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1090 Global

ESAVS Paper Series – Second Edition: Identifying Collision Avoidance Resolution Advisories and Anomalies in Aircraft Avionics Globally with Space-Based ADS-B Data Observations


This past fall, Aireon participated in and sponsored an event called, The International Symposium on Enhanced Solutions for Aircraft and Vehicle Surveillance Applications in Berlin, Germany. The Aireon team shared three papers at this conference which reveal some of the results of the most recent AireonSM system performance tests. We’d like to share these papers containing exciting performance results with you in a three-part blog series. Click here to read the first edition. 

Automatic Dependent Surveillance – Broadcast (ADS-B) equipage is rising, and mandates have been implemented in several regions around the globe.  Aireon has been closely monitoring and analyzing its space-based ADS-B data in preparation to report to governing bodies such as the European Aviation Safety Agency (EASA), EUROCONTROL, the Federal Aviation Administration (FAA), and the International Civil Aviation Administration (ICAO).

So far, we’ve seen a surprising variety of unique things captured within our data set such as weather balloons, surface vehicles and aircraft with hilarious aircraft IDs. Among our findings, we’ve also commonly observed non-compliant aircraft. Examples of non-compliant aircraft include aircraft transponders that do not adhere to the Minimum Operational Performance Standards (MOPS) and the rules outlined by ICAO. While we understand that some of these transponder issues are probably not intentional, we also recognize that governing bodies may be unaware of many of the non-compliant transponders.

These findings are important because they point to a major safety concern that could lead to dropped tracks in surveillance systems and missed alerts in traffic collision avoidance systems (TCAS).  This discovery also validates the need for a single global monitoring system, such as space-based ADS-B, since it has the ability to assist in filling in coverage gaps and can correlate preventative and corrective TCAS resolution advisory events.

As an active part of the aviation community and a safety-minded organization, Aireon plans to offer additional services and applications in support of achieving higher levels of global interoperability.

You can view Aireon’s detailed findings by reading the full paper, ‘Identifying Collision Avoidance Resolution Advisories and Anomalies in Aircraft Avionics Globally with Space-Based ADS-B Data Observations.  The paper outlines examples of non-compliant aircraft seen in Aireon’s data, methods of detecting non-compliance and proposes the implementation of global monitoring and reporting for regulatory agencies.

This paper is authored by Andy Hoag, Dr. Michael A. Garcia and John Dolan.