Furuno FM-8800D - Manual (Page 122)

APPENDIX
AP-16
GLL - Geographic position - latitude and longitude
$--GLL,llll.lll,a,yyyyy.yyy,a,hhmmss.ss,A,a*hh<CR><LF>
| | | | | | | |
| | | | | | | +------- 6
| | | | | | +--------- 5
| | | | | +----------- 4
| | | | +---------------- 3
| | +------+----------------------- 2
+---+----------------------------------- 1
1. Latitude, N/S
2. Longitude, E/W
3. UTC of position
4. Status: A=data valid, V=data invalid
5. Mode indicator(see note)
6. Checksum
NOTE Positioning system Mode indicator:
A = Autonomous
D = Differential
E = Estimated(deadreckoning)
M = Manual input
S = Simulator
N = Data not valid
The Mode indicator field supplements the Status field. The Status field shall be
set to V=invalidfor all values of Operating Mode except for A=Autonomous and
D=Differential. The positioning system Mode indicator and Status field shall not
be null fields.
GNS-GNSS fixed data
$--GNS,hhmmss.ss,llll.ll,a,yyyyy.yy,a,c--c,xx,x.x,x.x,x.x,x.x,x.x*hh<CR><LF>
| | | | | | | | | | | | |
| | | | | | | | | | | | +--- 11
| | | | | | | | | | | +------ 10
| | | | | | | | | | +---------- 9
| | | | | | | | | +-------------- 8
| | | | | | | | +------------------ 7
| | | | | | | +---------------------- 6
| | | | | | +------------------------- 5
| | | | | +------------------------------ 4
| | | +-------+--------------------------------- 3
| +--+--------------------------------------------- 2
+------------------------------------------------------------- 1
1. UTC of position
2. Latitude, N/S
3. Longitude, E/W
4. Mode indicator
5. Total number of satellites in use,00-99 (Not used.)
6. HDOP (Not used.)
7. Antenna altitude, meters, re: mean-sea-level(geoid) (Not used.)
8. Geoidal separation (Not used.)
9. Age of differential data (Not used.)
10. Differential reference station ID (Not used.)
11. Checksum