ashtech Reliance FS/2, Operation Manual

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Field Operation 63
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Frequently Asked Questions
Q: How do I turn the GPS receiver off?
A: There are three ways to turn the receiver off:
a. Pressing shift-F1 from FAMlog screen on the FS/2.
b. Pressing the receiver power switch until the status light stops flashing
c. Disconnecting receiver batteries. Of the three, pressing shift-F1 on the
handheld is the preferred method.
Q: How long do the receiver batteries last?
A: Two new, fully-charged lead-acid type camcorder batteries should last eight hours
at a temperature of 25°C. Always carry a spare battery for the receiver.
Q: How long do the FS/2 batteries last?
A: The FS/2 uses three AA alkaline batteries which last about 30 hours under typical
use.
Q: What is stored in the FS/2 and what is stored in the receiver?
A: The FS/2 stores FAMlog program files, feature files, waypoint files, and current
configuration settings. The DOS
dir
commands list all files in the current directory
of the FS/2. The GPS receiver stores all GPS data, feature descriptions, and external
sensor and LRF data files. The FAMlog program, the feature files, and the waypoint
files are stored in the FS/2.
Q: How long does receiver memory last?
A: For an average of six satellites, the standard 4.5 Mb storage of the receiver records
continuous GPS measurements at a one-second interval for about 8 hours. At a five-
second recording interval, the receiver records data continuously for about 40 hours.
Logging position-only data, (no post-processing) allows over 40 times the
aforementioned durations.
Q: What recording interval should I use?
A: If you want to produce detailed lines and areas, then you should select the shortest
interval, 1 second. However, a 1-second interval requires more receiver memory.
Longer sessions can be recorded using a recording interval of 2 or 5 seconds, but lines
and areas will not be as detailed. It is safest to set the base and rover to the same
interval or set the base to 1-second. The rover recording interval divided by the base
station recording interval must be an integer for post-processing of all collected data.
Q: How many sessions can I record?
A: The receiver can record up to 100 sessions or until memory is full. The number of
sessions in a project is limited only by the memory available on the PC.