ashtech DG14, Reference Manual

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NMEA Commands 273
NMEA Commands
$PASHR,SAT
The SAT message contains information on the number of visible satellites, whether
the satellite is being used in position computations, plus elevation, azimuth, and
signal to noise measurements for each satellite. The message is output in the
format:
$PASHR,SAT,d1,((d2,d3,d4,d5,c6)*d1)*hh
Table 8.46 outlines the response message.The data fields for PRN number (d2),
azimuth (d3), elevation (d4), signal to noise ratio (d5), and the used/not used flag
(c6) are repeated for each satellite, using the value in the d1 field as a multiplier.
Table 8.46. $PASHR,SAT Message Format
Field Description Range
d1 The number of satellites locked by the receiver 1 to 14
d2 Satellite PRN number 1 to 32 for GPS
33 to 64 for SBAS
d3 Satellite azimuth angle 0° to 359°
d4 Satellite elevation angle 0° to 90°
d5 Satellite signal-to-noise ratio (dbHz) 0 to 99