一种星载SAR定标接收机误差分析

Error analysis of a scaling receiver for spaceborne SAR

作为星载SAR地面微波辐射定标场主要外定标设备,定标接收机用于完成星载SAR天线方向图和辐射功率的测量。为实现高精度测量,需要定标接收机有很高的测量精度。本文对定标接收机的高精度指标进行了定量误差分析,介绍了定标接收机的工作原理,给出了误差计算模型和误差分析方法。该方法利用误差精度分配及误差计算最大值来分析定标接收机的精度指标,并给出了定标接收机各项精度指标的实测结果,验证了该误差分析方法的正确性和精确性。

As the main outer scaling equipment on the ground microwave radiation scaling field for the spaceborne SAR, the scaling receiver is used to measure the directional pattern and the radiant power of the spaceborne SAR antenna. In order to realize the high-precision measurement, it is re- quired that the scaling receiver should have very high measuring precision. The quantitative error a- nalysis is made on the high-precision indexes of the scaling receiver, the principle of the scaling re- ceiver is introduced, and the error calculation model and the error analysis method are proposed. The precision indexes of the scaling receiver are analyzed through the error accuracy distribution and the maximum value of the error calculation. The test results of each precision index of the scaling re- ceiver are given, verifying the correctness and accuracy of the error analysis method.