Modeling and analysis for infrared clutter radiance of atmospheric absorption band sensor

Yiming Cao; Wei Zhang; Mingyu Cong; Wenzhuo Bao; Xianglong Meng; Jun Cheng

doi:10.1117/12.835984

5 August 2009 Modeling and analysis for infrared clutter radiance of atmospheric absorption band sensor

Yiming Cao, Wei Zhang, Mingyu Cong, Wenzhuo Bao, Xianglong Meng, Jun Cheng

Proceedings Volume 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications; 73832K (2009) https://doi.org/10.1117/12.835984
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

An extended analytic model for atmospheric clutter radiance in absorption bands is developed. In this model, clutter radiance is mainly due to temperature and reflectance fluctuations of atmospheric, cloud and earth. A simplified line-of-sight (LOS) radiance model for short-wave infrared (SWIR) and mid-wave infrared (MWIR) absorption bands is introduced, based on the one-dimensional radiation transfer equation (RTE) and Young's semi-empirical model for diffuse reflectance of clouds. Under the assumption that atmospheric temperature fluctuations are isotropic horizontally, the relations between clutter radiance and temperature fluctuations as well as other factors are obtained. The clutter radiance characteristics are analyzed in 2.7μm and 4.3μm absorption bands, the long wavelength wing of 2.85μm and 4.35μm shows a much larger clutter contribution from earth and cloud. The models present here are efficient and reasonable by comparing the results of MODTRAN and data from SPIRIT-III radiometer.

Citation Download Citation

Yiming Cao, Wei Zhang, Mingyu Cong, Wenzhuo Bao, Xianglong Meng, and Jun Cheng "Modeling and analysis for infrared clutter radiance of atmospheric absorption band sensor", Proc. SPIE 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, 73832K (5 August 2009); https://doi.org/10.1117/12.835984

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