星载SAR工作模式反演方法研究

随着星载合成孔径雷达(SAR)在军事及民用领域的广泛应用,对于星载SAR的对抗也变得越来越重要。在对其截获信号及工作模式进行具体分析的基础上,给出星载SAR空间几何模型,构建并划分瞄准点或视角搜索域,计算搜索域对应的理论接收功率数组,得出其与地面接收站实际接收功率数组的误差平方和,搜索其最小值并进行迭代计算,从而比较精确地反演出星载SAR的观测模式及观测范围。计算机仿真结果证明了算法的正确性和有效性。

Research on Operation Inversion Method of Spaceborne SAR

With the wide application of spaceborne synthetic aperture radar （SAR） in military and civilian fields, the countermeasure to spaceborne SAR became increasingly important. On the basis of the analysis of radar sitnal and operating mode,the geometric space model of spaceborne SAR is given, the search domain of viewing center coordinates or viewing angle is built and divided, and the theoretical received power array corresponding to the search domain is calculated in this paper. Furthermore, the sum of power deviation squares between theoretical data and actual data is calculated. After the minimum value searching and iteration, the observation area and operation mode could be calculated more accurately. Simulation results prove the correctness and effectiveness of the algorithm.