NMEA-0183 message: PTNL,REX

Rover Extended output

The PTNL,REX message is only populated when a receiver has MBCMR or MBCMRx correction inputs and can perform a Moving Base vector solution. This Rover Extended output provides the rover position derived from the moving base corrections, the constellations and number of satellites used, and the vector components (East, North, Up) from the source of the corrections to the rover antenna.

To produce REX output, the following are needed:

Valid primary fix
External vector from Moving Base CMR/CMR+/CMRx input
Valid reference time stamp
Valid reference ID (>= 0)
Valid reference accuracy figure-of-merit, including "0" (i.e., "unknown" or "N/A")

An example of the PTNL,REX message string is:

$PTNL,REX,170818.00,GREB,27,3723.09414105,N,12200.32556922,W,-6.260,0.029,0.029,0.029, 0.000,0.000,0.001,0.002,0.003,0.005,20,3*48

PTNL,REX message fields

Field	Meaning
0	TalkerID $PTNL
1	Message ID REX
2	UTC time of position fix, in hhmmss.ss format. Hours must be two numbers, so may be padded. For example, 7 is shown as 07. In this example: 170818.00
3	Constellations used in solution G = GPS, R = GLONASS, E = Galileo, B = Beidou, Z = QZSS, I = NavIC A GPS and GLONASS result is reported as "GR". In this example: GREB.
4	Number of satellites being used in the position In this example: 27
5	Latitude of rover in degrees and decimal minutes (ddmm.mmmmmm) In this example: 37°23.09414105'
6	Direction of latitude: N: North S: South In this example: N
7	Longitude of rover vector position, in degrees and decimal minutes (dddmm.mmmmmmmm). Should contain three digits of ddd. In this example: 122°00.32556922'
8	Direction of longitude: E: East W: West In this example: W
9	Height, [h].hhh, of the rover vector antenna, in meters, above WGS-84 ellipsoid. In this example: -6.260
10	Longitude, [x].xxx, 1-sigma error (N/S), absolute, in meters ¹ In this example: 0.029
11	Latitude [x].xxx, 1-sigma error (E/W), absolute, in meters ¹ In this example: 0.029
12	Altitude [x].xxx, 1-sigma error, absolute, in meters ¹ In this example: 0.029
13	Vector East [x].xxx +E, in meters In this example: 0.000
14	Vector North [x].xxx +N, in meters In this example: 0.000
15	Vector Up [x].xxx +U, in meters In this example: 0.001
16	Vector East component 1-sigma error, in meters In this example: 0.002
17	Vector North component 1-sigma error, in meters In this example: 0.003
18	Vector Up component 1-sigma error, in meters In this example: 0.005
19	Reference Station ID [r] In this example: 20
20	Vector Fix Quality Indicator: 0: Fix not available or invalid 1: Autonomous GPS fix 2: RTK float solution or RTK location solution 3: RTK fix solution 4: Differential, code phase only solution (DGPS) 5: SBAS solution 6: 3D Network solution for RTK float or RTK location 7: RTK Fixed 3D Network solution 8: 2D Network solution for RTK float or RTK location 9: RTK Fixed 2D Network solution 10: OmniSTAR HP/XP solution 11: OmniSTAR VBS solution 12: RTK Location 13: Beacon DGPS 14: CenterPoint RTX, QZSS CLAS 15: xFill-RTX 16: INS Dead Reckoning
21	The checksum data, always begins with * In this example: *48

1. The accuracy estimate reflects the uncertainty of the rover absolute position. This is based on both the accuracy of base and the accuracy of the vector.