) or enabled (when button is clear). The operator, not Isis, picks all reflectors.
June 2004 Isis® Sonar User's Manual, Volume1 Description • Click the Edit button –or– • Choose from drop-down box. Turn off reflector Click or don’t click the button. Erase reflector Click or don’t click the button. 222 For the Edit button: The system displays the Edit Description dialog box (the same one used by Digitize Lines and Polygons), where you can type 1 to 32 descriptions that you wish to assign to a set of reflectors you are tracking.
June 2004 Isis® Sonar User's Manual, Volume1 223 Input File View Click or don’t click the button. Set Click or don’t click the button. For future release. Will allow viewing playback file of tracked data. For future release. Will allow setting of file to play back tracked data. Close Close Click or don’t click the button. Closes the SBP dialog box. Reset Click or don’t click the button. Options Click or don’t click the button. Clears all SBP information not yet written to disk.
June 2004 Isis® Sonar User's Manual, Volume1 9.14.4 224 Understanding the SBP Output Options You can select or deselect the kind of data that will be saved to the ASCII output file during subbottom-tracking. To select or deselect data types to be saved to the SBP file 1. From the Subbottom Picking and Tracking dialog box (Tools→Subbottom Picking ), choose Options. The system displays the SBP Output Options dialog box. An example is shown in Figure 9-28.
June 2004 Isis® Sonar User's Manual, Volume1 225 2. Select or deselect the options you want and click OK. Table 9-10 describes the options found in the dialog box. Subgroups of the dialog box are shown in bold face headings that span all columns. Table 9-10. Output Options in Subbottom Picking and Tracking Function Name Possible Actions Effect of Actions Taken Store points based on (all choices can be inclusive) Check or uncheck the box. Isis records the subbottom data occurring at the event number.
June 2004 Isis® Sonar User's Manual, Volume1 226 Calculated from (mutually exclusive choices) Position Click to darken Calculates subbottom distance based on or clear a location (northings and eastings or lat./lon.) of numbered radio reflector in data stream. button. KP Click to darken Calculates subbottom distance based on or clear a kilometers of pipe tracked. numbered radio button.
June 2004 Isis® Sonar User's Manual, Volume1 Distance in Meters (m) 227 Check or Distance in meters (distance from sensor to uncheck the box. reflector) Distance in Check or Distance in Milliseconds (from sensor to Milliseconds uncheck the box. reflector) (ms) Space between columns Space between Type a number This specifies how many characters to assign columns in the box. to each reflector’s column in the output file.
June 2004 Isis® Sonar User's Manual, Volume1 228 Figure 9-29: Typical ASCII file generated by Subbottom Picking and Tracking 9.14.6 Operational Notes • You must have only one channel displayed in the window on which SBP is being performed. • You can use the Digitize Lines and Polygon function in conjunction with subbottom-tracking to generate both layer and feature lists. • Don’t enlarge or shrink size of the subbottom data window while performing SBP.
June 2004 Isis® Sonar User's Manual, Volume 1 Chapter 10 229 Using the Window Menu You use the Window menu to display different views of your data imagery and to adjust how the Isis software will present those views to you. This chapter explains the functions found in the Window menu. To access the Window menu 1. Load Isis from Windows by double-clicking the Isis icon. 2. Choose Window from the list of available menus. The system displays the Window menu.
June 2004 Isis® Sonar User's Manual, Volume 1 230 Horizontal lines in the list of Window submenus separate groups of things: • The top section lists window types (Waterfall, Wiggle, Signal, Bathymetry, Graph, and Text). Window subtypes (Across Waterfall, Down Waterfall, etc.) can be accessed from the arrows to the right of the listed window types. • The middle section contains window management commands (Orientation, Tile, etc.). These are the standard Windows commands for arranging the open windows.
June 2004 Isis® Sonar User's Manual, Volume 1 Figure 10-2: Waterfall Display dialog box Table 10-1 lists and explains the parameters.
