User manual

Table Of Contents
one of the cardinal points. Be sure the rows are in the proper order. Alternatively, you can create
the text file manually. Fill the first, second, and fifth columns with zeros. Then scroll tilt and
compass or use the pass-through ACM communications utility to make a compass measurement
at each of the eight cardinal points. Enter these values in the third (HX) and fourth (HY) columns
of the file. Again, be sure the rows are in the proper order.
Running acm_corr.m
The following executable Matlab files (and the MMP data files) must be present in the
current working directory to run the program: acm_corr.m, acm_corr.fig, p_corr.m, c_circle.m.
1. Start Matlab and set the current working directory to the folder containing acm_corr.m,
acm_corr.fig, p_corr.m, c_circle.m, and the data files.
2. Type acm_corr at the Matlab prompt. This will start the GUI interface and generate an
empty plot window.
3. Enter a file name in the text entry box above the "Process" and "Quit" buttons of the GUI.
Do not include the .txt extension. The default file name is spintest. Other possible entries
are A0000000, A0000414, and A0000711.
4. Click ‘Process’ to start the calculation. Depending on the speed of you computer and the
size of the file, execution may require up to several seconds.
5. Offset and scale factors will be displayed in the ‘Offset’ and ‘Scale’ text boxes. The plot
window will display the corrected and uncorrected data. If the data were in an eight
element file named spin test, the eight angular biases and the average angular bias will
also be displayed.
6. Repeat steps 3) to 5) to process additional data files. Click ‘ ‘Quit’ ‘ to exit.
7. The plots can be printed or saved to a file using the icons in the tool bar at the top of the
plot window and the options in the ‘File’ menu of the plot window.
Running acm_corr.exe
To run acm_corr.exe, you must first perform a short installation procedure. The
installation only needs to be performed once. A new entry will be made on your system path and
a folder will be created at C:\MLMGRTL during the installation. The executable and a support
folder will be added to the directory where the compass data will be processed. If you wish to
uninstall the changes you only need to remove the entry from your system path and delete the
Appendix D-2