干涉图零光程差位置的确定方法

风云四号A星干涉式大气垂直探测仪在轨运行以来发现,受噪声、采样误差、条纹计数错误等影响,干涉图零光程点会发生定位偏差.干涉条纹平移引起的相位误差与波数成线性关系,对残余相位进行线性回归分析可以得到零光程差位置的偏移量.利用在轨实测数据,应用残余相位方法,分析了零光程点定位偏差校正前后对相位谱及辐射光谱的影响.该方法已经应用于风云四号A星干涉式大气垂直探测仪的在轨数据预处理中,并取得了很好的应用效果....

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Bibliographic Details
Published in红外与毫米波学报 Vol. 36; no. 6; pp. 795 - 798
Main Author 冯绚;郭强;韩昌佩;邹曜璞
Format Journal Article
LanguageChinese
Published 国家卫星气象中心,北京,100081%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 2017
Subjects
干涉图
干涉式大气垂直探测仪
零光程差
风云四号A星
FY-4A
geostationary interferometric infrared sounder (GIIRS)
interferogram
干涉图
零光程差
zero path difference (ZPD)
风云四号A星
干涉式大气垂直探测仪
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ISSN1001-9014
DOI10.11972/j.issn.1001-9014.2017.06.026

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Summary:风云四号A星干涉式大气垂直探测仪在轨运行以来发现,受噪声、采样误差、条纹计数错误等影响,干涉图零光程点会发生定位偏差.干涉条纹平移引起的相位误差与波数成线性关系,对残余相位进行线性回归分析可以得到零光程差位置的偏移量.利用在轨实测数据,应用残余相位方法,分析了零光程点定位偏差校正前后对相位谱及辐射光谱的影响.该方法已经应用于风云四号A星干涉式大气垂直探测仪的在轨数据预处理中,并取得了很好的应用效果.
Bibliography:The Geostationary Interferometric Infrared Sounder（ GIIRS） on board FY-4A is a Michelson interferometer infrared sounder. The interferogram is sampled at discrete points. The zero path difference（ ZPD）,which is the peak of the interferogram,is not sampled. This effectively shifts the interferogram and adds a linear phase to the spectrum. A linear regression on the residual phase of the calibrated spectrum will reveal the shift. This method has been used in the interferogram signal processing of the GIIRS,and has obtained a better results.
FY-4A, geostationary interferometric infrared sounder （GIIRS）, interferogram, zero path difference （ZPD）
31-1577/TN
FENG Xuan1, GUO Qiang1 , HAN Chang-Pei2, ZOU Yao-Pu2 （1. National Satellite Meteorological Center, Beijingl00081, China; 2. Key Laboratory of Infrared System Detection and Imaging Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China）
ISSN:1001-9014
DOI:10.11972/j.issn.1001-9014.2017.06.026