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Analysis of Post-Processed Pseudorange-Based Point Positioning with Different Data Sources for the Current Galileo
1College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China.
Sensors (Basel, Switzerland)
|April 27, 2024
Summary
Galileo satellite navigation offers improved positioning accuracy over GPS, especially with dual-frequency observations. Data completeness from institutions like IGS is crucial for optimal Galileo Single Point Positioning (SPP) performance.
Area of Science:
- Satellite Navigation Systems
- Geodesy and Geomatics Engineering
Background:
- The Galileo satellite navigation system is operational, with ongoing improvements and service introductions.
- Assessing the quality and completeness of broadcast ephemeris data is vital for system performance.
Purpose of the Study:
- To comprehensively analyze Galileo Single Point Positioning (SPP) performance using various broadcast ephemeris data sources.
- To evaluate the completeness of Galileo navigation message records from different institutions.
Main Methods:
- Analysis of Galileo navigation message completeness from multiple data providers (IGS, IGN).
- Proportion analysis of different ephemeris data types (FNAV_258, INAV_513, INAV_516, INAV_517).
- Comparison of SPP solutions for GPS and Galileo using different data sources and dual-frequency observations.
Main Results:
- IGS provides the highest data completeness (>70%), while IGN shows the lowest.
- FNAV_258 and INAV_517 ephemeris data exhibit better completeness than INAV_513 and INAV_516.
- Galileo SPP accuracy exceeds GPS, with higher data completeness (ECR) correlating with better performance.
- Dual-frequency observations significantly improve positioning accuracy and reduce data dispersion.
Conclusions:
- Galileo's SPP accuracy is superior to GPS, particularly when utilizing complete and high-quality ephemeris data.
- Data completeness is a critical factor influencing the performance of satellite navigation systems.
- Dual-frequency observations are essential for enhancing the precision and reliability of Galileo positioning.
Keywords:
GNSSGPSGalileodifferent data sources of broadcast ephemerispositioning performancesingle point positioning (SPP)More Related Videos
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