Retrieval analysis of atmospheric precipitable water vapor from multi-system GNSS in the Guangdong-Hong Kong-Macao Greater Bay Area

doi:10.13474/j.cnki.11-2246.2023.0314

Abstract

Abstract: GNSS water vapor detection is an important technical means to reflect the formation and evolution of severe weather. In order to expand the operational application of Marine observation in the Guangdong-Hong Kong-Macao Greater Bay Area mainly based on BDS, this paper took coastal cities in the Greater Bay Area as an example, and selected August, which was heavily affected by Marine disasters such as typhoons, storm surges and heavy rainfall, to analyze the variation characteristics of multi-system GNSS atmospheric precipitation (PWV)using GPS,BDS,GLONASS,Galileo retrieval.The results show that, compared with radiosonde data, the correlation coefficients of each satellite system are all greater than 0.9, showing strong correlation and high inversion accuracy; Combined with the actual rainfall monitoring of meteorological stations in the experimental area, the accumulation of PWV will produce rainfall. The average PWV of all satellite systems in August is 53～60 mm, which is consistent with the spatial distribution of actual rainfall.Therefore, comprehensively considering the advantages of GNSS in ocean observation and disaster prevention and mitigation, it provides ideas for the layout of near-shore multi-mode GNSS network.

Key words: GNSS, precipitable water vapor, Guangdong-Hong Kong-Macao Greater Bay Area, retrieval analysis, the marine disaster

CLC Number:

P228

ZHU Xiaowu, DUAN Hongshan, CHEN Guoheng, LIU Lei. Retrieval analysis of atmospheric precipitable water vapor from multi-system GNSS in the Guangdong-Hong Kong-Macao Greater Bay Area[J]. Bulletin of Surveying and Mapping, 2023, 0(10): 163-167.

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