February 24, 2026
New Publication: ED-102B Integrated Change 1 and Change 2

We are pleased to announce the publication of ED-102B Integrated Change 1 and Change 2 “MOPS for 1090 MHz Extended Squitter ADS-B and TIS-B”.

The scope of the WG-51 standardisation activity covers all elements of ground and aircraft infrastructure elements specific to ADS-B, in support of both ground use (“ADS-B Out”) and aircraft use (“ADS-B In”). The ADS-B link technology elements covered by WG-51 are ADS-B 1090 MHz Extended Squitter (joint activity with RTCA SC-186) and VDL4 (WG-51 European-only activity, currently dormant). In addition, WG-51 develops Technical Specifications for composite ADS-B Out / Wide Area Multilateration (WAM) Systems. WG-51 is organised as a Plenary group and four Sub-Groups of which three are currently active. These Sub-groups are responsible for the development of standard material in the following Domains: – 1090 MHz Extended Squitter MOPS and maintenance thereof (SG-1); – SPR documents for ADS-B airborne and ground surveillance applications as well as aircraft system MOPS (and possibly MASPS) material (SG-3); -Technical Specifications for ADS-B and Wide Area Multilateration (WAM) composite surveillance Systems (SG-4). In the development of ED-102B/DO-260C, WG-51 works in coordination with RTCA SC-186 Automatic Dependent Surveillance Broadcast. Furthermore WG-51 is part of the Combined Surveillance Committee with WG-49 and RTCA SC-209.

This document complements ED-102B (December 2020). It includes updates, corrections, and additional material to support implementation of the Minimum Operational Performance Standards. The main item addressed in these changes is a modification to the Traffic Uplink Management Message in order to ensure backward compatibility with the Version 2 TIS-B/ADS-R Surface Status Message.

Congratulations to the experts of WG-51 Automatic Dependent Surveillance – Broadcast (ADS-B), chaired by Johan Martensson (EUROCONTROL), and RTCA SC-186, for their outstanding contributions!

You can download the document here.

Do you want to learn more about WG-51? Click here.

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