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JLR-7700 MK2 GPS Navigator
GGA sentence
$GPGGA,hhmmss,llll.lll,a,yyyyy.yyy,a,x,x,xxx,uxxxx,M,uxxx,M,xx,xxxx<CR><LF>
1 2 3 4 5 6 7 8 9 10 11 1213 14
1 : UTC time (hour, minute, and second)
2 and 3 : Latitude (degree and minute), N/S
4 and 5 : Longitude (degree and minute), E/W
6 : GPS quality indicator, 0 = Fix is not available, 1 = Fix with GPS mode, 2 = Fix with DGPS
mode
7 : Number of satellites in use
8 : Horizontal dilution of precision (HDOP)
9 and 10 : Antenna height above or below the mean sea level (m), the unit is fixed to M (m), (u : “+”
is output in case the height is at a positive value and “-” is output in case it is at a negative
value)
11 and 12 : Geoidal separation, (the difference between the WGS-84 earth ellipsoid surface and
mean-sea-level (geoid) surface, “-”=mean-sea-level surface below WGS-84 ellipsoid
surface), the unit is fixed to M (m)
13 : Age of differential GPS data
14 : Differential reference station ID
VTG sentence
$GPVTG,xxx,T,xxx,M,xx.x,N,,<CR><LF>
1234 5 6
1 and 2 : True course (degree)
3 and 4 : Magnetic coure (degree)
5 and 6 : Speed (knot)
XTE sentence
$GPXTE,A,,x.xx,a,N<CR><LF>
1234
1 : GPS status, A= Valid, V = Invalid
2 : Cross-track error (NM)
3 : Direction to steer (L or R)
4 : Unit is fixed to N (nautical mile)
ZDA sentence
$GPZDA,hhmmss,xx,xx,xxxx,xx,xx<CR><LF>
123456
1 : UTC time (hour, minute, and second)
2 : Day (UTC)
3 : Month (UTC)
4 : Year (UTC)
5 : Hour (local zone)
6 : Minute (local zone)
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