大气环境红外甚高光谱分辨率探测仪数字建模与仿真  

Digital Modeling and Simulation of AIUS

作　　者：江澄[1,2] 陶东兴 何红艳 JIANG Cheng;TAO Dongxing;HE Hongyan(Beijing Institute of Space Mechanics ＆ Electricity, Beijing 100094, China;Beijing Key Laboratory of Advanced Optical Remote Sensing Technology, Beijing 100094, China;Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China)

机构地区：[1]北京空间机电研究所,北京100094 [2]先进光学遥感技术北京市重点实验室,北京100094 [3]北京卫星环境工程研究所,北京100094

出　　处：《航天返回与遥感》2018年第3期94-103,共10页Spacecraft Recovery & Remote Sensing

基　　金：国家高分重大专项应用共性项目(No.50-Y20A38-0509-15/16)

摘　　要："高分五号"卫星是中国高分专项工程中的唯一一颗实现高光谱分辨率的遥感卫星,其中搭载的大气环境红外甚高光谱分辨率探测仪(Atmospheric Infrared Ultra-spectral Sounder,AIUS)是中国第一个星载超高光谱掩星探测载荷,是中国目前光谱分辨率最高的星载傅里叶变换光谱仪。文章基于AIUS的探测原理,以掩星观测路径的能量传输为线索,研究探测仪数据获取链路中各个环节的辐射传输过程,建立了包括大气红外辐射传输仿真和探测器仿真的数字化建模与仿真模型,并对仿真模型进行了精度验证,充分验证了数字仿真模型的有效性和准确性。验证试验结果表明:数字仿真模型具有高精度的数据仿真能力,所有通道仿真数据与实际测量数据相比,相对误差小于2%,数据相似度优于0.99。因此,数字仿真模型能够为"高分五号"卫星大气环境红外甚高光谱分辨率探测仪在轨成像质量预测、指标参数优化和应用能力评价提供重要的数据支撑。GF-5 is a Hyperspectral remote sensing satellite in the GF series of satellites. The key payload, the Atmospheric Infrared Ultra-spectral Sounder（AIUS）, is the first spaceborne occultation sensor with ultra-spectral resolution, as well as the spaceborne fourier transform spectrometer with finest spectral resolution. A digital simulation model is established based on the sounding theory of AIUS. This paper takes the energy transmission of the occultation path as a clue and then simulates the radiative transfer process of each link in chain approach of AIUS. Then an experiment for accuracy evaluation is accomplished by applying the digital simulation model to an in-situ measurement. Experimental results indicate that the overall relative error is below 2% and the similarity is better than 0.99, which prove that the digital model can simulate the AIUS data with good accuracy and perfect performance in subsequent application.

关 键 词：掩星测量 傅里叶变换光谱仪 建模与仿真 高光谱 “高分五号”卫星 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]