Minimum Aviation System Performance Standards for Aircraft ...

3.5.1 ADS-B Messages and Reports
This section provides requirements and definition of ADS-B reports and the relationship
between these reports and the received messages. The ADS-B output report definitions
establish the standard contents and conditions for outputting data qualified for user
applications. Exchange of broadcast messages and report assembly considerations are
discussed in §3.5.1.2. Report data elements are specified in §3.5.1.3 to §3.5.1.8 and
standardized according to content, nomenclature, parameter type, applicable coordinate
system, logical content, and operational conditions. Reports required for each Equipment
Class and supporting message contents are defined in §3.4.3.2. Report contents and
message requirements are based on the information requirements summarized in Table 2-
6. These definitions provide the basis for:
• Independence between applications and broadcast link technologies
• Interoperability of applications utilizing different ADS-B technologies.
Specific digital formats are not defined since interface requirements will determine those
details. Such interfaces may be internal processor buses or inter-system buses such as
those described in ARINC, IEEE, and military standards. Additional information
requirements may develop in the future and result in expansion to the report definitions
specified in this document. ADS-B system designs should be sufficiently flexible to
accommodate such future expansion.
3.5.1.1 Report Assembly Design Considerations
Four report types are defined as ADS-B outputs to applications. They provide flexibility
in meeting delivery and performance requirements for the information needed to support
the operations identified in Section 2. Report types are:
� Surveillance State Vector Report (SV, §3.5.1.3);
� Mode Status Report (MS, §3.5.1.4);
� Various On-Condition Reports (OC, §3.5.1.5) – a category that includes the
following report types:
� Air Referenced Velocity Report (ARV, §3.5.1.6),
� Target State Report (TS, §3.5.1.7), and
� Other On-Condition Reports, which may possibly be defined in future versions
of this MASPS.
All interactive participants must receive messages and assemble reports specified for the
respective equipage class (Table 3.4.3.2a). All transmitting participants must output at
least the minimum data for the SV and MS reports. The minimum requirements for
exchanged information and report contents applicable for equipage classes are provided
in §3.4.3.2.
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