GGA - Global Positioning System fix data

The GGA record contains time, position and fix related data for a GNSS receiver. See the following bitmap and spreadsheet for a description of a record:

Fields of the GGA message string

Note – The latitude and longitude are in the datum and ellipsoid of the selected reference frame.

GGA_record

Field	Description
1	Universal Time Coordinated (UTC) [hhmmss.ss] of position fix
2	Latitude in [DDMM.MMMMMM]
3	Direction of latitude N: North S: South
4	Longitude in [DDDMM.MMMMMM]
5	Direction of longitude E: East W: West
6	GPS Quality Indicator 0: fix not available 1: GPS fix 2: Differential GPS fix 4: Real-Time Kinematic, fixed integers 5: Real-Time Kinematic, float integers
7	Number of GPS satellites being used [0 - 12]
8	HDOP of fix
9	Orthometric height (MSL reference)
10	M: orthometric height is measured in meters
11	Geoid separation, the difference between the earth ellipsoid and mean-sea-level (geoid), "-" means mean-sea-level below ellipsoid
12	M: geoid separation is measured in meters
13	Age of differential GPS data, time in seconds since last SC104 type 1 or 9 update. Null field when DGPS is not used.
14	Differential reference station ID, [0000-1023]. A null field when any reference station is selected and no corrections are received.
15	Checksum [00 - FF]