风云三号(FY-3)极轨气象卫星数据传输系统需通过广域网链路,将海量卫星观测数据从卫星接收站快速传送到资料处理中心。该文研究广域网加速技术,解决广域网链路中传输气象卫星海量观测数据延迟高、带宽利用低等难题。文中针对FY-3气象卫星观测数据传输量大、时效要求高的特点,分别分析了数据压缩、数据缓存和协议优化3种不同加速技术对卫星数据的传输优化效果,并根据分析结果提出了一种适用于气象卫星数据的广域网传输加速架构。该架构结合3种不同加速技术设计了TCP代理模块、数据段索引模块和HS-TCP传输模块以及相应算法分别实现了数据压缩与缓存和协议优化等功能。通过测试和实际运行表明:在该加速架构下卫星数据广域网传输速率提高了50%～243%。 The FY-3 polar-orbiting meteorological satellite data transmission system needs to transmit massive satellite observation data from the satellite receiving station to the data processing center through the WAN link. This paper studies WAN acceleration technology to solve the problem of high latency and low bandwidth utilization of meteorological satellite mass data transmitted over WAN links. According to the characteristics of large amount of FY-3 meteorological satellite data transmission and high requirement of aging, this paper analyzes the effect of data compression, data caching and protocol optimization on satellite data transmission respectively. According to the result of the analysis, Wide Area Network Transmission Acceleration Architecture for Meteorological Satellite Data. The architecture combines three different acceleration technologies to design the TCP proxy module, the data segment index module and the HS-TCP transmission module and the corresponding algorithms to achieve the functions of data compression and caching and protocol optimization, respectively. The test and actual operation show that the WAN data rate of satellite data has been increased by 50% -243% under the accelerated architecture.