Simrad EK15 - PSIMDHB Bottom Hardness and Biomass

Telegramformats
12Cr=changerate;therateofchangeforthecurrentmeasurement,ortimecounter
forbottomandcatchsensors
13Q=quality:
14In=interference:
•0=Nointerference
•1=Interferencedetected
15SL=signallevel–thesignallevelofthetelemetrypulse,measuredindB
16NL=noiselevel–theaveragenoiselevelofthecurrentchannel,measuredindB
17G=thecurrentgain;0,20or40dB.
18Cb=cablequality:
•0=cableisnotconnected
•1=cableisOK
•2=ashortcircuit,orthehydrophonecurrentistoolarge
19error=errordetected–0whennoerrorisdetected,anumber>0indicatesanerror
condition
20chksum=Thechecksumeldconsistsofa"*"andtwohexdigitsrepresentingthe
exclusiveORofallcharactersbetween,butnotincluding,the"$"and"*"characters
PSIMDHBBottomhardnessandbiomass
ThisproprietarySimradtelegramcontainsthebottomhardnessandbiomassascalculated
byanechosounder.
Format
$PSIMDHB,hhmmss.ss,t,f,KHZ,x.x,M,y.y,DB,z.z,,,<CR><LF>
Formatdescription
1$P=talkeridentier(mandatory)
2SIM=SimradtalkerID
3DHB=coordinateduniversaltime(UTC)
4hhmmss.ss=time
5t=transducernumber
6f,KHZ=echosounderfrequencyinkHz
7x.x,M=detectedbottomdepthinmeters.GivenasDBS(depthbelowsurface),
assumingpropertransducerdrafthasbeenentered.
8y.y,DB=bottomsurfacehardnessindB
9z.z=relativebiomassdensityinm²/nmi²(NASC)(s
A
)
NASCmeansNauticalAreaScatteringCoefcient.Thisistheformat(s
A
m²/nmi²)
weprovidethebiomassdata.
10spare1=spareforfutureexpansions
11spare2=spareforfutureexpansions
351718/C
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