ashtech HDS800, Reference Manual

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621
Troubleshooting
• Move the base or rover if sites have satellite
obstructions. If your base or rover site has any
obstructions 5° above the horizon, the obstructions
may be blocking essential satellites. If obstructions
exist at the base or the rover, move the system to an
open area.
If the problem is not yet resolved and at least 5
satellites are now tracked and used, your rover may be
malfunctioning. Contact your local dealer or email
Ashtech technical support for assistance.
2. If the base and rover are tracking at least 5 common
satellites
, your rover may be malfunctioning. Contact your
local dealer or email Ashtech technical support for
assistance.
Rover is Computing Positions with High Uncertainties
You find that the rover is computing a position but the
uncertainties (HRMS, VRMS) assigned to the position are
unacceptably high. Follow the steps outlined below to
troubleshoot this problem.
Step 1. Is the
Receiver Set to
Function as an RTK
Rover?
The rover must be set to function in RTK rover mode in order
for it to compute accurate RTK positions. If the rover is not
set in RTK rover mode, the receiver will compute autonomous
positions which could contain about 10 meters or more of
error. This is probably the problem if HRMS and VRMS values
are in the 10s of meters. Check that the system is configured
as an RTK rover. For example, with FAST Survey:
• If the receiver is not set to function as an RTK rover , go to
the
Equip
menu>
GPS Rover
>
RTK
tab and set the different
parameters to match your application.
• If the receiver is set to function as an RTK rover , go to step
2.
RTK Base RTK Rover PP Base PP Rover
Relevant to •