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The Galileo support to the Search and Rescue Programme (SAR/Galileo)

The Galileo support to the Search and Rescue Programme (SAR/Galileo). Outline. How SAR/Galileo integrate with Cospas-Sarsat service? SAR/GALILEO ARCHITECTURE GROUND SEGMENT CONCEPT DOWNLINK COORDINATION

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The Galileo support to the Search and Rescue Programme (SAR/Galileo)

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  1. The Galileo support to the Search and Rescue Programme (SAR/Galileo)

  2. Outline • How SAR/Galileo integrate with Cospas-Sarsat service? • SAR/GALILEO ARCHITECTURE • GROUND SEGMENT CONCEPT • DOWNLINK COORDINATION • Does improvement of location of alerts imply that ship borne EPIRBs be fitted with GNSS receiver? • SAR/GALILEO EXPECTED SERVICE PERFORMANCE • Does the implementation of the return link imply that ship borne EPIRBs be fitted with GNSS receiver?

  3. SAR/Galileo MISSION REQUIREMENTS and BENEFITS • FULL BACKWARD COMPATIBILITY WITH COSPAS-SARSAT SYSTEM • ENHANCEMENT OF EXISTING SAR AIDED TRACKING SYSTEM: - IMPROVEMENT OF PERFORMANCE: • Multi satellite visibility • Quasi real-time distress detection • Increased distress location accuracy - INTRODUCTION OF NEW SERVICES: • Implementation of a return link • FACILITATING LOW-COST SAR USER EQUIPMENT WITH INTEGRATED GALILEO RECEIVERS (« ADVANCED BEACONS »)

  4. Support to Search And Rescue Services Capacity Capacity Each satellite capable to relay Each satellite capable to relay signals from 150 simultaneously signals from 150 simultaneous active beacons active beacons Message received at MEOLUT Detection Probability in < 5 min with P > 0.99 < 5 Km with P > 0.95 Location Error Probability Acknowledgement Data Rate Acknowledgement Data Rate (Return Link service) 6 messages of 100 bits each per 6 messages of 100 bits each per minute minute 99.8% Availability Availability

  5. Galileo satellite with SAR Payload SAR Tx antenna (L band) SAR Rx antenna (406 MHz) Navigation antenna

  6. Integration of the MEOSAR component in the International SAR Satellite System GEO Satellites MEO Satellites 1544MHz 406 MHz LEO Satellites Rescue Team LUT Rescue Coordination Center Mission Control Center Emergency beacon

  7. SAR/Galileo Interfaces and Data Flow 13 Galileo Space Segment SAR payload Navigation payload 12 1 Galileo Ground Segment 2 Mission Up-link (ULS) 11 Distress Beacon MGF ISSS Ground Segment 10 MEOLUT MCC MCF 3 RLSP A 9 6 D 7 8 Nodal MCC SPF B 4 C 5 SAR Operators RCC

  8. SAR/Galileo Ground Segment concept • SAR/Galileo CONCEPT WILL FACILITATE INTERNATIONAL COOPERATION FOR THE PROVISION OF THE GROUND SEGMENT: - MEOLUT COVERAGE: Six MEOLUTs are sufficient for global coverage - OMNI DIRECTIONAL ANTENNA MEOLUT: Simple concept, should reduce implementing costs and facilitate operations • SAR/Galileo RETURN LINK OPERATIONS REQUIRE THE DETAILED DEFINITION OF INTERFACES BETWEEN THE GALILEO GROUND SEGMENT AND THE SAR OPERATIONAL GROUND SEGMENT

  9. Coverage area of a MEOLUT Common visibility between the beacon and the MEOLUT for 100% of the time of at least N satellites Coverage: localisation inside REQs  5,000 Km radius

  10. Downlink spectrum

  11. Sharing the available downlink spectrum

  12. SAR/Galileo expected performance (number of satellites in view) Beacon localisation error for 3 to 6 MEOs in common view

  13. SAR/Galileo expected performance (evolution with time) Localisation of non-GNSS equipped Beacons (red line is the current requirement)

  14. Summary andconclusion (1/2) • SAR/Galileo will be the European MEOSAR component for the support to the International Search and Rescue Programme • The MEO constellation is a unique opportunity to improve the existing international SAR system: permanent availability of space segment; favourable space to Earth geometric configurations, synergy with the navigation information. • Several MEO initiatives are been considered alongside Galileo: GPS / SAR and GLONASS/ SAR

  15. Summary and conclusions (2/2) • SAR/Galileo service will provide an enhanced support by: • Near real-time alert localisation and message detection • Higher beacon localisation error (below 2 Km average in less than 5 min) • Return link service (false alert rate reduction) • High availability • Global coverage • Ground segment concept will simplify operations

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