Impact of multiple scattering on simulated infrared cloud scene images

Jerry Alan Tessendorf; David Wasson

doi:10.1117/12.177937

15 June 1994 Impact of multiple scattering on simulated infrared cloud scene images

Jerry Alan Tessendorf, David Wasson

Proceedings Volume 2223, Characterization and Propagation of Sources and Backgrounds; (1994) https://doi.org/10.1117/12.177937
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

Abstract

The 3D volumetric character of clouds is a critically important factor in determining cloud structure as seen in infrared imagery. Using a longwave cloud scene simulator which images a 3D cloud volume, the 3D structure has been shown to be particularly important when viewing at low grazing angles. In order to conduct analyses of cloud scene structure in MW and visible bands as well, the longwave simulator has been significantly upgraded to perform imaging of clouds with multiple scattering included. The multiple scattering algorithm is based on a WKB approximation method for the exact radiative transfer problem, and comprehends the spatial variations in optical properties within the cloud volume. As a first analysis, we have generated a cloud scene which is backlit by the sun, and systematically assess the contributions of the thermal, solar, and multiple scattering mechanisms within the imagery. As might be expected, multiple scattering has its greatest impact at the cloud edges in the MW band, where the `silver lining' is formed.

Citation Download Citation

Jerry Alan Tessendorf and David Wasson "Impact of multiple scattering on simulated infrared cloud scene images", Proc. SPIE 2223, Characterization and Propagation of Sources and Backgrounds, (15 June 1994); https://doi.org/10.1117/12.177937

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