mcmurdo 21-100-001A, User Manual

Page: 96 / 114

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A.5.9 GBS – GNSS Satellite Fault Detection
This sentence is used to support receiver autonomous integrity monitoring (RAIM).
$--GBS, hhmmss.ss, x.x, x.x, x.x, xx, x.x, x.x, x.x *hh <CR><LF>
Field No. Format Description Remark
1
hhmmss.s
s UTC time of the GGA or GNS fix associated
with this sentence
2 x.x Expected error in latitude
3 x.x Expected error in longitude
4 x.x Expected error in altitude ignored
5 xx ID number of most likely failed satellite ignored
6 x.x
Probability of missed detection for most
likely
failed satellite
ignored
7 x.x Estimate of bias on most likely failed satellite ignored
8 x.x Standard deviation of bias estimate ignored
A.5.10
GGA – Global positioning system (GPS) fix data
Time, position and fix-related data for a GPS receiver.
A.5.11
GLL – Geographic Position – Latitude/Longitude
Latitude and longitude of vessel position, time of position fix and status.
$--GLL, llll.ll, a, yyyyy.yy, a, hhmmss.ss, A, a *hh<CR><LF>
Field No. Format Description Remark
1 llll.ll, a Latitude, N/S
2 yyyyy.yy, a Longitude, E/W
3 hhmmss.ss UTC of position
4 A Status, A=data valid V=data invalid
5 a Mode indicator
$--GGA, hhmmss.ss, llll.ll, a, yyyyy.yy, a, x, xx, x.x, x.x, M, x.x, M, x.x,
xxxx*hh<CR><LF>
Field No. Format Description Remark
1 hhmmss.ss UTC of position
2 llll.ll,a Latitude N/S
3 yyyyy.yy,a Longitude E/W
4 x GPS quality indicator ignored
5 xx
Number of satellites in use, 00-12, may
be different from the number in view
ignored
6 x.x Horizontal dilution of precision ignored
7 x.x
Antenna altitude above/below
mean sea level (geoid)
ignored
8 M Units of antenna altitude, m ignored
9 x.x Geoidal separation ignored
10 M Units of geoidal separation,m ignored
11 x.x Age of differential GPS data ignored
12 xxxx Differential reference station ID, 0000-1023 ignored