Kongsberg EM 710 - Overview

KongsbergEMSeries
•TideInputonpage20
•Depth,pressureorheightinputonpage20
Overview
TheEMSeriesacceptspositiondatainthefollowingformats
•NMEA0183GGA
•GGK
•PTNL,GGK
•SIMRAD90
•Transponderposition
•WiththeGGAandGGKdatagrams,informationcontainedinNMEA0183GSTand
VTGdatagramswillalsobeacceptedandused.
Note
TheGSTdatagramisnotusedbythefollowingmultibeamechosounders:EM122,
EM302,EM710,EM2040,EM2040C,EM3002andME70BO.
•AdatagramformatforSonarHeaddepthisprovidedfortheEM3002,EM3000,EM
2040,EM2000andEM710.Notethattheformatisthesameasthatusedbythe
ParoscienticDigiquartzpressuresensor.Thisformatmayalsobeusedforinputof
forexamplevaryingdatumheightsorotherspecialheightinformationonallmodels.
•Adatagramformatforinputoftidalheightisprovided.
TheGGAformatgivenbelowisaccordingtotheNMEA0183version2.30description.
TheGGKformatwasoriginallydenedbytheUSArmyCorpsofEngineersfortheir
testswithkinematicGPS.Trimble’sproprietaryversionoftheformat,PTNLGGK,is
supported.Ifanychangestotheformataremade,andifitbecomespartoftheNMEA
standard,thiswillbeimplemented.
TopreservetheinherentaccuracyofthekinematicGPSdataitisnecessarytocorrect
thedataforvesselmotion.Thisrequiresaccuratetimingsynchronisationbetweenthe
motionsensorandtheGPSreceiver.Itisthereforeimperativethat
•thepositiondatagramhasaconstantandknowntimedelay,
or
•thetimestampinthedatagramisactuallythetimeofthepositionx,that
synchronisationtothe1PPSsignaloftheGPSreceiverisenabled,andthatthesystem
clockhasbeensetcorrectly.
Asneitheroftheseconditionsmaynotbepossibletoachievewithasufcientaccuracy,
theapplicationofmotioncorrectionisoperatorselectable.Motioncompensationmaybe
appliedtomostofthepositioninputdatagrams.
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