Inside GNSS Media & Research

MAY-JUN 2018

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32 Inside GNSS M A Y / J U N E 2 0 1 8 O n June 1, 2009, the Air France AF447 flying from Paris to Rio experienced a stall that led to the crash of the aircra in the Atlantic Ocean with 228 passengers and crew members onboard. As the aircra was transmitting its location nominally only every 10 minutes, the location of the accident site could not be determined with a good accuracy. e search efforts to recover the wreck and the flight data recorder lasted almost 2 years, involv- ing significant aeronautical, maritime and sub-maritime equipment, leav- ing open the threat that the still unex- plained cause of the accident could be at the origin of a similar one in the mean- time. Finally, the wreck and the victims were localized in spring 2011 thanks to a submarine robot. e total cost of the operations amounts to more than €34 million, or about $41 million US dollars. Later, on March 8, 2014, the Malay- sia Airlines MH370 flying from Kuala Lumpur to Beijing disappeared with its 239 passengers and crew members. Four years later, the mystery remains despite the more than 33 months of research and the approximate amount of $200 million US dollars spent in the recover- ing operations by 26 countries. Contrary to the case of the AF447, the MH370 was not even transmitting its location every 10 minutes and all communication links with the aircra were shut down. ese two tragedies have highlighted the limitations of the existing air naviga- tion and distress systems: with extensive identification and localization delay of the aircra in distress, the effectiveness of Search And Rescue (SAR) efforts and recover y operations is dramatically reduced. In both cases, no distress mes- The Cospas-Sarsat MEOSAR System PAULINE MARTIN THALES ALENIA SPACE THIBAUD CALMETTES THALES ALENIA SPACE YOAN GREGOIRE CNES MERCEDES RECHE PILDO LABS CHRISTOPHE CHATAIN ECAGROUP MICHEL MONNERAT THALES ALENIA SPACE Today, it appears that the Cospas-Sarsat MEOSAR system, relying on payloads deployed on GNSS constellations (Galileo, GPS, GLONASS), offers all the conditions to meet the new recommendation 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 aircraft 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. In this article the authors address how the Cospas-Sarsat MEOSAR system offers a solution to support the ICAO GADSS Autonomous Distress Tracking Recommendation. A Solution to Support ICAO GADSS Autonomous Distress Tracking Recommendation

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