干涉图零光程差位置的确定方法
Received:September 09, 2017  Revised:October 20, 2017  点此下载全文
引用本文:冯绚,郭强,韩昌佩,邹曜璞.干涉图零光程差位置的确定方法[J].Journal of Infrared and Millimeter Waves,2017,36(6):795~798
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Author NameAffiliationE-mail
FENG Xuan National Satellite Meteorological Center fengxuan@cma.gov.cn 
GUO Qiang National Satellite Meteorological Center guoqiang@cma.gov.cn 
HAN Chang-Pei Shanghai Institute of Technical Physics,Chinese Academy of Sciences  
ZOU Yao-Pu Shanghai Institute of Technical Physics,Chinese Academy of Sciences  
基金项目:中国科学院通用光学定标与表征技术重点实验室开放研究基金;
中文摘要: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、条件计数错误等影响,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。
中文关键词:风云四号A星  干涉式大气垂直探测仪  干涉图  零光程差
 
Correction method of zero path difference position
Abstract: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 abstained the better results.
keywords:FY-4A,GIIRS,interferogram,ZPD
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