Abstract:Comparative analyses is made to the precipitable water vapor (PWV) with hourly intervals derived from 9 GPS stations of the Chinese coastal GPS network, using the observation data from radiosonde, ground-based water vapor radiometer (WVR). The results show the annual correlation coefficient of precipitable water vapor between ground-based GPS and radiosonde is above 0.95 and the mean bias gradually increases from north to south. The annual average deviation of the GPS stations (Xisha is excluded) is less than 2 mm and RMSE is less than 3 mm with evitable seasonal change. Compared with ground-based water vapor radiometer, the correlation coefficient reaches an even better value of 0.989. During the synchronous observation period, their mean deviation is 1.84 mm and the RMSE is 2.06 mm with maximum values occurring in July, August and September.
WANG Zhaoyang,ZHOU Xinghua,LU Yongduo et al. Accuracy Analysis on Precipitable Water Vapor Derived from Chinese Coastal GPS Measurement[J]. jgg, 2016, 36(12): 1060-1063.