System Description

System Description and Installation Manual for MXS ICD10004-01
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Table 0-4953 ADS-B Mode Status Report Message Payload Structure Detail
Report Type and Structure ID
Byte Offset Byte Name Field Description
00
RS0
RS0
(MSN)
RS0
(LSN)
RS1 RS2 Report Type and Structure ID
01
RS1 0x2
0x2
0x2
0x2
0x2
0xF
0xF
0xF
0xF
0xF
0x6E
0x7E
0xFE
0x7F
0xFF
0x60
0xE0
0xE0
0xE0
0xE0
Version 0 TargetVersion 1 Airborne Target
Version 1 Surface Target
Version 2 Airborne Target
Version 2 Surface Target
02
RS2
Report Type and Structure ID
The Most Significant Nibble (MSN) of the byte RS0 contains the Report Type. For the Mode Status Report, this
field will always contain a value of 0x2. This identifies the report as a Mode Status Report.
The remaining data constitutes the Structure ID, which indicates the fields that are being reported in the current
message. If the bit for the field is set to “ONE”, then the data field is available and included in the current report. If
the bit is set to “ZERO”, this indicates that the field is not reported for the current message and the Mode Status
message will not include that field. The Mode Status Message will concatenate the next field to be included into
the report, following the previous reported field. This is performed for each data field reported.
The below table from D0-260B outlines the Structure ID layout:
Byte Name Bit # Mode Status Data Parameter to be Reported
RS0 (LSN)
3
2
1
0
Time of Applicability
ADS-B Version
Call Sign
Emitter Category
RS1
7
6
5
4
3
2
1
0
A/V Length and Width Code
Emergency/Priority Status
Capability Codes
Operational Mode
SV Quality – NAC
P
SV Quality – NAC
V
SV Quality – SIL, SIL Supplement, SDA
SQ Quality – Geometric Vertical Accuracy (GVA)
RS2
7 SV Quality – NIC
BARO