A new non-linearity correction method for the spectrum from the Geostationary Inferometric Infrared Sounder on board Fengyun-4 satellites and its preliminary assessments
Qiang Guo,Yuning Liu,Xin Wang,and Wen Hui
Qiang Guo
Chinese Academy of Meteorological Science, Beijing 100081, China
National Satellite Meteorological Center (National Center for Space Weather), Beijing 100081, China
Innovation Center for FengYun Meteorological Satellite (FYSIC), Beijing 100081, China
Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, China Meteorological Administration, Beijing 100081, China
Yuning Liu
Chinese Academy of Meteorological Science, Beijing 100081, China
Non-linearity (NL) correction is a critical procedure to guarantee that the calibration accuracy of a spaceborne sensor approaches a reasonable level. Different from the classical method, a new NL correction method for a spaceborne Fourier transform spectrometer is proposed. To overcome the inaccurate linear coefficient from two-point calibration influencing NL correction, an iteration algorithm is established that is suitable for NL correction of both infrared and microwave sensors.
Non-linearity (NL) correction is a critical procedure to guarantee that the calibration accuracy...
