Precipitable water vapor inversion based on BDS-3 in Guangzhou CORS
In order to evaluate the feasibility of BeiDou-3 global navigation satellite system(BDS-3)for meteorological application in Guangzhou,the paper studied the precipitable water vapor(PWV)inversion by using BDS-3 observations of 14 stations of Guang Zhou continuously operating reference system(GZCORS)from June 1 to 15,2023:the PWV principle of ground-based global navigation satellite system(GNSS)inversion was given.then the regional atmospheric weighted average temperature was constructed.Experimental results showed that the change trend of the zenith tropospheric delay(ZTD)time series of BDS-3 solution would be basically consistent with that of global positioning system(GPS)solution,and the correlation coefficients between BDS3-ZTD and GPS-ZTD would be both greater than 0.97;moreover,the correlation coefficient between BDS3-PWV,GPS-PWV and PWV calculated based on European Centre for Medium-range Weather Forecasts reanalysis v5(ERA5)would be greater than 0.87,and BDS3-PWV could well reflect the change of atmospheric water vapor;furthermore,using ERA5-PWV as the reference value,the mean root mean square(RMS)of BDS3-PWV for 14 GZCORS sites would be 2.98 mm,the maximum Bias 1.71 mm,and the minimum-2.34 mm;in general,the PWV of the BDS-3 inversion of GZCORS could be used for meteorological research.
global navigation satellite system(GNSS)meteorologyprecipitable water vapor(PWV)BeiDou-3 global navigation satellite system(BDS-3)weighted mean atmospheric temperature
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