June 2004 Isis® Sonar User's Manual, Volume 1 232 Table 10-1. Waterfall Display dialog box options Channel Display Specify the channel or channels to be displayed in this window. Waterfall windows will display all available channels by default. Selection boxes for unavailable channels are shaded. Any combination of the available channels can be selected. The Threshold slide bar allows you to adjust the level of Threshold contrast stretching.
June 2004 Isis® Sonar User's Manual, Volume 1 233 If you use (enable) slant range, make sure the seafloor bottom is being tracked correctly. Otherwise, you might not get acceptable results in your displayed imagery. See 10.7.2 (“Bottom Track and TVG”on page 258). 10.1.1 Down In the Down subtype, imagery scrolls from top to bottom and is called a vertical waterfall. This is the default in Isis. 10.1.
June 2004 Isis® Sonar User's Manual, Volume 1 234 10.2 Wiggle Wiggle windows display a single trace for each ping or pulse of a single channel of data. Wiggle windows are ideal for displaying subbottom data. The two Wiggle window subtypes are 2-D and 3-D. 10.2.1 Wiggle in 2-D A 2-D Wiggle window scrolls from right to left, adding traces at the right side of the window. Two-way travel time increases toward the bottom of the window. A sample screen is shown in Figure 10-3.
June 2004 Isis® Sonar User's Manual, Volume 1 235 Figure 10-3: Sample Wiggle 2-D waterfall window (left) and its dialog box (right) Chapter 10: Using the Window Menu
June 2004 Isis® Sonar User's Manual, Volume 1 236 The 2-D Wiggle Display dialog box displays the parameters you get when you have a common (non-wiggle) waterfall imagery scrolling on your screen (Figure 10-2), but the 2-D Wiggle Display dialog box adds a few more parameters (Table 10-2). Table 10-2. Additional waterfall parameters for 2-D wiggle imagery Channel Display Amplitude Filter Trace Offset Color Display Type A single channel can be displayed in each Wiggle window.
June 2004 Isis® Sonar User's Manual, Volume 1 10.2.2 237 Wiggle in 3-D A 3-D Wiggle window displays horizontal traces of signal intensity with positive or greater intensity up. When you have a scrolling 3-D imagery, right-click over the imagery to get its dialog box. A 3-D imagery sample and its dialog box is shown in Figure 10-4.
June 2004 Isis® Sonar User's Manual, Volume 1 238 All the parameters shown in the 2-D Wiggle Display dialog box also appear in the 3-D Wiggle Display dialog box. In addition, you can set the 3-D Wiggle direction to simulate a view away from or toward the sonar, respectively. Two-way travel time increases from left to right or from right to left across the window, depending on the channel type (port or starboard) and scrolling direction. 10.
June 2004 Isis® Sonar User's Manual, Volume 1 239 To adjust any of the display settings for this graph, press the right trackball button. The displays a dialog box, shown in Figure 10-6.
June 2004 Isis® Sonar User's Manual, Volume 1 240 Table 10-3 explains the options available to you in the Voltage Display dialog box. Table 10-3. Voltage display parameters Select Channel When you open a Voltage window, the first available channel is displayed by default. Clicking in the selection boxes toggles channels on and off for the Voltage window. Any number of available channels can be displayed. Select a color for the signal line and one for the background. Color Each color can be bright or dim.
June 2004 Isis® Sonar User's Manual, Volume 1 241 10.4 Multibeam Bathymetry If you use multibeam type of sonar, you can use the Isis Multibeam Bathymetry menu to get different views of your bathymetry data: View 2D and Scrolling 3D, Waterfall Intensity, and Beam Snippet Intensity (the latter applies to Reson sonars only). Snippet data can be logged. Also see ‘Beam Snippet Intensity’ for additional information on the subject. 10.4.
June 2004 Isis® Sonar User's Manual, Volume 1 242 To adjust any of the display settings for this graph, right-click in this window. The system presents a dialog box (Figure 10-8). The Bathymetry Confidence function shown in that dialog box also can be accessed from Window→ Status and Control→ Bathymetry Confidence. For a discussion of that function, see the section entitled ‘10.7.8 Bathymetry Confidence’.
