D Logs Summary
160 MiLLennium GPSCard SW Version 4.503/4.52 Command Descriptions Manual Rev 2
GGAB Global Position System Fix Data (Binary Format Only)

Time, position and fix-related data of the GPS receiver. This binary log is a replica of the NMEA GPGGA ASCII

log expressed in binary format with NovAtel header added.

Format: Message ID = 27 Message byte count = 80

Note: 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.
Field # Data Bytes Format Units Offset
1Sync 3char 0
(header) Checksum 1char 3
Message ID 4integer 4
Message byte count 4integer 8
2UTC time of position 8double hhmmss.ss 12
3Latitude (DDmm.mm)
(+ is North, - is South) 8double degrees 20
4Longitude (DDDmm.mm)
(+ is East, - is West) 8double degrees 28
5Fix status
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
4integer 36
6Number of satellites in use. May be different to the number in view 4integer 40
7Horizontal dilution of precision 8double 44
8Antenna altitude above/below mean-sea-level (geoid) 8double meters 52
9Geoidal separation (see Figure C-6, Page 132) 8 double meters 60
10 Age of Differential GPS data 18double seconds 68
11 Differential reference station ID, 0000-1023 4integer 76