rootbrowseIAC-20B2session 66. Advances in Space-based Navigation Systems, Services, and ApplicationsPapers1. Optimal navigation satellite constellation spare strategy based on Petri Net2. CDGNSS Integer Ambiguity Recovery through Co-observation5. AURALIS: Analysing, Evaluating, Characterising and Locating GNSS Inteference from Space6. Real-time precise orbit determination of LEO satellites based on GNSS Pecise Point Position technology7. Satellite positioning determination by using the Earth Magnetic Field in the LEO8. The Future of Location Based Services: A Patent Landscape of Emerging Trends, Technologies and Stakeholders9. Ultra-high repetition rate of 100kHz satellite laser ranging and application10. Integrated GNSS and Multi Sensor Navigation System for LEO Satellites11. Denoising of Scintillated GNSS signal based on CEEMD-MFDFA Method13. Compatibility and Interoperability among Multi- GNSS15. An analysis of positioning performance based on LEO satellites