DO-242A is an aviation system standard published by RTCA, Incorporated. It contains minimum aviation system performance standards (MASPS) for Automatic Dependent Surveillance-Broadcast (ADS-B). These standards specify operational characteristics that should be useful to designers, manufacturers, installers, service providers and users of an ADS-B system intended for operational use on an international basis. DO-242A provides a view of the system-wide operational use of ADS-B, but does not describe a specific technical implementation or design architecture meeting these operational and technical characteristics. Outline of contents Purpose and Scope Introduction System Overview Operational Applications Verification Procedures Operational Requirements General Requirements System Performance - Standard Operational Conditions ADS-B System Definition and Functional Requirements System Scope and Definition of Terms ADS-B System Description System Requirements ADS-B Messages and Reports ADS-B Subsystem Requirements ADS-B Functional Level Requirements Procedures for Requirement Verification Appendix A: Acronyms Appendix B: Definition of Terms Appendix C: Bibliography and References Appendix D: Near-Term ADS-B Applications Appendix E: Other Applications Appendix F: Efficient Spectrum Utilization Appendix G: Design Tradeoff Considerations Appendix H: Receive Antenna Coverage Constraints Appendix I: Integrity Considerations for ADS-B Applications Appendix J: Accuracy and Update Period Analysis Appendix K: Latency and Report Time Error Data Appendix L: Track Acquisition and Maintenance Requirements Appendix M: Examples of On-Condition Report Formats Appendix N: Intent Guidance Material for Future ADS-B Intent Broadcast Appendix O: Determination of Intent Information Exchange Requirements for Air-Air Encounter Alerting and De-Confliction Appendix Q: Future Air-Referenced Velocity (ARV) Broadcast Conditions Appendix R: Determining the Navigation Accuracy Category for Velocity () See also Automatic Dependent Surveillance-Broadcast DO-212, Minimum Operational Performance Standards for Airborne ADS Equipment DO-185A, Minimum Operational Performance Standards for Traffic Alert and Collision Avoidance System (TCAS) Airborne Equipment DO-184, Traffic Alert Collision Avoidance System (TCAS) I Functional Guidelines DO-236A, Minimum Aviation System Performance Standards: Required Navigation Performance for Area Navigation DO-243, Guidance for Initial Implementation of Cockpit Display of Traffic Information DO-229D, Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airborne Equipment DO-260, Minimum Operational Performance Standards for 1090 MHz Automatic Dependent Surveillance - Broadcast (ADS-B) DO-259, Application Descriptions for Initial Cockpit Display of Traffic Information (CDTI) Applications DO-246B, GNSS-Based Precision Approach Local Area Augmentation System (LAAS) Signal-in-Space Interface Control Document (ICD) DO-253, Minimum Operational Performance Standards for GPS Local Area Augmentation System Airborne Equipment DO-245, Minimum Aviation System Performance Standards for the Local Area Augmentation System (LAAS) RTCA standards Aviation standards