ashtech HDS800, Reference Manual

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Query Command Library
SGL: GLONASS Satellites Status
Function
This command is used to read the status of each GLONASS
satellite received.
Command Format
Syntax
$PASHQ,SGL[*cc]
Response Format
Syntax
$PASHR,SGL,d1,n(d2,d3,d4,f5,f6,,d8,d9)*cc
Parameters
Fields f5 and f6 are empty is the corresponding signal is not
tracked.
Satellite Usage Status:
Parameter Description Range
d1 Number of satellites locked 1-27
d2 SV PRN number (64+satellite slot number) 65-96
d3 SV azimuth in degrees 0-359
d4 SV elevation angle in degrees 0-90
f5 SV L1 signal/noise in dB.Hz 30.0-60.0
f6 SV L2 signal/noise in dB.Hz 30.0-60.0
f7 Not used
d8 Satellite usage status (see table below) 0-31
d9 Satellite correcting status (see table below) 0-15
*cc Checksum *00-*FF
Status Description
0 Satellite not tracked
1 Code and carrier/Doppler data used
2 Code-only data used
3 Carrier/Doppler-only data used
4-14 Reserved
15 Unknown usage status
16 No navigation data for this satellite
17 Satellite below elevation mask
18 Satellite declared as unhealthy in ephemeris
19 Computed coordinates of satellite are invalid