27 August 2008 Method for retrieving column water vapor at night using mid-wave infrared bands
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Abstract
The novel mid-wave infrared (MWIR) retrieval method described in this paper is based on an idea derived from retrieving accurate sea surface temperatures for the Multispectral Thermal Imager (MTI) which uses the "Same Temperature Criterion", i.e., that retrieved skin temperatures in all bands must be the same. We apply it to simulated MODIS datasets. In this paper we present retrieval errors for this method for a range of atmospheric conditions and skin surface variations. The STC retrieval method is applied to actual, de-striped MODIS data, and we show that it is capable of retrieving subtle high spatial resolution (1 km) water vapor variations over ocean surfaces. The variance of the retrieved surface temperature is a useful criterion for finding sub-pixel area hotspots (e.g. forest fires, lava flows, gas flares, furnaces, boilers, etc) and distinguish them from warm water bodies at night.
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Christoph C. Borel, Christoph C. Borel, Michael Abel, Michael Abel, } "Method for retrieving column water vapor at night using mid-wave infrared bands", Proc. SPIE 7086, Imaging Spectrometry XIII, 70860G (27 August 2008); doi: 10.1117/12.794945; https://doi.org/10.1117/12.794945
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