Estimation of QZSS differential code biases using QZSS/GPS combined observations from MGEX
| Autor: | Youjian Hu, Shuanggen Jin, Qisheng Wang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Quasi-Zenith Satellite System
Atmospheric Science 010504 meteorology & atmospheric sciences business.industry Aerospace Engineering Astronomy and Astrophysics Satellite system Geodesy 01 natural sciences Standard deviation Root mean square Geophysics Space and Planetary Science GNSS applications 0103 physical sciences Global Positioning System General Earth and Planetary Sciences Satellite Antenna (radio) business 010303 astronomy & astrophysics 0105 earth and related environmental sciences Mathematics |
| Zdroj: | Advances in Space Research. 67:1049-1057 |
| ISSN: | 0273-1177 |
| DOI: | 10.1016/j.asr.2020.10.049 |
| Popis: | As an important error source in Global Navigation Satellite System (GNSS) positioning and ionospheric modeling, the differential code biases (DCB) need to be estimated accurately, e.g., the regional Quasi-Zenith satellite system (QZSS). In this paper, the DCB of QZSS is estimated by adopting the global ionospheric modeling method based on QZSS/GPS combined observations from Multi-GNSS experiment (MGEX). The performance of QZSS satellite and receiver DCB is analyzed with observations from day of year (DOY) 275–364, 2018. Good agreement between our estimated QZSS satellite DCB and the products from DLR and CAS is obtained. The bias and root mean square (RMS) of DCB are mostly within ±0.3 ns. The day-to-day fluctuation of the DCB time series is less than 0.5 ns with about 96% of the cases for all satellites. However, the receiver DCB is a little less stable than satellite DCB, and their standard deviations (STDs) are within 1.9 ns. The result shows that the stability of the receiver DCBs is not significantly related to the types of receiver or antenna. |
| Databáze: | OpenAIRE |
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