June 2004 Isis® Sonar User's Manual, Volume 1 10.4.2 243 Scrolling 3D For a three-dimensional view of your multibeam’s image, choose Scrolling 3D. The width of the viewed image is twice your water depth. A sample graph and its controlling dialog box is shown in Figure 10-9. Figure 10-9: Color 3-D Display Settings dialog box, expanded to show shoaling To adjust any of the display settings in the 3D image, right-click in the 3D image window.
June 2004 Isis® Sonar User's Manual, Volume 1 10.4.3 244 True 3-D (Open GL) This is an alternative method of displaying your data in 3-D (Window→Multibeam Bathymetry→True 3-D (Open GL)). Figure 10-10: True 3D gridded, or color shaded image of the bathymetry data, as it plays in real-time or playback mode Right-clicking on the window gives the display settings that can be set for the window.
June 2004 Isis® Sonar User's Manual, Volume 1 245 Figure 10-11: Bathymetry True 3-D Display Settings Select Channels: usually just one head for multibeam; head #2 can be set when surveying with a dual-head multibeam sonar. Correct for: Data - telemetry from sensors or offsets from sonar set-up are applied to correct multibeam data. • Attitude: Pitch and Roll values from telemetry sensors are applied to data. • Heave: Heave motion of fish or vessel is applied.
June 2004 Isis® Sonar User's Manual, Volume 1 246 Checking Band downsizes the color palette to 10 colors from 32 (True Color). Two options for displaying the color palette exist: ‘Cyclic’ or ‘Static’: • Cyclic Range: Set color scale change value. If set to 1m, every meter equals a color. The colors will continue to cycle through the palette with increasing depth. Usually set by determining extent of depth range divided by 10. • Static Range: Set min. and max. values for the color palette.
June 2004 Isis® Sonar User's Manual, Volume 1 247 Show Geo Cursor: Used to identify the beam, swath, depth, and quality of a specific beam. Values are displayed in upper-right corner of window. Hint: Make sure the hardware acceleration in the computer properties window is set to low. Number of depth dots to display: This is the percentage from the inner beams outward to display in window.
June 2004 Isis® Sonar User's Manual, Volume 1 248 Also, in this window is a “Data Range” that shows the Min and Max depths that have been scrolled through the window. As data continues to scroll through the window it will update these values when deeper/shoaler depths are encountered, but it will not increase the minimum depth nor decrease the maximum depth. This feature is useful, as once an entire file has been played back, this window will give you the entire extent of the data range for that file.
June 2004 Isis® Sonar User's Manual, Volume 1 Figure 10-13: Waterfall (Multibeam) Intensity example Chapter 10: Using the Window Menu 249
June 2004 Isis® Sonar User's Manual, Volume 1 250 Right-clicking in the Multibeam Intensity window summons the standard Waterfall Display dialog box (Figure 10-2), where you can make certain adjustments to change the look of the imagery. 10.4.5 Beam Snippet Intensity This Multibeam Bathymetry function, accessible from Window→Multibeam Bathymetry→Beam Snippet Intensity, can display and log Reson snippet data.
June 2004 Isis® Sonar User's Manual, Volume 1 251 10.5 Echo Strength The Echo Strength display is not generally available to most Isis users. Echo Strength displays data saved in a very specific XTF format received from an EMG-2 input device. Echo Strength recreates a facsimile of a paper-chart representation of subsea acoustic reflectivity data and displays it on the Isis screen (Figure 10-14).
June 2004 Isis® Sonar User's Manual, Volume 1 252 Figure 10-15: Typical EchoStrength Status Values The topmost part of the EchoStrength Display dialog box (Figure 10-15) contains a graph of altitude, depth and total water depth. The range of the graph is set by right-clicking in the window.
