Abstract
The integrity and continuity of aircraft precision approach are the most significant performance requirements for aviation users. To ensure positioning integrity of users, it is necessary to detect type B ephemeris fault one of the main integrity risk sources of precision approach. Based on the repeatability of satellite motion period, the Yesterday’s Ephemeris minus Today’s Ephemeris (YE-TE) method is implemented to detect type B fault monitoring for Global Positioning System (GPS). But it is not suitable for BeiDou Navigation Satellite System (BDS) due to the significant differences between BDS and GPS’s orbital period and satellite type. Based on the sensitivity of satellite position error to variations in the broadcast ephemeris parameters, a Predict Ephemeris minus Today’s Ephemeris (PE-TE) method is proposed. It utilizes the extrapolation of different orders polynomials to acquire more accurate prediction parameter. The test statistics and the minimum detectable error (MDE) are constructed which reflect satellite position error. The results show that the test statistics and the MDE satisfy the continuity and integrity risk requirements of precision approach. Type B fault for BDS broadcast ephemeris can be effectively monitored by the proposed PE-TE method.
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Acknowledgements
This research was jointly funded by the National Natural Science Foundation of China (Nos. 61773132, 61633008, 61803115), the National Key Research and Development Program (No. 2017YFE0131400), the 7th Generation Ultra Deep Water Drilling Unit Innovation Project sponsored by Chinese Ministry of Industry and Information Technology, the Heilongjiang Province research Science Fund for Distinguished Young Scholars (No. JC2018019), and the Fundamental Research Funds for Central Universities (Nos. HEUCFP201768, 3072019CF0401, 3072019CFM0401). Thanks to the BDS broadcast ephemeris provided by IGS.
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Li, L., Liu, Y., Cheng, C., Li, H. (2020). Type B Fault Integrity Monitoring for BDS Broadcast Ephemeris. In: Sun, J., Yang, C., Xie, J. (eds) China Satellite Navigation Conference (CSNC) 2020 Proceedings: Volume II. CSNC 2020. Lecture Notes in Electrical Engineering, vol 651. Springer, Singapore. https://doi.org/10.1007/978-981-15-3711-0_54
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DOI: https://doi.org/10.1007/978-981-15-3711-0_54
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