The content of this article is from the "Surveying and Mapping Bulletin" No. 2, 2024, drawing review number: GS Jing (2024) No. 0287
Inversion of atmospheric precipitable water using BeiDou PPP-B2b service and analysis of rainstorm process in Hong Kong
Cheng Ankun, Wang Min, Meng Xin, Ji Rui, Sun Shuang
School of Geospatial Information, Information Engineering University, Zhengzhou, Henan, 450001
Funds: National Natural Science Foundation of China (42074014); Young Scientist Fund (42304043)
Key words: atmospheric precipitable precipitation inversion, precise single-point positioning, Beidou satellite navigation system, real-time satellite orbit clock error correction, short-term warning of heavy rain disaster
Citation format: Cheng Ankun, Wang Min, Meng Xin, et al. Inversion of Atmospheric Precipitation Using BeiDou PPP-B2b Service and Analysis of Rainstorm Process in Hong Kong[J]. Bulletin of Surveying and Mapping, 2024(2): 118-123. DOI: 10.13474/j.cnki.11-2246.2024.0221
Abstract:The precision point positioning service of the Beidou-3 satellite navigation system (PPP-B2b service) sends correction information to users through satellite B2b signals, which gets rid of the dependence on external communication and provides a new technical way for real-time inversion of atmospheric precipitable water (PWV). In this paper, the accuracy of PPP-B2b service inversion PWV is analyzed by experiments. The experimental results show that the difference RMS and STD between the PPP-B2b service inversion results and the post-hoc precision ephemeris product using CODE are 3.70 mm and 3.61 mm, the RMS and STD of the difference with the ERA5 reanalysis data are 4.80 mm and 4.07 mm, respectively, and the RMS and STD of the difference with the sounding result are 3.75 mm and 7.16 mm, respectively, which verifies that the PWV inversion results with PPP-B2b service have good accuracy. Finally, by analyzing the correlation between the actual precipitation during the rainstorm in Hong Kong and the PWV inversion results, the feasibility of BDS PPP-B2b service for short-term early warning of rainstorm disaster is preliminarily verified.
About author:CHENG Ankun (2001—), male, research direction is GNSS data processing. E-mail:[email protected] Corresponding author: Wang Min. E-mail:[email protected]
First trial: Ji Yinxiao review: Song Qifan
Final Judge: Jin Jun
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