Inside GNSS Media & Research

MAY-JUN 2018

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4 InsideGNSS M A Y / J U N E 2 0 1 8 ON THE COVER 32 The Cospas-Sarsat MEOSAR System A Solution to Support ICAO GADSS Autonomous Distress Tracking Requirement Pauline Martin, ibaud Calmettes, Yoan Gregoire, Mercedes Reche, Christophe Chatain and Michel Monnerat Today, it appears that the Cospas-Sarsat MEOSAR system, relying on payloads deployed on GNSS constellations (GPS, Galileo, GLONASS), offers all the conditions to meet the new requirement of ICAO for ADT system for Commercial Aviation, with a new generation of in-flight triggered beacons, identical to the current ELT in terms of aircra integration, but capable of receiving triggers and cancellation events from the avionics, from the crew or from internal sensors, and of detecting and managing their inhibitions to maintain the capability to raise alerts and be localized in any situation. TECHNICAL ARTICLES 46 Multi-frequency Spoofing Challenging Our Assumptions About the Technical (In)Feasibility of Multi-Frequency Spoofing James T. Curran, Aiden Morrison and Cillian O'Driscoll Recent presentations and publications have suggested that multi-frequency spoofing is infeasible using low-cost, off-the-shelf equipment, and that a good defense against any but well-funded and technically competent adversaries would be to use a multi- frequency capable survey grade receiver. e authors of this article wish to demonstrate that this is definitively false. COLUMNS 24 Washington View GPS IIIF: e Air Force Decides to Stick With Lockheed Dee Ann Divis TABLE OF CONTENTS MAY/JUNE 2018 VOLUME 13 NUMBER 3 TOC BY THE NUMBERS 10 inking Aloud 12 360 Degrees 14 GNSS Hotspots ARTICLES 24 Washington View 32 Galileo SAR Return-Link Improvement Civil Aviation Safety 46 Multi- frequency Spoofing 53 Working Papers GNSS IoT Positioning DEPARTMENTS 64 Industry View 66 Advertisers Index 66 GNSS Timeline Cover photo from

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