环境-1A超光谱成像仪相对辐射定标方法应用研究

介绍了环境-1A卫星上装载的新型有效载荷超光谱成像仪的工作原理。指出我国使用超光谱干涉仪尚处于试验阶段,对在轨数据处理方法还需要完善。文章针对干涉仪的数据立方体特性提出一种空间维的基于统计方法的在轨干涉数据相对辐射定标处理方法,并通过对卫星实际在轨数据的对比处理来验证其处理效果。结果表明,相对辐射定标处理可以修正CCD响应的不均匀性和入射光场的不均匀性,减小非线性相位偏移,提高复原光谱的精度。

Study on On-orbit Data Relative Radiometric Calibration of Hyper-spectral Imager on HJ-IA Satellite

This paper introduces the principle of hyperspectral imager,a new payload of the HJ-1A satellite.On-board data process of hyperspectral imager is imperfect because China has just started to use it.A method of relative radiometric calibration using on-orbit interferometer data is introduced,which is based on statistics method.Use the real on orbit data of satellite to validate it.The results indicate that the method can correct the non-uniformity of CCD response,correct the non-uniformity of the imported lig...