Design and Implementation of Real Time Base Data Transmission System for Weather Radar

Abstract

Currently, the National Meteorological Information Center (NMIC) uses the FTP service for base data exchanged. After the volume-based file is generated, it will be uploaded to Provincial Meteorological Information Center (PMIC) by file polling, then forwarded to NMIC in the same way. The end-users can only retrieve data after volume scan finished, it’s not suitable for time-critical applications such as nowcasting, moreover file polling and forwarding between transfer nodes will introduce additional delay. In this paper, we propose a technique to reduce the delay introduced by transmission. After radial data is generated by the signal processor, it is sent to the server of PMIC immediately, the server will collect real-time radial data from dozens of sites simultaneously and forward them to the server of NMIC and servers of other agencies as required. In such a scheme, the radial data will be got in less than one-second delay by endusers. Radar base data can be archived in elevation and distributed to applications that need a fast update. The system builds an efficient and stable base data transmission and distribution network, which greatly improves the efficiency of data transmission and applications.