June 2004 Isis® Sonar User's Manual, Volume 1 253 color-coded, with the color-code values also displayed in the right-click setup dialog box. 10.6 Graph Isis can graph many aspects of your towfish, navigation, telemetry, auxiliary, magnetometer, and CTD data. Graphed data give you an excellent way to see what kind of steps you might want to take to correct for a variety of conditions you might encounter in your data survey.
June 2004 Isis® Sonar User's Manual, Volume 1 10.6.2 254 Navigation A navigation graph helps you check to see if you are staying on (or straying off) your course. A sample image is shown next. Each vertical bar in the graph is 30 seconds apart. Choose Window→Graph→Navigation and right-click in the graph area to set up this kind of sensor graphing. A sample graph and its controlling dialog box is shown in Figure 10-17.
June 2004 Isis® Sonar User's Manual, Volume 1 10.6.3 255 Telemetry If you have a multibeam sonar, you can graph your telemetry data with Isis. Choose Window→Graph→Telemetry and right-click in the graph area to set up this kind of sensor graphing. A sample graph and its controlling dialog box are shown in Figure 10-18.
June 2004 Isis® Sonar User's Manual, Volume 1 10.6.4 256 Ship and Towfish When you need to graph your ship’s speed, your towfish’s speed, your ship’s gyroscope, or your towfish’s heading, choose Window→Graph→Ship and Towfish and right-click in the graph area to set up this kind of sensor graphing. A sample graph and its controlling dialog box are shown in Figure 10-19.
June 2004 Isis® Sonar User's Manual, Volume 1 10.6.5 257 Auxiliary Besides the built-in data-collecting functions of Isis, Isis can accept up to six auxiliary sensors to give you additional data-gathering capability. If you use auxiliary sensors, you can graph their data. You must have used one or more auxiliary sensors when you recorded your data imagery before an auxiliary sensors graph can be generated from Isis.
June 2004 Isis® Sonar User's Manual, Volume 1 10.6.6 258 Magnetometer Magnetic anomalies are often present and are sometimes unavoidable in areas you scan with your sonar. It is useful to correlate magnetic intensity of anything you might encounter with the imagery revealed by your sonar. Through a Magnetometer graph, Isis helps you see if this correlation is present and to what degree. Choose Window→Graph→Magnetometer and right-click in the graph area to set up this kind of sensor graphing.
June 2004 Isis® Sonar User's Manual, Volume 1 10.6.7 259 Computed CTD Because conductivity, turbidity, and density of water have such an important role in determining the velocity of sound in water, you may want to monitor these factors closely. Isis can help you do that with its Computed CTD graph. Choose Window→Graph→Computed CTD and right-click in the graph area to set up this kind of sensor graphing. A sample graph and its controlling dialog box is shown in Figure 10-22.
June 2004 Isis® Sonar User's Manual, Volume 1 10.6.8 260 Raw CTD Isis can, at any time during a playback session, get the raw CTD data from the file being played back if CTD data were present when the data was recorded. This could be useful if you felt that some part of your CTD data was questionable or worth re-examining. The Raw CTD graph in Isis could help you make that determination. Choose Window→Graph→Computed CTD and right-click in the graph area to set up this kind of sensor graphing.
June 2004 Isis® Sonar User's Manual, Volume 1 10.6.9 261 Set Scaling Ranges For any of the available graphs — main menu Window→Graph {Pitch, Roll, Heave | Navigation | Telemetry | Ship and Towfish | Auxiliary | Magnetometer | Computed CTD | Raw CTD} — you can change the graph’s scale. Changing the scale emphasizes or de-emphasizes the point-to-point movement in the graph’s plot.
June 2004 Isis® Sonar User's Manual, Volume 1 Figure 10-24: Graph affected by setting graph scales manually Chapter 10: Using the Window Menu 262
June 2004 Isis® Sonar User's Manual, Volume 1 263 Figure 10-25: Graph Bounds dialog box for setting graph scales manually 10.6.10 Clear Graph Between Data Gaps If some of your data is discontinuous (has one or more breaks someplace in the middle), you can have Isis reset your current graph displays to start plotting fresh again, from the point were the data resumes after the break in the data. Choose Window→Graph→Clear Graph Between Data Gaps to achieve this.
