ashtech Reliance FS/2, Operation Manual

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14 Reliance with FS/2 Field Operations Manual
Data Logging Guidelines
Many new users inadvertently create multiple fragmented receiver files, each
containing only a few minutes of GPS data and a handful of features. Feature
accuracy is compromised because the processor can not properly post-process these
fragmented files. To avoid multiple receiver files, follow these guidelines:
• Do not change the recording interval on the Datalogging Setup screen
except at the beginning of your survey. Lowering the recording interval
while occupying a point does not increase the accuracy; in contrast,
changing the recording interval actually decreases the accuracy.
• Do not access the following screens while a session is in progress:
•
Session Setup screen
• Feature File Selection screen
• Receiver Reset screen
These screens send parameters to the receiver for creating a new file. If
any one of these screens is accessed while a session is in progress, press
CNCL to exit the screen.
• Do not interrupt receiver power during a session. Disconnecting the
receiver batteries, disconnecting the receiver cable, or pressing the receiver
power switch, creates a new file in the receiver. Avoid power interruptions
by always using two freshly-charged camcorder batteries to power the
receiver. If, for any reason, the power interrupts during a session, stop all
point, line, and area feature logging and exit FAMlog. After correcting the
power problem, restart the system, and re-collect any features being logged
when the power interruption occurred.
• Do not exit FAMlog during a session. Exiting and restarting FAMlog
creates new files. It is good practice at the start of a survey to configure all of
the session parameters and then to use the Receiver File Management screen
to delete any superfluous files.