风云三号D星红外高光谱大气探测仪零光程差检测  

Detection of zero path difference position for FY-3D hyper-spectral infrared atmospheric sounder

作　　者：邵春沅 顾明剑[1] 漆成莉[2] 吴春强[2] SHAO Chun-yuan;GU Ming-jian;QI Chen-li;WU Chun-qiang(Key Laboratory of Infrared Imaging and Detection,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;Key Laboratory of Radiometric Calibration and Validation for Environmental Satellite,China,China Mateorological Administration,National Satellite Meteorological Center,Beijing 100081,China)

机构地区：[1]中国科学院上海技术物理研究所中国科学院红外探测与成像重点实验室,上海200083 [2]国家卫星气象中心中国遥感卫星辐射测量和定标重点开放实验室,北京100081

出　　处：《光学精密工程》2020年第12期2573-2580,共8页Optics and Precision Engineering

基　　金：国家重点研发计划资助项目(No.2018YFB0504800,No.2018YFB0504802)。

摘　　要：红外高光谱大气探测仪是我国第二代极轨气象卫星风云三号D星搭载的大气探测仪器。干涉图零光程差位置的确定是干涉图叠加和傅里叶变换的前提,在实际应用中由于仪器自身和环境因素的影响使其确定困难。本文根据红外高光谱大气探测仪的在轨实测数据,分析了零光程差偏差对数据反演的影响,分别以最大相关法和定标光谱虚部最小法,检测干涉图的零光程差位置。干涉图校准后黑体和冷空光谱的相位差在π附近。定标光谱虚部在0附近,仅表征噪声。该方法能够很好地用于风云三号D星红外高光谱大气探测仪的数据预处理。The Hyper-spectral Infrared Atmospheric Sounder(HIRAS)is a new vertical temperature and humidity detection instrument carried by China’s second-generation polar orbiting meteorological satellite FY-3D.The determination of the zero optical path difference(ZPD)position of interferograms is the premise of interferogram overlays.However,in practical applications,it is difficult to determine this position because of the influence of the instruments involved and their environments.In this study,based on measured on-orbit HIRAS data,the influence of ZPD position deviation on data inversion is analyzed.The maximum correlation method and the minimum imaginary part method of complex spectra are used to detect the ZPD position.After the correction,the phase difference between the inner blackbody and deep space is approximatelyπ.The imaginary part of the calibrated spectra is nearly equal to 0,which only represents noise.This method can be well used for HIRAS data preprocessing.

关 键 词：傅里叶光谱仪 复数定标 零光程差 虚部 

分 类 号：TP732.2[自动化与计算机技术—检测技术与自动化装置]