June 2004 Isis® Sonar User's Manual, Volume 1 264 10.7 Status and Control At any time during a recording or playback session, you can get information about the parameters, sensors, and data flow currently being collected, processed and/or displayed in the imagery windows. You can also create a banner of text to go along with your imagery. Text information is accessed from the Text submenu of the Window menu. 10.7.
June 2004 Isis® Sonar User's Manual, Volume 1 265 Table 10-4. Aspects of the Parameter Display dialog box Navigation (panel) Ship (panel) The most recent navigation fix. For geocoding purposes (see Cursor below), the positions are assumed to be towfish positions.
June 2004 Isis® Sonar User's Manual, Volume 1 266 Display Units Use this to specify whether your quantitative data will be displayed in meters, feet, or milliseconds. (panel) Log (button) Note (text box) Current File (panel) Switch (button) The Log button appends the core information currently displayed in this box to an ASCII file called CURSOR.LOG. Parameters logged are date, time, northing, easting, (or latitude and longitude), ping number, heading, channel, and range.
June 2004 Isis® Sonar User's Manual, Volume 1 267 Figure 10-27: Switch File dialog box To set up a switch file 1. Start your recording session (main menu: File→Start Recording). 2. Click on the Switch button in the Parameter Display dialog box. 3. Specify the path and name of the file you wish to switch to, but omit the extension. Depending on the data format that was selected in the Record Setup, Isis will add the appropriate file name extension (XTF, DAT, or SEG) to the file name you specify. 4.
June 2004 Isis® Sonar User's Manual, Volume 1 10.7.2 268 Bottom Track and TVG Because Isis can track the bottom to determine the towfish altitude, you can apply a time-varied gain (TVG) to each of the available channels. TVG is closely dependent on bottom tracking, since the variable TVG is applied after the water column is removed.
June 2004 Isis® Sonar User's Manual, Volume 1 269 towfish altitude, is displayed in meters in the Parameter Display dialog box and as a vertical white line in the Voltage window. If you use (enable) slant range, make sure the seafloor bottom is being tracked correctly. Otherwise, you might not get acceptable results in your displayed imagery. See 10.7.2 (“Bottom Track and TVG”). The parameters for the Bottom Track dialog box are explained in Table 10-5. Table 10-5.
June 2004 Isis® Sonar User's Manual, Volume 1 270 Clicking Options displays a dialog box (Figure 10-28) where you can save re-tracked altitude values. Enabling Save newly tracked altitude back is a feature that is especially useful in a case where the altitude either was not correctly tracked or not tracked at all. The primary towfish altitude should be used at all times. The Auxiliary towfish altitude option is a rarely used special option.
June 2004 Isis® Sonar User's Manual, Volume 1 271 Figure 10-29: TVG and Balance dialog box Time-varied gain is an increase in signal amplitude (gain) based on time so that the longer sonar returns (which are weaker in signal strength than nearby returns) will be proportionately compensated. The net result is that far-range images will display the same level of detail as near-range images. In Isis, the application of TVG is for display purposes only.
June 2004 Isis® Sonar User's Manual, Volume 1 272 Table 10-6. Options in the TVG and Balance dialog box Channel Moving the slider bar right or left increases or decreases, (slider bar) respectively, the number of channels to be affected by TVG. All (left-most position) is the default, meaning all available channels will be affected by your subsequent TVG actions.
June 2004 Isis® Sonar User's Manual, Volume 1 273 DC Offset Use this if you want to offset your signal voltage by an amount in (slider bar) the range 5V, in increments of 0.01V, before you apply TVG. This function appears in the “Custom” view of the TVG and Balance dialog box (right panel of Figure 10-26).
June 2004 Isis® Sonar User's Manual, Volume 1 10.7.4 274 Sensors The Sensors window gives you a snapshot of auxiliary sensor data for the file that is currently being saved or replayed. See 10.6.5 for details. If your data was recorded using an Elac Hydrostar (XSE) multibeam sonar, the pitch and roll values reported with the beam data are duplicated in the Isis variables AUX5 and AUX6 of the Sensor window, and heave value is assigned to AUX4.
