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GTM: GLONASS Time Shift Relative or Fixed
$PASHS,GTM,d
This command specifies whether to compute GLONASS system time shift relative to
GPS system time, or hold it fixed, where d is 0, 1, or 2. Default = 1.
When d = 0, if the number of satellites is less than needed, position is not computed.
GTP: Set Priority of GLONASS Time Shift
$PASHS,GTP,c
This command sets the priority of GLONASS system time shift computation against
altitude computation if the number of used satellites is 4, where c sets the priority. If
c = Y, time shift has priority over altitude. If c = N, altitude has priority over time
shift. Default is Y.
Y sets the receiver to compute GLONASS system time shift and hold altitude fixed.
N sets the receiver to compute altitude and hold GLONASS system time shift fixed.
If GPS and GLONASS satellites are used in position computation, and both PMD and GTM are set
to a value different than 0, (fix altitude or time shift when fewer than 5 satellites), then with only 4
used satellites: Y (default) sets the receiver to compute GLONASS time shift and hold altitude fixed.
N sets the receiver to compute altitude and hold GLONASS time shift fixed.
Example: Set to compute GLONASS system time shift and use fixed altitude
HDP: Horizontal Dilution of Precision
$PASHS,HDP,d
Set value of HDOP mask (default = 4), where d is a number between 0 and 99.
Example: Set HDOP mask to 6
86
d = 0 - GLONASS system time shift is never held fixed
d = 1 - Compute GLONASS system time shift if number of satellite (N) is
enough to compute position, but hold it fixed if number of satellites
is N-1. See PMD for number of satellites required to compute
position.
d = 2 - GLONASS system time shift is always held fixed.
$PASHS,GTP,Y<Enter>
$PASHS,HDP,6<Enter>
GG Surveyor GPS+GLONASS Reference Manual
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