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- Title
Assessing the Positioning Performance Under the Effects of Strong Ionospheric Anomalies With Multi‐GNSS in Hong Kong.
- Authors
Lu, Yangwei; Wang, Zhenjie; Ji, Shengyue; Chen, Wu
- Abstract
Global navigation satellite system (GNSS) precise positioning performance will be strongly affected under severe ionospheric anomaly conditions. The combination of multi‐GNSS can increase the available observations and improve the geometry of continuously tracked satellites. This paper focuses on assessing the positioning performance with the combination of Global Positioning System (GPS), Global'naya Navigatsionnaya Sputnikova Sistema (GLONASS), and BeiDou System (BDS) around the St. Patrick's Day geomagnetic storm (9–18 March) in 2015 in Hong Kong. The rate of total electron content (TEC) index (ROTI) indicates severe ionospheric anomalies before the superstorm, while it was absent during the main phase of the storm in Hong Kong. Furthermore, strong scintillation events on signal‐to‐noise ratio (SNR) and multipath (MP) observables are observed during ionospheric anomalies period. Then the performance of single‐point positioning (SPP) and precise point positioning (PPP) with multi‐GNSS is shown. The ionospheric scintillation events may reduce pseudorange accuracy but affect SPP performance a little in this study, while the PPP accuracy is vastly decreased due to the subsequent reconvergence caused by frequent cycle slip (CS). Compared to PPP solutions with GPS only, the accuracy is improved significantly with the combination of multi‐GNSS. Key Points: Severe scintillation is observed several consecutive days before 17 March 2015 in Hong KongSignificant scintillation events on signal‐to‐noise ratio and multipath observables are observed in the runup to the super magnetic stormThe PPP performance is improved significantly with the combination of GPS/GLONASS/BDS during the ionospheric anomaly period
- Subjects
HONG Kong (China); GLOBAL Positioning System; TOTAL electron content (Atmosphere); MULTIPATH channels; MAGNETIC anomalies
- Publication
Radio Science, 2020, Vol 55, Issue 8, p1
- ISSN
0048-6604
- Publication type
Article
- DOI
10.1029/2019RS007004