Accession Number : ADA137689


Title :   Atmospheric Transmittance/Radiance: Computer Code LOWTRAN 6. Supplement: Program Listings


Descriptive Note : Environmental research papers


Corporate Author : AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA


Personal Author(s) : Kneizys, F. X. ; Shettle, E. P. ; Gallery, W. O. ; Chetwynd, J. H., Jr. ; Abreu, L. W.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA137689


Report Date : 01 AUG 1983


Pagination or Media Count : 197


Abstract : This supplement lists the LOWTRAN 6 computer code for predicting atmospheric transmittance and the thermal radiation emitted by the atmosphere and earth from 350 to 40,000 per cm at a spectral resolution of 20 per cm. The program is based on the LOWTRAN 5 (1980) computer code. Solar/lunar scattered radiation has ben added to the code, as well as a new spherical refractive geometry subroutine and an improved water vapor continuum model. Other modifications to the code include a wind-dependent maritime aerosol model, a vertical structure aerosol model, a cirrus cloud model, and a rain model. The computer code contains representative (geographical and seasonal) atmospheric models and representative aerosol models with an option to replace them with user-derived or measured values. The program can be run in one of three modes, namely, to compute only atmospheric transmittance, to compute atmospheric transmittance and radiance, or to compute atmospheric transmittance, atmospheric radiance, and scattered solar/lunar background radiance for a given slant path geometry. Two new programs now available with the LOWTRAN 6 package, the plot program and the filter function program, are listed in this supplement.


Descriptors :   *SUBROUTINES , *MACHINE CODING , *ATMOSPHERE MODELS , USER MANUALS , THERMAL RADIATION , ATMOSPHERIC PHYSICS , PREDICTIONS , TRANSMITTANCE , FORTRAN.


Subject Categories : ATMOSPHERIC PHYSICS
      COMPUTER PROGRAMMING AND SOFTWARE


Distribution Statement : APPROVED FOR PUBLIC RELEASE