June 2004 Isis® Sonar User's Manual, Volume 1 Figure 10-30: Sensor Display information window Chapter 10: Using the Window Menu 275
June 2004 Isis® Sonar User's Manual, Volume 1 276 Aspects of the Sensor Display information box are explained in Table 10-7. Table 10-7. Meaning of Sensor Display information box Event If you set an event marker in your data imagery, Isis keeps track of the marker. The event markers show up as numbers in the Sensor Display. Sensors Mag X, Y, Z: the strength of an object’s magnetism, measured in three dimensions. Field: the strength of magnetic field. Gravity: the force of gravity.
June 2004 Isis® Sonar User's Manual, Volume 1 277 Figure 10-31: Towfish Status dialog box 10.7.6 Banner To help identify the nature of the data imagery during playback or recording, you can create a banner that will be displayed above your data imagery as your data imagery is being played back or recorded. If you choose Banner from the Status and Control menu, Isis displays a generously sized box where you can type any text you want (as in the example shown in Figure 10-32).
June 2004 Isis® Sonar User's Manual, Volume 1 278 Figure 10-32: Sample Banner Text box for labeling data runs 10.7.7 Clock Times This is a visual aid to help you confirm that times are properly synchronized with your data. When you click Window→Status and Control→Clock times , Isis displays an informational box labeled Current Clock Values. A sample is shown in Figure 10-33.
June 2004 Isis® Sonar User's Manual, Volume 1 10.7.8 279 Bathymetry Confidence Bathymetry confidence provides a way to specify the limits of bathymetry data that you will accept as valid for playing back a file in Isis. This applies to the Isis displays only and does not affect recorded data. A dialog box for this purpose is accessible from Window→Status and Control→Bathymetry Confidence (Figure 10-34).
June 2004 Isis® Sonar User's Manual, Volume 1 280 As the Bathymetry Confidence dialog box shows, you can specify the water depth being reported by a Beam No. or by the distance at Nadir. This gives you a way of monitoring and comparing the actual water depth as being reported simultaneously by a single-beam and multibeam sonar system. In this same area, you can specify a Bias, in meters, to be used from two different ensonifying devices, if your data requires it.
June 2004 Isis® Sonar User's Manual, Volume 1 281 10.9 Orientation The Orientation command has a child window that allows you to specify whether data display windows will be Automatic, which means you will let Isis choose the orientation based on the type of data being displayed; Horizontal, which is best for side-scan data; or Vertical, which is best for viewing subbottom data.
June 2004 Isis® Sonar User's Manual, Volume 1 282 Once you have saved the layout, you can then recall it either manually or automatically for any Isis session. Layouts for all Isis child windows, including graph windows, can be preserved and recalled in this fashion. Colors reset when a new Layout is selected. 10.12 Reset Windows If you click Reset Windows or press +, Isis closes all currently open windows in a data set being played back and replays the data set from the beginning. 10.
June 2004 Isis® Sonar User's Manual, Volume 1 Chapter 11 283 Using the Help Menu To get on-line help about Isis topics, use the Help menu. This chapter explains the functions found there. To access the Help menu in Isis 1. From the main menu, choose Help. 2. The system displays the Help menu functions shown below.
June 2004 Isis® Sonar User's Manual, Volume 1 284 Table 11-1. Get Info statistics box File Format Number of Sonar Channels Samples per Channel Bits per Sample Bytes per Ping Number of Bathymetry Channels Three possibilities exist: Isis (also known as XTF, or extended Triton format), Q-MIPS (generic DAT), or SEG-Y. The organization, layout and content of these formats is documented in segyfmt.h, available from the TEI FTP site. You can get there from www.tritonelics.com.
