CodaOctopus F180R - Gst

Hardware
Copyright © 2015 Coda Octopus Products Ltd
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F180R MOTION Sensor User and Reference Guide
Figure 32: NMEA GSV string
Field
Description
t
Total number of messages of this type in this cycle
m
Message number, 1 to 4
ss
Number of theoretically visible satellites according to the current alemanac
xx
Satellite's PRN number
ee
Elevation in degrees, 90° maximum, empty when not tracking
aaa
Azimuth, degree from true north, 000° to 359°
nn
SNR in dB, 00 to 99 dB of L1 signal, null field when not tracking
...
Repeat set of PRN, elevation, azimuth and SNR for the remaining three
satellites
*hh
Checksum
3.5.2.2.5 GST
This string, GNSS Psuedorange Error Statistics, is used to support Receiver Autonomous
Integrity Monitoring (RAIM). Psuedorange measurement error statistics can be translated in
the position domain in order to give statistical measures of the quality of the position
solution.
Figure 33: NMEA - GST Format