NMEA $GPXTE messages

Hi Guys,

A quick example on what $GPXTE messages are. Keep in mind that the sentence Identifier can also be displayed as $GNXTE. The message is the same but some GNSS receivers use this format.

Cross Track Error, Measured
eg1. $GPXTE,A,A,0.67,L,N

       A            General warning flag V = warning
                            (Loran-C Blink or SNR warning)
       A            Not used for GPS (Loran-C cycle lock flag)
       0.67         cross track error distance
       L            Steer left to correct error (or R for right)
       N            Distance units - Nautical miles

eg2. $GPXTE,A,A,4.07,L,N*6D
1 2 3 4 5 6

  1    A         validity
  2    A         cycle lock
  3    4.07      distance off track
  4    L         steer left (L/R)
  5    N         distance units
  6    *6D       checksum