天线方向图在轨测量是星载合成孔径雷达（SAR）定标技术的关键部分。本文对利用多个编码发射机在轨测
量星载 SAR接收天线二维方向图的技术进行了研究。结合 SAR系统的特点，论文对测量原理做了简要介绍，确定
了正交调制编码序列的选择，推导了信号生成、接收、多普勒补偿及相关处理的关键算法。计算机模拟测量结果验
证了该方法的可行性。

Inflight measurement of antenna pattern is a key technology of spaceborne SAR calibration. This paper describes a new method of antenna receive pattern measurement for spaceborne SAR using encoding transmitters. Considering the characters of SAR system, the principle is described briefly. The orthogonal modulation code is chosen and the arithmetic of signal generating, receiving, decoupling and processing is derived. The results of computer simulation prove that this measurement method is feasible.