Position Error Analysis of Carrier-based DGNSS Systems Under Ephemeris Fault Conditions
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참고문헌
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초록
The carrier-based differential global navigation satellite system (CD-GNSS) has been garnering significant attention as a promising technology for unmanned vehicles for its high accuracy. The CD-GNSS systems to be used for safety-critical applications should provide a certain level of integrity. The integrity of these systems must be analyzed under various conditions, including fault-free and satellite fault conditions. The systems should be able to detect the faults that can cause large biases on the user position errors and quantify the integrity risk by computing the protection level (PL) to protect the user against the faults that are left undetected. Prior work has derived and investigated the PL for the fault-free condition. In this study, the integrity of the CD-GNSS system under the fault condition is analyzed. The position errors caused by the satellite’s fault are compared with the fault-free PL (PL_H0) to verify whether the integrity requirement can be met without computing the PLs for the fault conditions. The simulations are conducted by assuming the ephemeris fault, and the position errors are evaluated by changing the size of the ephemeris faults that missed detection. It was confirmed that the existing fault monitors do not guarantee that the position error under the fault condition does not exceed the PL_H0. Further, the impact of the faults on the position errors is discussed.
Abstract
The carrier-based differential global navigation satellite system (CD-GNSS) has been garnering significant attention as a promising technology for unmanned vehicles for its high accuracy. The CD-GNSS systems to be used for safety-critical applications should provide a certain level of integrity. The integrity of these systems must be analyzed under various conditions, including fault-free and satellite fault conditions. The systems should be able to detect the faults that can cause large biases on the user position errors and quantify the integrity risk by computing the protection level (PL) to protect the user against the faults that are left undetected. Prior work has derived and investigated the PL for the fault-free condition. In this study, the integrity of the CD-GNSS system under the fault condition is analyzed. The position errors caused by the satellite’s fault are compared with the fault-free PL (PL_H0) to verify whether the integrity requirement can be met without computing the PLs for the fault conditions. The simulations are conducted by assuming the ephemeris fault, and the position errors are evaluated by changing the size of the ephemeris faults that missed detection. It was confirmed that the existing fault monitors do not guarantee that the position error under the fault condition does not exceed the PL_H0. Further, the impact of the faults on the position errors is discussed.
참고문헌 (14)
- Moon-Beom Heo, "Carrier phase navigation architecture for shipboard relative GPS", IEEE Transactions on Aerospace and Electronic Systems, 42(2), pp.670~679 (2006), Institute of Electrical and Electronics Engineers (IEEE)[DOI]
- Khanafseh, S. M., "GPS navigation algorithms for autonomous airborne refueling of unmanned air vehicles", PhD, pp.2008
- Samer M. Khanafseh, "Autonomous Airborne Refueling of Unmanned Air Vehicles Using the Global Positioning System", Journal of Aircraft, 44(5), pp.1670~1682 (2007), American Institute of Aeronautics and Astronautics (AIAA)[DOI]
- Jiyun Lee, "Monitoring Global Positioning System Satellite Orbit Errors for Aircraft Landing Systems", Journal of Aircraft, 43(3), pp.799~808 (2006), American Institute of Aeronautics and Astronautics (AIAA)[DOI]
- Luo, N., "Precise Relative Positioning of Multiple Moving Platforms Using GPS Carrier Phase Observables", PhD, pp.2001
- Misra, P., "Global Positioning System: Signals, Measurements, and Performance" (2006), Ganga-Jamuna Press
- BORIS PERVAN, "Performance Analysis of Carrier-Phase DGPS Navigation for Shipboard Landing of Aircraft", Navigation, 50(3), pp.181~191 (2003), Institute of Navigation[DOI]
- Pullen, S., "Ephemeris protection level equations and monitor algorithms for GBAS", 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001), pp.1738~1749 (2001)
- Rife, J., "Navigation, interference suppression, and fault monitoring in the sea-based joint precision approach and landing system", Proceedings of the IEEE, 96, pp.1958~1975 (2008)
- Rife, J., "The impact of measurement biases on availability for CAT III LAAS", the 61st Annual Meeting of The Institute of Navigation, pp.759~773 (2005)
- Minimum aviation system performance standards for the local area augmentation system, "RTCA", ~, pp.RTCA DO-245A (2004)
- CURTIS A. SHIVELY, "Availability Enhancements for CAT IIIB LAAS", Navigation, 51(1), pp.45~57 (2004), Institute of Navigation[DOI]
- P. J. G. Teunissen, "The least-squares ambiguity decorrelation adjustment: a method for fast GPS integer ambiguity estimation", Journal of Geodesy, 70(1-2), pp.65~82 (1995), Springer Science and Business Media LLC[DOI]
- Teunissen, P. J. G, "GNSS ambiguity bootstrapping: theory and application", Proceedings of KIS2001, pp.246~254 (2001), University of Calgary