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Proceedings Paper

Nonlinear bias analysis and correction of microwave temperature sounder observations for FY-3C meteorological satellite
Author(s): Taiyang Hu; Rongchuan Lv; Xu Jin; Hao Li; Wenxin Chen
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Paper 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.

Paper Details

Date Published: 12 January 2018
PDF: 8 pages
Proc. SPIE 10623, 2017 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications, 106230C (12 January 2018); doi: 10.1117/12.2293296
Show Author Affiliations
Taiyang Hu, China Academy of Space Technology (China)
Rongchuan Lv, China Academy of Space Technology (China)
Xu Jin, China Academy of Space Technology (China)
Hao Li, China Academy of Space Technology (China)
Wenxin Chen, China Academy of Space Technology (China)


Published in SPIE Proceedings Vol. 10623:
2017 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications
Cunlin Zhang; Xi-Cheng Zhang; Zhiming Huang; Liquan Dong, Editor(s)

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