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D Logs Summary
162 MiLLennium GPSCard SW Version 4.503/4.52 Command Descriptions Manual Rev 2
GPGGA Global Position System Fix Data
Time, position and fix-related data of the GPS receiver. The information contained in this log is also available in
the NovAtel GGAB log in binary format. This log will output all null data fields until the GPSCard has set fine
time as monitored by the receiver status word, see Table D-5 Receiver Self-Test Status Codes on Page 198, bits
8,9 and 10.)
Structure:
1 The maximum age reported here is limited to 99 seconds.
2 An indicator of 9 has been temporarily set for WAAS. Then NMEA standard for WAAS has not been decided yet.
Example:
$GPGGA,220147.50,5106.7194489,N,11402.3589020,W,1,08,0.9,1080.406,M,,,,
*48[CR][LF]
$GPGGA utc lat lat dir lon lon dir GPS qual # sats hdop
alt units null null age stn ID *xx [CR][LF]
Field Structure Field Description Symbol Example
1 $GPGGA Log header $GPGGA
2 utc UTC time of position (hours/minutes/seconds/ decimal seconds) hhmmss.ss 220147.50
3 lat Latitude (DDmm.mm) llll.ll 5106.7194489
4 lat dir Latitude direction (N = North, S = South) a N
5 lon Longitude (DDDmm.mm) yyyyy.yy 11402.3589020
6 lon dir Longitude direction (E = East, W = West) a W
7 GPS qual GPS Quality indicator
0 = fix not available or invalid
1 = GPS fix
2 = Differential GPS fix
4 = RTK fixed ambiguity solution
5 = RTK floating ambiguity solution
9 = WAAS
2
x 1
8 # sats Number of satellites in use (00-12). May be different to the number in view xx 08
9 hdop Horizontal dilution of precision x.x 0.9
10 alt Antenna altitude above/below mean sea level (geoid) x.x 1080.406
11 units Units of antenna altitude (M = meters) M M
12 null (This field not available on GPSCards) ,,
13 null (This field not available on GPSCards) ,,
14 age
Age of Differential GPS data (in seconds)
1
xx ,,
15 stn ID Differential reference station ID, 0000-1023 xxxx ,,
16 *xx Checksum *hh *48
17 [CR][LF] Sentence terminator [CR][LF]