rootbrowseIAC-17B2session 55. Space-Based Navigation Systems and ServicesPapers1. Satellite-based Search and Rescue System in the Presence of Multiple Beacons2. Looking at the future governance of Galileo3. A Stochastic Constellation Replenishment Planner for Galileo Second Generation4. tiangong-2's precise orbit determination : preliminary results6. Joint Japanese and Australian Project to Demonstrate the Benefits of QZSS Precise Positioning for Autonomous Tractors7. Identifying Ionospheric Scintillation in the South Atlantic Magnetic Anomaly using motion-affected GPS data from a ship-based receiver.8. Time-Synchronization impact on the performance of the Distributed Ground Station Network service for tracking CubeSats and further signal sources9. Inertially Aided Vector Matching for Opportunistic Navigation in Space10. In-Situ Navigation and Timing Services for the Human Mars Landing Site