System Description

SystemDescriptionandInstallationManualforRangeFinder ICD1000001
©SagetechCorporation2018ConfidentialProprietaryExportControlled Page91of130
Table856ADSBAirReferencedVelocityReportMessagePayloadStructureDetail
ReportTypeandStructureID
ByteOffset ByteName FieldDescription
00 RS0 RS0(MSN) RS0(LSN) RS1 ReportTypeandStructureID
01 RS1 0x4 0x0 0x07 AirReferencedVelocityReport;Alldatafieldsaresupported
ReportTypeandStructureID
TheMostSignificantNibble(MSN)ofthebyteRS0containstheReportType.FortheAirReferencedVelocityReport,
thisfieldwillalwayscontainavalueof0x4.ThisidentifiesthereportasanAirReferencedVelocityReport.
TheremainingdataconstitutestheStructureID,whichindicatesthefieldsthatarebeingreportedinthecurrent
message.Ifthebitforthefieldissetto“ONE”,thenthedatafieldisavailableandincludedinthecurrentreport.If
thebitissetto“ZERO”,thisindicatesthatthefieldisnotreportedforthecurrentmessageandtheModeStatus
messagewillnotincludethatfield.TheModeStatusMessagewillconcatenatethenextfieldtobeincludedintothe
report,followingthepreviousreportedfield.Thisisperformedforeachdatafieldthatisreported.
ThebelowtablefromD0260BoutlinestheStructureIDlayout:
ByteName Bit# AirReferencedVelocityDataParametertobeReported
RS0(LSN) 03 Reserved
RS1 37
2
1
0
Reserved
Airspeed
AirspeedTypeandValidity
HeadingWhileAirborne
ValidityFlags
ByteOffset ByteName FieldDescription
02 VF0 Byte Bit DataField(s)
VF0 27
1
0
Reserved
Airspeed
Heading
ValidityFlags:Theseflagsindicatewhetherornotthedatacontainedinthespecifiedfieldisvalidor
not.Ifthebitissetto“ONE”thenthedatafieldcontainsvalidinformation.Ifthebitissetto“ZERO”
thenthedatafieldcontainsinvalidinformation.
ParticipantAddress
ByteOffset ByteName FieldDescription
03 PA0 PA0 PA1 PA2 ParticipantAddress
04 PA1 0x1C
0x2A
0xA6
0x35
0xB2
0x6A
1CA6B2
2A356A
05 PA2
ParticipantAddressBytes
Containstheaddressofthetransmittinginstallation.Thesefieldscontainupto6hexcharacters.This
canbetheICAOaddressorsomeothertypeofaddress.
AddressQualifier
ByteOffset ByteName FieldDescription
06 AQ0 AQ0 AddressQualifierDescription
AddressQualifierByte
Indicatesthetypeofparticipantaddressbeingreportedandwhattheemittercategoryissettofor
thegivenparticipant.SeeStateVectorReport(section8.4.8.2)forexamples.