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

1. Purpose and Scope
   1. Introduction
   2. System Overview
   3. Operational Applications
   4. Verification Procedures
2. Operational Requirements
   1. General Requirements
   2. System Performance - Standard Operational Conditions
3. ADS-B System Definition and Functional Requirements
   1. System Scope and Definition of Terms
   2. ADS-B System Description
   3. System Requirements
   4. ADS-B Messages and Reports
   5. ADS-B Subsystem Requirements
   6. ADS-B Functional Level Requirements
4. 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 (${\displaystyle \mathrm {NAC} _{v}}$)

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)