高分多模卫星星地一体化快速响应系统 设计与在轨验证

Design and On-orbit Verification of Ground-to-satellite Integrated System Supporting Rapid Response of GFDM-1 Satellite

高分多模卫星采用星地一体化设计,实现了星上处理及信息快速生成分发,将遥感信息的快速响应时间缩短到了分钟级。文章详细描述了高分多模卫星基于星上处理系统(区域提取与处理单元)、数据传输与分发系统(数传分系统),以及地面接收与处理系统的星地一体化快速响应系统架构;开展了辐射校正、几何校正等星地一体化设计方法论证,以及在轨图像定位精度关键指标精度分析。通过高分多模卫星在轨试验完成了快速响应时间及关键指标的在轨评估验证,快速响应时间达到了2 min以内,在一定侧摆角度下图像定位精度可以达到经度方向-50.36 m,纬度方向29.18 m。

GFDM-1 satellite adopts the ground-to-satellite integrated design method,which realizes onboard processing and rapid generation and delivery of intelligence information,reducing the response time to minute level.In this paper,the architecture of the ground-to-satellite integrated rapid response system of GFDM-1 satellite,based on the onboard processing system,data transmission and distribution system(data transmission subsystem)and ground receiving and processing system,is described in detail.Demonstration of radiometric correction,geometric correction and other ground-to-satellite integrated design methods and the analysis of the key indicators of on-orbit image positioning accuracy are carried out.Finally,key indicators such as rapid response time and image quality evaluation are verified through on-orbit tests of GFDM-1 satellite,showing the rapid response time can be less than 2 minutes,and image positioning accuracy can reach-50.36m in the longitude and 29.18m in the latitude direction.