Simrad FS70 - REV 3 User Manual Page 277

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Telegramformats
isusedinsidethesysteminalldatadisplaysandinloggeddata(atransformationis
appliediftherollisgivenwithrespecttothehorizontal).
4Notethatheaveisdisplayedandloggedaspositivedownwards(thesignis
changed).Heaveiscorrectedforrollandpitch.
5ThisformatwasoriginallydesignedforusewiththeEM950andtheEM1000
multibeamechosounderswiththerstsynchronisationbytealwaysassumedtobe
zero.Thesensormanufacturerswasthenrequestedtoincludesensorstatusinthe
formatusingtherstsynchronisationbyteforthispurpose.Withthisadditional
informationadded,thedatagramformatisknownasKongsbergEMAttitude3000.
KongsbergEMAttitude3000
ThisproprietaryKongsbergbinarytelegramconsistsofaxedlength10-bytesmessage.
Itisdenedasfollows:
Byte1:Syncbyte1=00h,orSensorstatus=90h-AFh
Byte2:Syncbyte2=90h
Byte3:RollLSB
Byte4:RollMSB
Byte5:PitchLSB
Byte6:PitchMSB
Byte7:HeaveLSB
Byte8:HeaveMSB
Byte9:HeadingLSB
Byte10:HeadingMSB
LSB=leastsignicantbyte,MSB=mostsignicantbyte.
1Alldataarein2’scomplementbinary,with0.01°resolutionforroll,pitchand
heading,and1cmresolutionforheave.
Rollispositivewithportsideupwith±179.99°validrange
Pitchispositivewithbowupwith±179.99°validrange
Heaveispositiveupwith±9.99mvalidrange
Headingispositiveclockwisewith0to359.99°validrange
Non-validdataareassumedwhenavalueisoutsidethevalidrange.
2Youcandenehowrollisassumedtobemeasured,eitherwithrespecttothe
horizontalplane(theHippy120orTSSconvention),ortotheplanetiltedbythe
givenpitchangle(i.e.asarotationanglearoundthepitchtiltedforwardpointing
x-axis).Thelatterconvention(calledTate-BryantinthePOS/MVdocumentation)is
usedinsidethesysteminalldatadisplaysandinloggeddata(atransformationis
appliediftherollisgivenwithrespecttothehorizontal).
3Notethatheaveisdisplayedandloggedaspositivedownwards(thesignischanged)
includingrollandpitchinducedleverarmtranslationtothesystem’stransmit
transducer.
338106/C
275
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