星载雷达高度计有源定标器回波模型及性能仿真研究

A Simulation Study on Waveform Model and Performance Evaluation for an Altimeter Transponder System

为了对HY-2卫星雷达高度计进行定标,中国科学院空间科学与应用研究中心微波遥感重点实验室研制了3台有源定标器,并设计了利用有源定标器对高度计进行高度和散射系数定标的方案和算法。基于HY-2高度计和有源定标器的系统参数和定标方案,对高度计接收到的有源定标器回波波形和轨迹进行了仿真,研究了从中提取测量参数的方法,并对测量精度进行了分析。同时验证了3台有源定标器同时工作及其布设方案的可行性。

For the in-orbit calibration of HY-2 Satellite Radar Altimeter（ALT）,three active transponders were developed by Mirslab,CSSAR,CAS,and the schemes and algorithms are designed for fulfilling the calibration requirements.Based on the system design and calibration rationales of HY-2 ALT and the transponders,the echo waveforms and trajectory＇s presented in the altimeter range window were simulated,and the calibration performance were also evaluated.Besides,the waveform features with multiple transponders are simulated to optimize their deployments.