中国自主研制的环境减灾小卫星星座中的雷达卫星(HJ-1C),频率设计在S波段,采用VV极化方式,入射角范围是25°—47°。根据HJ-1C的轨道参数和雷达传感器的系统参数,利用高精度的DEM数据(30m),结合地物分类数据(20m),综合考虑几何模型和辐射模型,模拟了该雷达卫星上的SAR图像。HJ-1C星SAR图像的模拟,使在该卫星发射前,能对数据产品有一个初步的认识,并可在雷达系统的设计和验证、图像的解译和新算法的测试等多个方面得到应用。

HJ-1C is a componentofHJ satelliteswhich are developed in China. HJ-1C SAR has a frequency\nofS-band, VV polarization, and incidence angle from 25°—47°. Based on configuration parameters ofHJ-1C\nand SAR sensor, mi age smi ulation was performed using high-resolution DEM(30m) and classification data\n(20m) in this paper, combining geometricaland radiometric charactersofSAR mi age. Thisworkwillgive us a\nprmi ary mi pression onHJ-1C products before the satellite being launched. Furthermore, the smi ulated mi age\nwillbenefit to the design and validation of sensor system, mi age interpretation and new algorithms test,etc.