ashtech GG Surveyor, Reference Manual

Page: 73 / 256

Differential and RTK Operations 55
Differential and RTK
Send the following commands to the receiver. The receiver accepts RTCM RTK data
in message types 18 (Carrier phase data) and 19 (Code phase data) and 3 and 22 (Base
station position).
The receiver is set up as a RTK remote station. Turn on the GGA, GLL, POS or PBN
message to obtain position.
RTK (Real Time Kinematic) and CPD (Carrier Phase Differential) are synonyms.
Advanced Remote Station Operation
Recommended Advanced Parameter Settings for
Differential Remote Stations
There are many parameters that control the operation of the receiver. Most should be
left at default values. The following settings are recommended for Differential
Remote Stations.
$PASHS,CRR,S
$PASHS,LPS,10,3,1 (for high dynamic or high vibration applications)
$PASHS,AIM,0.015
Other parameter settings at factory default.
Table 5.8: RTK Remote Station Command
Command Description
$PASHS,RST Reset the receiver to factory defaults
$PASHS,RTC,REM,x Set the receiver as a remote station, receiving corrections
on serial port x
$PASHS,SPD,x,n Set the baud rate of serial port x to the same as the radio
providing the corrections.
$PASHS,CPD,MOD,ROV Set the receiver as an RTK remote
$PASHS,SAV,Y Save settings