Chapter 10
GTD-110/150
Technical Reference
10-6
93151542-00
GGA
Global positioning system (GPS) fix data
Ver.1.5
/2.0
GTD
Geographical position – Loran-C TDs (only available when Loran-C is designated)
Ver.2.0
GLL
Geographic position – latitude/longitude
Ver.1.5
/2.0
$ GP GTD, XXXXX.X, , XXXXX.X, , , *hh <CR><LF>
TD (Time Difference)1
(
μ
S)
Checksum
Start of sentence
Talker device
Sentence
name
TD2 (
μ
S)
$ GP GLL, XXXX.XXX, N/S, XXXX.XXX, E/W, *hh <CR><LF>
latitude
Checksum
longitude
E: East
W: West
N: North
S: South
Start of sentence
Talker device
Sentence
name
$ GP GGA, hhmmss, XXXX.XXX, N/S, XXXXX.XXX, E/W
X, XX, XXX, 0/-XXXX, M, 0/-XXX, M, *hh <CR><LF>
UTC of position
Latitude
Longitude N/S
Latitude N/S
Checksum (Ver2.0 only)
Units of geoidal separation
Geoidal
separati
Units of antenna altitude, meter
Antenna
altitude
0 or – (0: positive, -: negative
HDOP
value
Number of satellite I use, 00 - 12
GPS quality indicator (See NOTE)
Start of sentence
Talker device
Sentence
name
Longitude
NOTE:
0 = fix not available or invalid
1 = GPS mode, fix valid
2 = differential GPS, SPS mode, fix valid
3 = GPS PPS mode, fix valid
0 or – (0: positive, -: negative)
$ GP GGA, hhmmss, XXXX.XXX, N/S, XXXXX.XXX, E/W
