PTNL,GGK - Global Positioning System fix data (Trimble proprietary)

The GGK record contains time, position, position type and DOP 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 PTNL,GGK message is longer than the NMEA-0183 standard of 80 characters.
– The latitude and longitude are in the datum and ellipsoid of the selected reference frame.

Field	Description
1	Universal Time Coordinated (UTC) [hhmmss.ss] of position fix
2	Date [mmddyy]
3	Latitude in [DDMM.MMMMMM]
4	Direction of latitude N: North S: South
5	Longitude in [DDDMM.MMMMMM]
6	Direction of longitude E: East W: West
7	GPS Quality Indicator 0: Fix not available or invalid 1: Autonomous GPS fix 2: Differential, floating carrier phase integer-based solution, RTK (float) 3: Differential, fixed carrier phase integer-based solution, RTK (fixed), 4: Differential, code phase only solution (DGPS), 5: WAAS corrected differential position 6: RTK network position (float solution) 7: RTK network position (fixed solution)
8	Number of GPS satellites in fix
9	Dilution of precision in fix (PDOP)
10	Ellipsoidal height of fix
11	M: ellipsoidal height is measured in meters
12	Checksum [00 - FF]