Fast simulation tool for ultraviolet radiation at the earth's surface

Ola Engelsen; Arve Kylling

doi:10.1117/1.1885472

1 April 2005 Fast simulation tool for ultraviolet radiation at the earth's surface

Ola Engelsen, Arve Kylling

Author Affiliations +

Optical Engineering, Vol. 44, Issue 4, 041012 (April 2005). https://doi.org/10.1117/1.1885472

Abstract

FastRT is a fast, yet accurate, UV simulation tool that computes downward surface UV doses, UV indices, and irradiances in the spectral range 290 to 400 nm with a resolution as small as 0.05 nm. It computes a full UV spectrum within a few milliseconds on a standard PC, and enables the user to convolve the spectrum with user-defined and built-in spectral response functions including the International Commission on Illumination (CIE) erythemal response function used for UV index calculations. The program accounts for the main radiative input parameters, i.e., instrumental characteristics, solar zenith angle, ozone column, aerosol loading, clouds, surface albedo, and surface altitude. FastRT is based on look-up tables of carefully selected entries of atmospheric transmittances and spherical albedos, and exploits the smoothness of these quantities with respect to atmospheric, surface, geometrical, and spectral parameters. An interactive site, http://nadir.nilu.no/~olaeng/fastrt/fastrt.html, enables the public to run the FastRT program with most input options. This page also contains updated information about FastRT and links to freely downloadable source codes and binaries.

©(2005) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Ola Engelsen and Arve Kylling "Fast simulation tool for ultraviolet radiation at the earth's surface," Optical Engineering 44(4), 041012 (1 April 2005). https://doi.org/10.1117/1.1885472

Published: 1 April 2005

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