rootbrowseIAC-19B2session 66. Space-Based Navigation Systems and ServicesPapers1. Status of the Galileo services, Europe’s GNSS programme2. Analysis of Galileo technical innovations enabling sustainable future Space Traffic Management3. Tracking all satellites: adding time-synchronization to each groundstation in a network during post-processing by applying data fusion of signals and time-sources4. Architecture design of an ITAR-free Alternative-to-GNSS Navigation System for Assured PNT5. Spacecraft Navigation using Phase Tracking of X-ray Pulsar Signals6. Orbit and clock estimation of IRNSS using Indian NavIC receiver7. Metric Tracking Services in the Era of Optical Communications8. A Signal Processing Approach to GNSS Precise Positioning for Lunar Exploration9. coverage of the lunar surface by satellites on halo orbits and distant retrograde orbits10. positioning for earth's surface cruiser with the vision information by single satellite