Articles | Volume 17, issue 15
https://doi.org/10.5194/amt-17-4613-2024
https://doi.org/10.5194/amt-17-4613-2024
Research article
 | 
09 Aug 2024
Research article |  | 09 Aug 2024

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

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Short summary
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.