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Title Algorithm for the calculation of absorption coefficient-pressure broadened molecular transitions / Shepherd A. Clough, Francis X. Kneizys, James H. Chetwynd, Jr.
Imprint Hanscom AFB, Mass. : Air Force Geophysics Laboratory, Air Force Systems Command, United States Air Force, 1977.

Copies/Volumes

LOCATION CALL # STATUS
 GovDocs Federal  D 301.45/39:607    AVAILABLE
Description 64 p. : ill. ; 28 cm.
Series Environmental Research Papers ; No. 607.
AFGL TR ; 77-164.
U.S. Air Force Geophysics Laboratory. AFGL TR ; 77-164.
Note "22 July 1976."
ADA047515 (from http://www.dtic.mil).
Optical Physics Division Project 2310.
Research supported by the Air Force Geophysics Laboratory, Air Force Systems Command, United States Air Force, Hanscom AFB, Massachusetts.
Bibliog. Includes bibliographical references (p. 35-36).
Subject Algorithms -- Computer programs.
Mass attenuation coefficients -- Computer programs.
Spectrum analysis.
Absorption spectra.
Summary This report describes an algorithm for the accelerated computation of the convolution of a Lorentz line shape (pressure broadened) with spectral line data. A computational savings of approximately 10 has been achieved over conventional methods. The Lorentz function has been decomposed into three functions, each of which is convolved independently at optional sampling intervals. Criteria for the determination of the sampling interval of the Lorentz function for a resultant error of 0.1 percent is described. The report contains a listing of the computer program based on the algorithm and sample results in the spectral region 3550 to 3650/cm due to water and carbon dioxide.
Other Author Kneizys, F. X.
Chetwynd, James H.
U.S. Air Force Geophysics Laboratory.