System Description
SystemDescriptionandInstallationManualforRangeFinder ICD10000‐01
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8.3.7 TargetRequestMessage:Type0x0B
ThismessageisusedtorequestdataonADS‐B,TIS‐BandADS‐RtargetsbeingtrackedbytheRangeFinder.
AnoverviewoftheTargetRequestMessageisshowninTab le8‐19.Table8‐20providesthedetailedmessage
definition.Anexampleofmessagecontentisfound
inTable8‐21.
Table8‐19TargetRequestMessagePayloadStructureOverview
PayloadIndex MessageField Numberbytes
00 RequestType 1
01 NumberofParticipants 2
03 ParticipantID 3
06 RequestedReports 1
Table8‐20TargetRequestMessagePayloadStructureDetail
RequestType
ByteOffset ByteName FieldDescription
00 RT0 RequestType
0=TurnonAuto‐OutputofspecifiedreportsforNumberofTargets
10
1=ReturnSummaryof#Targets(andturnoffAuto‐Output)
10
2=ReturnrequestedreportsforTargetID(andturnoffAuto‐Output)
3=Turnoffallreportoutput.
NumberofParticipants
ByteOffset ByteName FieldDescription
01 NP0 NP0 NP1 #Participants
02 NP1 0x00
0x00
0x01
0x01
0x20
0xFF
0x00
0x90
32
255
256
404
NumberofParticipants(Forrequesttypes0and1only)
Values0to404accepted.
Allowsupto400targetsand3ICAOaddressduplicates,plusownship.
Iftherequestednumberofparticipantsislessthanthenumberdetected,onlytheclosestparticipants
arereported(includingownship,ifrequested,andduplicates).Ifreportingownshipisselectedinthe
SelectedReportsfield,in conjunction withturningonauto ‐report,theownship is countedamongthe
numberoftargets.IfNumberofTargetsis1andOwnshipisselectedthenasingletargetisreported:
ownship.
10
NumberofParticipantsfieldneedstobecompletedforRequestTypes0and1.
Checksum 8‐bitarithmeticsumofmessagefromStartBytetolastbyteofthePayloadData. [39 ]