Assessing the Positioning Performance Under the Effects of Strong Ionospheric Anomalies With Multi-GNSS in Hong Kong

Yangwei Lu, Zhenjie Wang, Shengyue Ji, Wu Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)


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.

Original languageEnglish
Article numbere2019RS007004
JournalRadio Science
Issue number8
Publication statusPublished - 1 Aug 2020


  • ionospheric anomaly
  • multi-GNSS
  • multipath
  • precise point positioning
  • ROTI
  • single-point positioning

ASJC Scopus subject areas

  • Condensed Matter Physics
  • General Earth and Planetary Sciences
  • Electrical and Electronic Engineering


Dive into the research topics of 'Assessing the Positioning Performance Under the Effects of Strong Ionospheric Anomalies With Multi-GNSS in Hong Kong'. Together they form a unique fingerprint.

Cite this