THE ROTATION VIBRATION ANALYSIS OF THE ν1\nu_{1} AND ν3\nu_{3} BANDS OF OZONE IN THE 9-MICRON REGION

$^{1}$S.A. Clough, Symposium on Molecular Structure and Spectroscopy, The Ohio State University, Columbus, Ohio, June 11-15-1962, Paper K4.Author Institution: Block Associates; AFCRALA computational procedure previously $described^{1}$ has been utilized in the determination of constants for the $\nu_{1}$ and $\nu_{3}$ bands of ozone. Four hundred lines have been fitted by the method of least squares to each band and an absorption contour has been calculated which is in excellent agreement with the observed spectrum in this region between 8.7 and 10.0 microns. The transition frequencies and intensities up to J=50 have been calculated by diagonalizing the asymmetric rotor Hamiltonian with distortion included. Final constants for both bands will be presented

THE REFRACTIVE INDEX OF OZONE IN THE VISIBLE AND NEAR INFRARED SPECTRAL REGIONS

$^{1}$P. W. Langhoff and M. Karplus, J. Opt. Soc. Am. 59, 863 (1969).""Author Institution: Air Force Cambridge Research LaboratoriesAn asymmetric Michelson interferometer has been constructed in order to measure the refractive index of ozone. Optical dispersion measurements have been carried out between 3800 {\AA} and 2.5 microns with an absolute accuracy of one part in $10^{6}$. The results have been interpreted with a two term Sellmeier equation as well as the more recent procedure proposed by Langhoff and $Karplus.^{1}$ The extrapolation of the data to long wavelengths has been used to examine dielectric constant values reported in the literature

A MOLECULAR LINE SHAPE FORMULATION: APPLICATION TO ATMOSPHERIC CONTINUUM

Author Institution: Air Force Geophysics Laboratory (OPI), Hanscom AFB; GTE Laboratories, Inc., Waltham; Dept. of Physics, University of AlabamaA spectral line shape formulation will be developed in the context of the dipole autocorrelation function. The relationship of this approach with commonly used impact line shapes will be discussed as well as implications with respect to the far line wings associated with continuum absorption due to water vapor. A theory, which satisfies detail balance and which treats the isotropic part of the collisional physics exactly and the anistropic part through perturbation theory, will be outlined

DETERMINATION OF MOLECULAR CONSTANTS OF SULFUR DIOXIDE FROM COMBINED FAR INFRARED AND MICROWAVE DATA

$^{\dag}$ Supported by the Geophysics Research Directorate, AFCRL.Author Institution: Basic Physics Division, National Physical Laboratory; $^{\dag}$ Physics Department, Providence CollegeAn interferometric method has been used to study the far infrared spectrum of sulfur dioxide. First, absorption contours from 15 to $105 cm^{-1}$ have been obtained at a resolution of $0.25 cm^{-1}$. Comparision of these contours with theoretical contours with theoretical contours computed with molecular constants determined from available microwave data shows satisfactory agreement up to about $76 cm^{-1}$ only. To make possible a more detailed analysis of the discrepancies, another set of contours for the frequency range 76 to $104 cm^{-1}$ has been obtained at the higher resolution of $0.125 cm^{-1}$. This analysis indicates that centrifugal distortion corrections of sixth and higher order in the powers of the angular momentum components may produce appreciable shifts in this frequency range. Approximate values of sixth order c.d. parameters, estimates for some of the eighth order parameters, and the corresponding corrections to the rigid rotor constants and to the fourth order c.d. parameters have been determined by an analysis of the available far infrared and microwave data. It appears impossible to obtain a similarly complete and accurate set of molecular constants from the microwave data alone

Air mass computer program for atmospheric transmittance/radiance calculation : FSCATM /

Calculations of atmospheric transmittance and radiance require the knowledge of the integrated amounts of the absorbing gases along the path. This report describes the calculation of the integrated amounts ('air mass' or 'column density') for various infrared absorbing gases for an arbitrary slant path through the atmosphere, including the effects of both curvature and refraction, and presents a Fortran program. FSCATM, to perform the calculation. Among the features of FSCATM are: 1. It calculates the layer-by-layer integrated absorber amounts and density-weighted pressure and temperature for an arbitrary slant path through the atmosphere. 2. It assumes a spherically symmetric atmospheric with exponential profiles of density and refractivity between layer boundaries. 3. It allows a variety of options for specifying the slant path. 4. It includes six representative atmospheric profiles of pressure and temperature, and of density for the gases H2O, CO2, O3, N2O, CO, CH3, and O2 and has provision for user-supplied profiles of up to 20 gases. 5. The output layering may either be generated internally or supplied by the user. 6. It portable to 32 bit word computers in single precision and compatible with both ANSI Standard FORTRAN 66 and 77. 7. It is modular and easily modified to suit the users' particular needs. A discussion of atmospheric profile data and a survey of the literature are included in appendices.Research supported by the Air Force Geophysics Laboratory, Air Force Systems Command, United States Air Force, Hanscom AFB, Massachusetts.Optical Physics Division Project 7670.ADA132108 (from http://www.dtic.mil)."9 March 1983."Includes bibliographical references (page 139).Calculations of atmospheric transmittance and radiance require the knowledge of the integrated amounts of the absorbing gases along the path. This report describes the calculation of the integrated amounts ('air mass' or 'column density') for various infrared absorbing gases for an arbitrary slant path through the atmosphere, including the effects of both curvature and refraction, and presents a Fortran program. FSCATM, to perform the calculation. Among the features of FSCATM are: 1. It calculates the layer-by-layer integrated absorber amounts and density-weighted pressure and temperature for an arbitrary slant path through the atmosphere. 2. It assumes a spherically symmetric atmospheric with exponential profiles of density and refractivity between layer boundaries. 3. It allows a variety of options for specifying the slant path. 4. It includes six representative atmospheric profiles of pressure and temperature, and of density for the gases H2O, CO2, O3, N2O, CO, CH3, and O2 and has provision for user-supplied profiles of up to 20 gases. 5. The output layering may either be generated internally or supplied by the user. 6. It portable to 32 bit word computers in single precision and compatible with both ANSI Standard FORTRAN 66 and 77. 7. It is modular and easily modified to suit the users' particular needs. A discussion of atmospheric profile data and a survey of the literature are included in appendices.Mode of access: Internet

Atmospheric transmittance/radiance : computer code LOWTRAN 4 /

"Optical Physics Division Project 7670.""28 February 1978."Includes bibliographical references.Mode of access: Internet

Algorithm for the calculation of absorption coefficient-pressure broadened molecular transitions /

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."Optical Physics Division Project 2310.""ADA047515 (from http://www.dtic.mil).""22 July 1976."Includes bibliographical references (pages 35-36).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.Mode of access: Internet