一种新的星载双站SAR斜视等效距离模型

A new effective squint range model of Spaceborne bistatic SAR

针对星载双站合成孔径雷达,提出单直线斜视等效距离模型,并给出适用的充分条件,与二阶距离模型、双直线同速等效距离模型、双直线双速等效距离模型进行理论和仿真分析比较,表明单直线斜视等效距离模型是一种精确、有效、简洁的距离模型.由于该模型具有单站SAR距离模型的形式,因此可以采用单站SAR成像方法来进行双站SAR成像处理,最后基于该模型,通过高精度斜视CS算法进行双站SAR成像仿真验证.

As to spacebome bistatic SAR, a new single-line effective squint range model is presented. Its sufficient condition is given,too. It is compared with three other range models which are second-order model, double-line equal velocity model and double- line double velocity model. The result of comparison in theory and simulation show that the single-line range model is an accurate, valid and simple range model. Because the model have the same form as the monostatic SAR, it can be applied to bistatic SAR imaging processing by monostatic SAR imaging methods. Lastly, the chirp scaling algorithm is used to bistatic SAR imaging based on this model.