Kongsberg EM 710 - Page 17

Inputdatagrams
TrimbleGGKDatagram
Table3GGKDatagram
DataDescriptionFormatValidrangeNote
Startidentier=$
Always24h
——
Talkeridentier
aa
Capitalletters
—
SentenceformatterAlwaysGGK,
——
Timeofposition
hhmmss.ss,000000to235959.99...
—
Dateofposition
MMDDYY ,010100to123199
—
Latitudeindegreesandminutes,plusoptional
decimalminutes
llll.llllll,0000to9000.0...
—
Latitude–N/S
a,
NorS
—
Longitudeindegreesandminutes,plusoptional
decimalminutes
yyyyy.yyyyyy,
00000to18000.0...
—
Longitude–E/W
a,
EorW
—
GPSqualityindicator
x,
0to31
Numberofsatellitesinuse
xx,
00to12
—
DOP
x.x,—
1
Antennaellipsoidalheight
x.x,——
Unitsofantennaellipsoidalheight
M,
——
Unitsofantennaellipsoidalheight
x.x,——
Checksum*hh
——
Endofsentencedelimiter=CRLF
Always0Dh0Ah
——
Notes
1TheDOP(DilutionOfPrecision)valuewillbescaledandcopiedtothe”Measureof
positionxquality”eldinthepositionoutputdatagram.Thescalefactordepends
upontheGPSqualityindicator’svalue
•1-(SPSorstandardGPS)=>1000
•2-(differentialGPS)=>100
•3-(kinematicGPS)=>10
The”Measureofpositionxquality”eldwillbesetto65534(largestvalid
number)iftheindicatoriszero(non-validposition).
Thisscalingisusedtogiveatleastarelativelycorrectpositionxqualitychange
(incm)iftherearedropoutsindifferential,preciseorkinematicmeasurements,
althoughDOPisnotametervalue.
TheGPSmanufacturersmayhavedifferentGPSqualityindicators.
850-160692/S
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