User manual

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5. Frequently Asked Questions
5.1. Question: Where is the Antenna Reference Point (ARP) located on the APS-
3?
Answer: The NGS ARP is the bottom of the bolt on the underside of the APS-3. The
NGS calibration value for the APS-3 L1 vertical offset is 113.5 mm. For more
information see section 2.4 GNSS Antenna Offsets:
http://www.ngs.noaa.gov/cgi-bin/query_cal_antennas.prl?Model=APS
Figure 18: NGS ARP Diagram
5.2. Question: Does the APS-3 L1 vertical offset need to be added to the
measured height to the bolt?
Answer: No. Data collection software adds the vertical offset automatically
when the appropriate antenna type is selected.
5.3. Question: How do I know which battery I can remove without having
operations interrupted?
Answer: Use the battery status indicator in data collection software to
confirm which battery is “in use” before hot-swapping batteries.
5.4. Question: How do I make the push button logging files increment rather
than appending once SurvCE has been used?
Answer: Send the increment command via the Send File utility, which can be
located via SurvCE  Equip Tab  GPS Utilities  Send Command. Then
enter: setFileNaming, DSK1, Incremental, ALTUS.
5.5. Question: How do I configure a unit back to the ALTUS factory defaults?
Answer: Located on the ALTUS CD there is a text file called
“APS-3_Default_Config.txt” or “APS-3_Rev2_Default_Config.txt” Follow the