Atmospheric Transmittance from 0.25 to 28.5 Um: Computer Code LOWTRAN 3
Optical Physics Laboratory, Air Force Cambridge Research Laboratories, 1975 - Atmospheric models - 109 pages
A FORTRAN computer program, LOWTRAN 3, is described for calculating the transmittance of the atmosphere in the spectral region from 0.25 to 28.5 micrometers at a spectral resolution of 20/cm. The program provides a choice of six atmospheric models covering seasonal and latitudinal variations from sea level to 100 km, two haze models, and accounts for molecular absorption, molecular scattering, and aerosol extinction. Refraction and earth curvature effects are also included. This program provides some modifications to the molecular absorption and aerosol extinction data provided in an earlier LOWTRAN 2 report. In addition, input modifications have been made, making the LOWTRAN 3 program considerably more flexible in terms of the input of meteorological data.
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absorption aerosol altitude assuming Atmospheric Transmittance BETA calculation CARD coefficient Comparison of LOWTRAN CONTINUE continuum correspond defined determine earth effect Equivalent absorber amount Example Figure FORMAT Fortran Code LOWTRAN frequency gases give given HAZE height HMIN IHAZE indicator initial input Integer ITYPE layer Listing of Fortran looking LOWTRAN LOWTRAN 3 Cont LOWTRAN 3 Predictions McClatchey measurements MICRONS MIDLATITUDE model atmosphere ozone parameter path Path Length POINT pressure PRINT tº problem quantities READ refractive index region relative humidity Report respectively sea level selects shows Slant Path ſº Space specified spectral SPHI standard subroutine SUMMER Table A1 temperature THET tº 9 trajectory TRAN transmittance calculation values visual range water vapor WAVELENGTH WINTER zenith angle