卫星广播系统CMACast省级接收站缺收数据补调服务的设计与实现

Design and Implementation of Meteorological Data Downloading Service for CMACast Provincial Receiving Stations

中国气象局卫星广播系统(CMACast)在广播播发过程中存在接收小站文件错误接收或丢失的情况。建立数据下载中心,基于地面宽带网提供对广播缺收文件的补调下载,可以有效地解决上述问题。数据补调服务客户端完成了数据补调流程的建立,并设计了两级补调的机制以及灵活的可配置方式,在程序实现上采用多级并行处理、基于优先级的动态调度等方式来满足省级补调应用的需求。补调服务客户端已完成在省级通信系统的部署,在日常气象业务中发挥了实际效益。详细介绍了数据补调服务客户端的设计机制与实现方法,并对部署应用情况进行了分析。

Affected by satellite channel transmission errors,interference signals and rain attenuation,the files broadcasted by CMACast might be lost or received mistakenly at the receiving stations,resulting in an incomplete collection of broadcasting data,which further impacts the forecasting and other meteorological service.To build a data center and provide downloading service through the ground wideband network is an effective solution to cover the shortage of the satellite network.The data downloading client implements data downloading process to better meet the demands of the provincial-level downloading service,in which a two-stage downloading mechanism is designed and a flexible configurable mode is adopted.The client adopts such technologies as multi-level parallel processing and priority-based dynamic scheduling in the program.The downloading client has been deployed on the provincial telecommunication systems and received practical benefits in daily meteorological service.The mechanism and implementation of the downloading service are introduced in detail.