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GNSS World of China
GNSS World of China
| Citation: |
LIU Zhaoyan, LUO Xinlei, LI Bingqing, LI Guangcai, SONG Chuanfeng. Evaluation of GNSS cycle slip detection and location under ionospheric anomaly[J]. GNSS World of China, 2025, 50(1): 1-8. DOI: 10.12265/j.gnss.2024215
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Ionospheric anomaly generate negatively affect for the reliability and positioning accuracy of GNSS. Evaluating and reduction the impact of ionospheric anomaly on the observation quality of GNSS is a prerequisite for ensuring the stability of GNSS position services. In this paper, we select three ionospheric anomaly events in 2023. The performance for cycle slip detection of the MW combination and the differential GF combination is compared using pseudorange and carrier phase from four BDS GEO satellites. Meanwhile, the impact of ionospheric anomaly on the GNSS position performance is evaluated using PPP static displacements. The results show that: 1) there may be undetected cycle slip for the MW combination and the differential GF combination relying on fixed thresholds, may have a weekly jump omission. 2) the positional accuracies in three components are significantly reduced, with a more pronounced effect on the elevation direction.
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