星载分布式InSAR目标定位模型研究

Research on Target Positioning Model for the Spaceborne Distributed InSAR

针对星载二号分布式干涉合成孔径雷达系统目标定位的问题,以双基成像模型为基础,推导了雷达发射信号时刻与接收回波时刻卫星平台位置及速度发生变化的三维目标定位方程,给出了解算过程中的数据处理策略。文中采用星载分布InSAR干涉影像进行的无控制点条件下的定位和精度检测实验,验证了模型和数据处理策略的有效性和准确性。

Basing on the bistatic imaging model and the situation where the position and velocity of the satellite platform had changed at the time of the radar transmitting signal and the time of receiving echo,the three-dimensional target positioning equation is derived to solve the problem of spaceborne distributed interferometric synthetic aperture radar system target positioning and the data processing strategy is given during the solution.The interference images are used to perform positioning experiments and accuracy detection without ground control points,and the effectiveness and accuracy of target positioning model and data processing strategies are verified through the experimental results.