Nonlinear bias analysis and correction of microwave temperature sounder observations for FY-3C meteorological satellite

Taiyang Hu; Rongchuan Lv; Xu Jin; Hao Li; Wenxin Chen

doi:10.1117/12.2293296

12 January 2018 Nonlinear bias analysis and correction of microwave temperature sounder observations for FY-3C meteorological satellite

Taiyang Hu, Rongchuan Lv, Xu Jin, Hao Li, Wenxin Chen

Author Affiliations +

Proceedings Volume 10623, 2017 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications; 106230C (2018) https://doi.org/10.1117/12.2293296
Event: International Conference on Optical Instruments and Technology 2017, 2017, Beijing, China

Abstract

The nonlinear bias analysis and correction of receiving channels in Chinese FY-3C meteorological satellite Microwave Temperature Sounder (MWTS) is a key technology of data assimilation for satellite radiance data. The thermal-vacuum chamber calibration data acquired from the MWTS can be analyzed to evaluate the instrument performance, including radiometric temperature sensitivity, channel nonlinearity and calibration accuracy. Especially, the nonlinearity parameters due to imperfect square-law detectors will be calculated from calibration data and further used to correct the nonlinear bias contributions of microwave receiving channels. Based upon the operational principles and thermalvacuum chamber calibration procedures of MWTS, this paper mainly focuses on the nonlinear bias analysis and correction methods for improving the calibration accuracy of the important instrument onboard FY-3C meteorological satellite, from the perspective of theoretical and experimental studies. Furthermore, a series of original results are presented to demonstrate the feasibility and significance of the methods.

Citation Download Citation

Taiyang Hu, Rongchuan Lv, Xu Jin, Hao Li, and Wenxin Chen "Nonlinear bias analysis and correction of microwave temperature sounder observations for FY-3C meteorological satellite", Proc. SPIE 10623, 2017 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications, 106230C (12 January 2018); https://doi.org/10.1117/12.2293296

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