On the relationship between GPS and radiosonde observations of precipitable water vapor and precipitation

• Main Authors: Wen Chien-Chen, 陳文建
• Other Authors: Yuei-An Liou
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/psarc8

碩士 === 國立中央大學 === 太空科學研究所 === 94 === There are some relationship between the amount of water vapor in the atmosphere and rainfall. The goal of this investigation is to study the relationship between precipitable water (PW) and rainfall. Two data sets are used, namely radiosonde data acquired at the Taipei and Hualien weather station of Central Weather Bureau (CWB) from year 1991 to year 2005, and data of ground based GPS station operated by PEPU 2003.Then put the surface temperature (Ts) data of PEPU GPS station, the nearest GPS station near Hualien radiosonde station (the distance between these two stations is about 4.6km), in 2003 into the PWs estimation model made by Hualien radiosonde station and use the PW data estimated by PEPU GPS station to get the continuous time RHs at PEPU GPS station. Furthermore, use the data of automatic rainfall station (the distance between rainfall station and GPS station is about 1.3km) to get the change of RHs in front and behind the typhoons in each month at PEPU station indirectly. And then make sure that RHs has more sensitivity and accuracy in precipitation than RH.