REALIZATION OF QUICK-LOOK IMAGING FOR SPACEBORNE SAR BASED ON PARALLEL PROCESSING

Large range cell migration is a severe challenge to imaging algorithm for spaceborne SAR. Based on design of Finite Impulse Response (FIR) filter and Range Doppler (RD) algorithm, a realization of quick-look imaging for large range cell migration is proposed. It realized quick-look imaging of 8 times reduced resolution with parallel processing on memory shared 8 CPU SGI server. According to simulation experiment, this quick-look imaging algorithm with parallel processing can image 16384x16384 SAR raw data within 6 seconds. It reaches the requirement of real-time imaging.

多路高速遥感数据记录快视与格式化系统设计与实现

针对亚米级分辨率商业遥感卫星吉林一号A星数据传输的多通道和高码速率特点,以及数据记录、快视和格式化处理的需求,采用"平台+插件"的技术体制,以通用的服务器作为计算平台,以商用GPU卡作为数据并行处理的加速硬件,以插件式的思想设计系统软件模块。系统已在机动式遥感接收站中得到了验证和应用,取得了较好的效果。结果表明,系统设计在硬件方面具有一定的通用性,软件方面具有一定的可扩展性。