SHAO Chun-yuan,GU Ming-jian,QI Chen-li,et al.Detection of zero path difference position for FY-3D hyper-spectral infrared atmospheric sounder[J].Optics and Precision Engineering,2020,28(12):2573-2580.
SHAO Chun-yuan,GU Ming-jian,QI Chen-li,et al.Detection of zero path difference position for FY-3D hyper-spectral infrared atmospheric sounder[J].Optics and Precision Engineering,2020,28(12):2573-2580. DOI: 10.37188/OPE.20202812.2573.
Detection of zero path difference position for FY-3D hyper-spectral infrared atmospheric sounder
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 approximately π. 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.
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Improvement of phase correction for FY-3D hyper-spectral infrared atmospheric sounder
Improvement of phase correction for FY-3D hyper-spectral infrared atmospheric sounder
Related Author
ZUO Fenghua
HU Xiuqing
WANG Xia
QI Chengli
LI Lu
Related Institution
School of Optics and Photonics, Beijing Institute of Technology
Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, National Satellite Meteorological Center (National Center for Space Weather), China Meteorological Administration
Innovation Center for FengYun Meteorological Satellite (FYSIC)