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- Title
Verification and Accuracy Analysis of Single-Frequency Occultation Processing Based on the BeiDou Navigation System.
- Authors
Li, Ruimin; Du, Qifei; Yang, Ming; Tian, Haoran; Sun, Yueqiang; Meng, Xiangguang; Bai, Weihua; Wang, Xianyi; Tan, Guangyuan; Hu, Peng
- Abstract
GNSS single-frequency occultation processing technology has the advantage of simple instrumentation, but it is not clear about the accuracy of the Beidou-based single-frequency occultation processing. This paper verifies the single-frequency occultation processing algorithm of the BeiDou navigation system (BDS) and analyzes its accuracy based on occultation observation data from the FY3E satellite. The research aimed to verify the single-frequency ionospheric relative total electron content (relTEC), analyze the accuracy of the reconstructed second frequency B 3 ∗ 's excess phase Doppler, and analyze the accuracy of the refractive index products. Results: (1) As for relTEC and excess phase Doppler, the correlation coefficient between single-frequency occultation processing and dual-frequency occultation processing is greater than 0.95. (2) The relative average deviations of the excess phase Doppler of B 3 ∗ are mostly less than 0.2%, and the relative standard deviations are mostly around 0.5%. (3) The bias index and root mean square index of single/dual-frequency inversion have good consistency compared with ERA5 data. All the results show that the single- and dual-frequency inversion refractive index products have comparable accuracies, and the accuracy of the standard deviation of single-frequency inversion refractive index products over 25 km being slightly lower than that of dual-frequency inversion refractive index products.
- Subjects
BEIDOU satellite navigation system; REFRACTIVE index; GLOBAL Positioning System; STANDARD deviations
- Publication
Atmosphere, 2023, Vol 14, Issue 4, p742
- ISSN
2073-4433
- Publication type
Article
- DOI
10.3390/atmos14040742