System Description

System Description and Installation Manual for MXS ICD10004-01

Table 0-5256 ADS-B Target State Report Message Payload Structure Detail

Report Type and Structure ID

Byte Offset

Byte Name Field Description

RS0

(MSN)

RS0

(LSN

)

RS1 Report Type and Structure ID

RS1 0x5 0xF 0xF8 Target State Report; All data fields are supported

Report Type and Structure ID

The Most Significant Nibble (MSN) of the byte RS0 contains the Report Type. For the Target State

Report, this field will always contain a value of 0x5. This identifies the report as a Target State 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 that is reported.

The below table from D0-260B outlines the Structure ID layout:

Bit # Target State Data Parameter to be Reported

RS0 (LSN)

Selected Altitude :Selected Altitude Type

Selected Altitude: MCP/FCU Selected Altitude or FMS Selected Altitude

Barometric Pressure Setting (Minus 800 millibars)

Selected Heading

RS1

0-2

Mode Indicators: Autopilot Engaged

Mode Indicators: VNAV Mode Engaged

Mode Indicators: Altitude Hold Mode

Mode Indicators: Approach Mode

Mode Indicators: LNAV Mode Engaged

Reserved