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Technical specications | HS80/HS80A/MX575C/MX575D User Manual
(6) GST - GNSS Pseudorange Error Statistics
This message is used to support Receiver Autonomous Integrity Monitoring (RAIM).
Pseudorange measurement error statistics can be translated in the position domain in order
to give statistical measures of the quality of the position solution.
If only GPS, GLONASS, etc. is used for the reported position solution, the talker ID is GP, GL, etc.,
and the error data pertains to the individual system. If satellites from multiple systems are
used to obtain the reported position solution, the talker ID is GN and the errors pertain to the
combined solution.
$GPGST,hhmmss.ss,x.x,x.x,x.x,x.x,x.x,x.x,x.x*hh<CR><LF>
1 2 3 4 5 6 7 8
¼ Notes:
1 UTC time of the GGA or GNS fix associated with this sentence
2 RMS value of the standard deviation of the range inputs to the navigation
process. Range inputs include preudoranges & DGNSS corrections
3 Standard deviation of semi-major axis of error ellipse (meters)
4 Standard deviation of semi-minor axis of error ellipse (meters)
5 Orientation of semi-major axis of error ellipse (degrees from true north)
6 Standard deviation of latitude error (meters)
7 Standard deviation of longitude error (meters)
8 Standard deviation of altitude error (meters)
(7) GSV - GNSS Satellite in View
Number of satellites (SV) in view, PRN numbers, elevation, azimuth and SNR values. Four
satellites maximum per transmission, additional satellite data sent in second or third message.
Total number of messages being transmitted and the number of the message transmitted are
indicated in the first two fields.
$GPGSV,x,x,xx,xx,xx,xxx,xx,....................,xx,xx,xxx,xx,x*hh<CR><LF>
1 2 3 4 5 6 7 8 9 10 11 1213
¼ Notes:
1 Total number of messages, 1 to 3
2 Message number, 1 to 3
3 Total number of satellites in view
4 Satellite PRN number
5 Elevation, degrees, 90 degrees maximum
6 Azimuth, degrees True, 000 to 359
7 SNR (C/No) 00-99 dB, null when not tracking
8 2nd and 3rd SV
9, 10, 11, 12 4th SV
13 Signal ID: 1 = GPS L1/CA, 2 = GLONASS L1, 3 = GALILEO, 4 = RESERVE
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