Software has been developed for an improved method of correcting for the atmospheric optical effects (primarily, effects of aerosols and water vapor) in spectral images of the surface of the Earth acquired by airborne and spaceborne remote-sensing instruments. In this method, the variables needed for the corrections are extracted from the readings of a radiometer located on the ground in the vicinity of the scene of interest. The software includes algorithms that analyze measurement data acquired from a shadow-band radiometer. These algorithms are based on a prior radiation transport software model, called MODTRAN™, that has been developed through several versions up to what are now known as MODTRAN4™ and MODTRAN5™. These components have been integrated with a user-friendly Interactive Data Language (IDL) front end and an advanced version of MODTRAN4™. Software tools for handling general data formats, performing a Langley type calibration, and generating an output file of retrieved atmospheric parameters for use in another atmospheric- correction computer program known as "FLAASH" have also been incorporated into the present software. Concomitantly with the software described thus far, there has been developed a version of FLAASH that utilizes the retrieved atmospheric parameters to process spectral image data.

These programs were written by Steven M. Adler-Golden, Peter Rochford, Michael Matthew, and Alexander Berk of Spectral Sciences, Inc. for Stennis Space Center.

Inquiries concerning rights for the commercial use of this invention should be addressed to:

Spectral Sciences, Inc.
4 Fourth Ave.
Burlington, MA 01803
Phone No.: (781) 273-4770

Refer to SSC-00226, volume and number of this NASA Tech Briefs issue, and the page number.

NASA Tech Briefs Magazine

This article first appeared in the March, 2007 issue of NASA Tech Briefs Magazine.

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