Kongsberg EM 710 - Page 16

KongsbergEMSeries
PTNL,GGKLocalcoordinatepositiondatagram
Table2PTNLDatagram
DataDescriptionFormatValidrangeNote
Startidentier=$
Always24h
——
Sentenceidentier
AlwaysPTNL,
——
SentenceformatterAlwaysGGK,
——
Timeofposition
hhmmss.ss,000000to235959.9...
—
Dateofposition
mmddyy,010100to123199
—
Latitudeindegreesandminutesddmm.mmmmmmm,0000to9000.0...
—
Latitude–N/S
a,
NorS
—
Longitudeindegreesandminutesdddmm.mmmmmmm,00000to18000.0...
—
Longitude–E/W
a,
EorW
—
GPSqualityindicator
x,
0to71
Numberofsatellitesinuse
xx,
00to12
—
DOP
x.x,—
1
Antenna/heightaboveellipsoid
EHTx.x,
——
Unitsofellipsoidalheight(meters)
M,
——
Checksum*hh
——
Endofsentencedelimiter=CRLF
Always0Dh0Ah
——
Notes
1TheDOP(DilutionofPrecision)valuewillbescaledandcopiedtothe”Measureof
positionxquality”eldinthepositionoutputdatagram.Thescalefactordepends
upontheGPSqualityindicator’svalue
•1–(StandardGPS)=>1000.0;
•2–(RTKoat)=>50.0;
•3–(RTKx)=>10.0;
•4–(DGPS)=>100.0;
•5–(W AAS/EGNOS)=>100.0;
•6–(NetworkFloat)=>50.0;
•7–(Networkx)=>10.0;
The“Measureofpositionxquality”eldwillbesetto65534(largestvalid
number)iftheindicatoriszero(non-validposition).
Thisscalingisusedtogiveatleastarelativelycorrectpositionxqualitychange
(intheorderofcm)iftherearedropoutsindifferential,preciseorkinematic
measurements,althoughDOPisnotametervalue.
TheGPSmanufacturersmayhavedifferentGPSqualityindicators.
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