19
Note: The checksum field starts with a '*' and consists of 2 characters
representing a hex number. The checksum is the exclusive
OR of all characters between '$' and '*'.
Field
1
2
3
4
5
6
7
8
9
10
11
12
13
Example
104549.04
2447.2038
N
12100.4990
E
1
06
01.7
00078.8
0016.3
5C
Description
UTC time in hhmmss.ss format,
000000.00 ~ 235959.99
Latitude in ddmm.mmmm format
Leading zeros transmitted
Latitude hemisphere indicator,
'N' = North, 'S' = South
Longitude in dddmm.mmmm format
Leading zeros transmitted
Longitude hemisphere indicator,
'E' = East, 'W' = West
Position fix quality indicator
0: position fix unavailable
1: valid position fix, SPS mode
2: valid position fix, differential GPS mode
Number of satellites in use, 00 ~ 12
Horizontal dilution of precision, 00.0 ~ 99.9
Antenna height above/below mean sea level,
-9999.9 ~ 17999.9
Geoidal height, -999.9 ~ 9999.9
Age of DGPS data since last valid RTCM
transmission in xxx format (seconds)
NULL when DGPS not used
Differential reference station ID, 0000 ~ 1023
NULL when DGPS not used
Checksum
