A software package generates simulated hyperspectral imagery for use in validating algorithms that generate estimates of Earth- surface spectral reflectance from hyperspectral images acquired by airborne and spaceborne instruments.

This software is based on a direct simulation Monte Carlo approach for modeling three- dimensional atmospheric radiative transport, as well as reflections from surfaces characterized by spatially inhomogeneous bidirectional reflectance distribution functions. In this approach, “ground truth” is accurately known through input specification of surface and atmospheric properties, and it is practical to consider wide variations of these properties. The software can treat both land and ocean surfaces, as well as the effects of finite clouds with surface shadowing. The spectral/ spatial data cubes computed by use of this software can serve both as a substitute for, and a supplement to, field validation data.

This program was written by Steven C. Richtsmeier, Alexander Singer-Berk, and Lawrence S. Bernstein of Spectral Sciences, Inc., for Stennis Space Center.

Inquiries concerning rights for the commercial use of this invention should be addressed to the Intellectual Property Manager, Stennis Space Center, (228) 688-1929. Refer to SSC- 00183.

NASA Tech Briefs Magazine

This article first appeared in the April, 2004 issue of NASA Tech Briefs Magazine.

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