ashtech GG Surveyor, Reference Manual

Page: 131 / 256

Command/Response Formats 113
Com
m
and
s
c = Y to use, N to not use
By default, all satellites are turned on (set to Y).
Example: Use (track) satellite 15
$PASHS,USE,15,Y<Enter>
USP: Select Satellite to Use in Position Computation
$PASHS,USP,d,c
This command selects an individual satellite to use in position computation, The
structure is $PASHS,USP,d,c, 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
c = Y to use, N to not use
By default, all satellites are turned on (set to Y)
Example: Do not use Satellite 4
$PASHS,USP,4,N
UTS: Synchronize with GPS Time
$PASHS,UTS,s
This command enables (s=ON) or disables (s=OFF) a mechanism that synchronizes
measurements and coordinates with GPS system time rather than with local (receiver)
clock. This means that the calculated pseudo-ranges do not depend upon the receiver
clock stability. This mode simulates a configuration where the receiver has a quartz
oscillator with very high stability and is synchronized with GPS. Default is OFF.
$PASHQ,UTS,x
The associated query command is $PASHQ,UTS,x, where x is the port where the
reply will be sent. Note that x is not required to direct the response message to the
current communication port.
If processing raw data from the receiver with your own processing algorithms, we recommend that
you turn UTS on.
$PASHR,UTS,x
The receiver response message to this query command is in the form:
$PASHR,UTS,x*cc
where x is ON or OFF and *cc is the checksum.