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APPENDIX
A
P-11
DTM - Datum reference
$--DTM,ccc,a,x.x,a,x.x,a,x.x,ccc*hh<CR><LF>
| | | | | | | | |
| | | | | | | | +--- 7
| | | | | | | +------ 6
| | | | | | +---------- 5
| | | | +---+------------- 4
| | +---+------------------- 3
| +------------------------- 2
+---------------------------- 1
1. Local datum W84 - WGS84
W72 - WGS72
S85 - SGS85
P90 - PE90
999 - User defined
IHO datum code
2. Not used
3. Lat offset, min, N/S
4. Lon offset, min, E/W
5. Not used
6. Reference dattum W84 - WGS84
W72 - WGS72
S85 - SGS85
P90 - PE90
7. Checksum
GBS - GNSS satellite fault detection
$--GBS,hhmmss.ss,x.x,x.x,x.x,xx,x.x,x.x,x.x*hh<CR><LF>
| | | | | | | | |
| | | | | | | | +--------- 9
| | | | | | | +------------ 8
| | | | | | +---------------- 7
| | | | | +-------------------- 6
| | | | +----------------------- 5
| | | +--------------------------- 4
| | +------------------------------- 3
| +----------------------------------- 2
+------------------------------------------- 1
1. Not used
2. Expected error in latitude
3. Expected error in longitude
4. Not used
5. Not used
6. Not used
7. Not used
8. Not used
9. Checksum