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Proceedings Paper

A correlated-k based ultra-fast radiative transfer (kURT) method
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Paper Abstract

A new sensor-specific correlated-k (c-k) ultra-fast radiative transfer (RT) formalism, kURT, has been designed for fast broad-bandpass scene simulations from UV-visible to LWIR wavelengths. A higher resolution RT code (1 cm-1 MODTRAN) has been adapted to output 1 cm-1 correlated-k parameters for ozone, water, and the combined uniformly mixed species on a pressure-temperature grid, which are merged to form a compact c-k set incorporating the sensor bandpass response function. The compact set is used to compute bandpass transmittance and radiance in near-real time. Scattering parameters (molecular Rayleigh, clouds and aerosols), blackbody and solar functions are cast as compact k-dependent source terms and used in the radiance computations. Preliminary transmittance results for 3-5 and 8-12 micron bandpasses and visible-MWIR sensors yield results within 2% of a 1 cm-1 MODTRAN calculation with a two-orders-of-magnitude computational savings. Applications include near-earth broadband propagation and extinction calculations for target detection and recognition, mid-range tracking, and search and rescue operations from ground and low altitude aircraft.

Paper Details

Date Published: 18 October 2005
PDF: 9 pages
Proc. SPIE 5982, Image and Signal Processing for Remote Sensing XI, 598217 (18 October 2005); doi: 10.1117/12.627715
Show Author Affiliations
Prabhat K. Acharya, Spectral Sciences, Inc. (United States)
Raphael Panfili, Spectral Sciences, Inc. (United States)
Alexander Berk, Spectral Sciences, Inc. (United States)
Steve M. Adler-Golden, Spectral Sciences, Inc. (United States)
Marsha Fox, Spectral Sciences, Inc. (United States)
Alan Wetmore, Army Research Lab. (United States)
Irwin E. Alber, Boeing Space and Intelligence Systems (United States)


Published in SPIE Proceedings Vol. 5982:
Image and Signal Processing for Remote Sensing XI
Lorenzo Bruzzone, Editor(s)

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