Precipitable Water Vapor Derived from Ground-Based GPS: From GPS Measuring Data to Meteorological Parameters

GPS meteorology is a boom cross-discipline with multiply discipline, and it´s a new technology by collecting GPS measuring data to extract meteorological parameters contained in it. Deriving precipitable water vapor from ground-based GPS is one of the important researches. Ground-based GPS network in Chengdu plain is the first network of being continuous and real time in Sichuan region. Chengdu station is the center of the network, other five stations outside constructs a steady polygon measuring frame. This network has run since September 2007. The time series of real time GPS-PWV is retrieved from observation data of being high spatial-temporal resolution, continuous, whole day and real time supplied by GPS network. The application system of water vapor monitoring by ground-based GPS is constructed based on that. It supplies instruction for monitoring atrocious weather and short-time weather forecast, establishes the foundation for studying spatial-temporal distribution of atmospheric water vapor and exploiting atmospheric water resource through many disciplines.