June 2004 Isis® Sonar User's Manual, Volume 1 11.1 Get Info The Get Info command in the Isis Help menu supplies you with specific information about the file that is currently being recorded or replayed. For example: Figure 11-2: Get Info statistics from Help Table 11-1 explains the parameters displayed in this Get Info box. 11.2 About Isis The About Isis command displays the current software version and the Isis copyright.
June 2004 Isis® Sonar User's Manual, Volume 1 286 11.3 Contents Use the Contents command to see a listing of the Isis help topics that are available for viewing. This command is a simple way to get into the Isis help environment. 11.4 Search for Help on Use the Search for Help command to get direct help on a specific topic. 11.5 How to Use Help The Isis help environment follows the standard for Windows applications.
June 2004 Isis® Sonar User's Manual, Volume 1 287 Chapter 12 Maintenance and Troubleshooting The Isis modular data acquisition system is built from highly reliable components and requires a minimum of maintenance. However, to deliver the maximum performance and to avoid premature hardware failures, you should periodically perform maintenance procedures as described below. 12.
June 2004 Isis® Sonar User's Manual, Volume 1 288 • Frequently back up the hard disk. Your data and your time are precious. Should hard drive data loss or failure occur, a current backup will eliminate the need for time-consuming system configuration from the original floppy disks. Backups should be done on removable high-capacity mass storage media.
June 2004 Isis® Sonar User's Manual, Volume 1 12.3.2 289 DSP Board This diagnostic can check several aspects of the board’s working condition: • • • • • • 12.3.
June 2004 Isis® Sonar User's Manual, Volume 1 290 The troubleshooting chart shown in Table 12-1 covers some problems you might encounter in Isis and their possible remedies. This chart has been developed from records of past repair activities as well as the logical cause and effect relationship associated with possible problems that could occur in the future. Table 12-1.
June 2004 Isis® Sonar User's Manual, Volume 1 SCSI device is not recognized CMOS Setup Lost System has Target option but will not log a contact or contact information is corrupted Default Isis parameters appear to be corrupted 291 If hard drive is Possibly “Invalid not recognized, drive system will not specification” boot SCSI cable connectors not seated; press firmly on all SCSI connectors. SCSI bus improperly terminated; refer to Appendix C for correct SCSI bus setup.
June 2004 Isis® Sonar User's Manual, Volume 1 292 12.4 Emergency Boot Disk An Emergency Boot Disk comes with the Isis system. If the Isis system will not boot from the hard disk, it may be possible to get the system running using the Emergency Boot Disk (EBD). If you believe it’s necessary to use the EBD, Triton Elics advises that the EBD boot be done either by someone who is familiar with MS-DOS 6.2 or by someone who is in direct phone contact with Triton Elics.
June 2004 Isis® Sonar User's Manual, Volume 1 293 Isis can easily interface to any towfish telemetry or navigation system through a serial port (see Chapter 4 and Appendix D). Should you need support, however, Triton Elics will generally provide assistance at no charge. Parallel interfaces are much more involved and cannot be completed without additional software from Triton Elics. Engineering support is billed at standard billing rates for all work on parallel navigation interfaces. 12.5.
June 2004 Isis® Sonar User's Manual, Volume 1 294 leave your name, ship, phone/Marisat number, location and urgency of the problem on the recording at Triton Elics’s phone number. • Calls returned by Triton Elics are customarily billed at cost plus 20 percent. This is especially important to consider when calls are returned to a ship at sea via Marisat, high seas operator or local marine operator. Triton Elics recommends that cellular phones be used whenever possible and where coverage is satisfactory.
June 2004 Isis® Sonar User's Manual, Volume 1 295 Warranty repair of complex boards and drives may require as long as two weeks. Triton Elics cannot provide cross-shipment of replacement boards or drives without the latter being purchased. Therefore, spare parts are essential to guarantee minimum downtime. 12.6.2 Extended Maintenance Agreement An Extended Maintenance Agreement (EMA) on the total Isis system can be purchased from Triton Elics in increments of one year.
June 2004 Isis® Sonar User's Manual, Volume 1 Chapter 12: Maintenance and Troubleshooting 296
