rootbrowseIAC-11B2session 55. Space Navigation Systems and ServicesPapers1. Increasing Civil Capabilities in the Modernized GPS Era2. Variation of Total Electron Content and Their Effect on GNSS Over Akure, Nigeria.3. GPS pseudo range error analysis with precise ISS structure modeling between HTV and ISS navigation4. Orbital monitoring of Automatic Dependent Surveillance -- Broadcast (ADS-B) signals for improved air traffic surveillance in remote and oceanic airspace5. Radionavigation satellite service (RNSS) and the ITU Radio Regulations6. Global clock synchronization for a satellite array in space7. Spacecraft navigation by the space objects’ radio emission8. A comparison of attitude determination methods: theory and experiments9. Application Research of PHMI Dynamic Allocation based on VFODP Theory in RAIM Algorithm10. A novel acquisition architecture for GNSS receiver based on down sampling and CORDIC algorithm11. Research of autonomous orbit determination of navigation constellation using satellite-to-satellite tracking data12. Method of improving accuracy of automated orbit determination for GEO satellites using GPS13. Positioning Precision Analysis of COMPASS Integrated With GPS