BDS signal-in-space anomaly probability analysis over the last 6 years
- 7 February 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in GPS Solutions
- Vol. 25 (2), 1-12
- https://doi.org/10.1007/s10291-021-01097-z
Abstract
Knowledge of the signal-in-space (SIS) anomaly probability is important for the integrity monitoring of satellite navigation. An efficient SIS anomaly detection method is indispensable for characterizing the probability of SIS anomalies with sufficient confidence. The traditional GPS anomaly detection method based on the zero-mean Gaussian distribution assumption of the instantaneous signal-in-space user range error (IURE) is not suitable for the emerging BeiDou navigation satellite system (BDS) because of the nonzero-mean, asymmetric distribution of the BDS IURE. By deliberately extracting the time series trend terms of the satellite orbit and clock errors, an SIS anomaly detection method with the worst user location protection principle is proposed based on 6 years of BDS data from March 2013 to March 2019. The detection results have shown that the probability of single-satellite SIS anomalies is at the 10−3 level and the probability of multiple-satellite SIS concurrent anomalies is at the 10−4 level. Meanwhile, the operational service performance provided by the BDS gradually improves over time.Keywords
Funding Information
- National Natural Science Foundation of China (61773132, 61633008, 61803115)
- National key research and development program (2017YFE0131400)
- 7th Generation Ultra Deep Water Drilling Unit Innovation Project
- Heilongjiang Province research Science Fund for Distinguished Young Scholars (JC2018019)
- Fundamental Research Funds for the Central Universities (HEUCFP201768, 3072019CF0401)
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