Table 37: Gps-Fix Data Sentence - NorthStar 8700 Technical Reference Manual

05/01/97 REV H
GPS-fix data ($GPGGA)
This message provides time, position, and fix-related data.

Table 37: GPS-fix data sentence

Data field Contents
$GPGGA,hhmmss.ss,llll.llll,a,yyyyy.yyyy,a,x,xx,xx.x,
±xxxxx.x,M,xxxx,M,xxxx,xxxx*hh<CR><LF>
UTC of position
hhmmss.ss
Latitude (with respect to WGS-84). Two digits of
llll.llll
degrees and minutes; four digits of decimal fraction
of minutes
N/S (North or South)
a
Longitude (with respect to WGS-84). Three digits of
yyyy.yyyy
degrees; two digits of minutes; four digits of decimal
fraction of minutes
E/W (East or West)
a
Quality indicator (GPS quality indicator). 0 = fix
x
unavailable or invalid; 1 = GPS fix; 2 = DGPS fix.
SVs in use (may be different from number in view).
xx
HDOP
xx.x
Altitude (with respect to mean sea level)
±xxxxx.x
Units of antenna altitude, in meters
M
Geoidal separation. The difference between the
xxxx
WGS-84 earth ellipsoid and mean sea level (geoid). If
negative, mean sea level is below ellipsoid.
Units of geoidal separation, in meters
M
Age of DGPS data (time, in seconds, since the last
xxxx
SC-104 Type 1 or 9 update; empty field when DGPS
isn't used)
Differential reference station ID (0000-1023)
xxxx
Example N:
$GPGGA,012338.61,5619.2837,N,17235.8964,E,1,05,02.3,-00
034.2,M,,M,,*66<CR><LF>
Section 10 - NMEA protocols
PAGE 55