Evaluation of nonlinear calibration on the satellite TIR image applications

Feng Lu; Xiaohu Zhang; Xiao Wu; Peng Cui; Na Xu

doi:10.1117/12.2069038

19 November 2014 Evaluation of nonlinear calibration on the satellite TIR image applications

Feng Lu, Xiaohu Zhang, Xiao Wu, Peng Cui, Na Xu

Proceedings Volume 9264, Earth Observing Missions and Sensors: Development, Implementation, and Characterization III; 926413 (2014) https://doi.org/10.1117/12.2069038
Event: SPIE Asia-Pacific Remote Sensing, 2014, Beijing, China

Abstract

Using Global Space-based Inter-Calibration System (GSICS), the thermal infrared (TIR) channel was calibrated with high precision. During this procedure, a new calibration table was made, and the sensor non-linear effect was corrected. During the TIR channel image remapping and Level2 (L2) dataset generation procedure, the bilinear interpolation was widely used. Most of the L2 data was stored in D/N count with corresponding calibration table, which assumes D/N count is linear. But in the real world, the non-linear D/N count which comes from imprecise modeled A/D transformation of instrument sensor, will lead to the temperature bias on L2 dataset, even though the high precision calibration Look up Table (LUT) was regenerated. In this paper, D/N bias comes from the mapping process was diagnosed, with the consideration of the temperature difference between neighbor pixels.

Citation Download Citation

Feng Lu, Xiaohu Zhang, Xiao Wu, Peng Cui, and Na Xu "Evaluation of nonlinear calibration on the satellite TIR image applications", Proc. SPIE 9264, Earth Observing Missions and Sensors: Development, Implementation, and Characterization III, 926413 (19 November 2014); https://doi.org/10.1117/12.2069038

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