ashtech GG Surveyor, Reference Manual

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112 GG Surveyor GPS+GLONASS Reference Manual
Internally, the receiver implements the transformation from WGS-84 to
WGS-72. Figure 6.2 demonstrates the change in the coordinate systems.
$PASHQ,UDD,c
The associated query command is
$PASH,UDD,c
where c is the optional output
port; and is not required to direct the response message to the current communication
port.
Example: Query datum parameters to port C.
$PASHS,UDD,c<Enter>
$PASHR,UDD
The response is in the format:
$PASHR,UDD,d1,d2,f1,f2,f3,f4,f5,f6,f7,f8
where the fields are as defined in Table 6.31.
USE: Use Satellites
$PASHS,USE,d,c
Selects satellites to track or not track, where
d = ID number of satellite, 1-32 for GPS, 33-56 for GLONASS
ALL = all satellites
GPS = GPS satellites only
GLO = GLONASS satellites only
Figure 6.2: Rotation and Translation Between Coordinate Systems