8 January 2008 Retrieval of atmospheric water content and transmittance computation of thermal bands based on MODTRAN
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Abstract
As an EOS instrument with 36 bands, MODIS is very useful because of its global coverage, radiometric resolution and dynamic ranges as well as accurate calibration in multiple thermal infrared bands designed for retrievals of sea surface temperature (SST), land surface temperature (LST) and atmospheric properties. The paper discusses the influence of main parameters such as water content density on atmospheric transmittance and radiance. The relationships between the atmospheric transmittance and different atmospheric height, and different atmospheric water content were analyzed. This paper introduces and derives the algorithm about retrieving water content of atmosphere from MODIS data. The retrieving result was analyzed and then MODTRAN was employed to simulate the relationship between the water content of atmosphere and the transmittance of MODIS bands 31 and 32. The technique has great value to get some parameters timely with accuracy to every pixel and to monitor the global change.
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Qian Cheng, Xiuju Wu, "Retrieval of atmospheric water content and transmittance computation of thermal bands based on MODTRAN", Proc. SPIE 6835, Infrared Materials, Devices, and Applications, 68351C (8 January 2008); doi: 10.1117/12.754117; https://doi.org/10.1117/12.754117
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