Accession Number : ADA294903

Title :   SHARC, A Comprehensive Non-Equilibrium Infrared Radiation Model for the Upper Atmosphere.

Descriptive Note : Technical rept.,

Corporate Author : NICHOLS RESEARCH CORP DAYTON OH

Personal Author(s) : Sundberg, R. L. ; Duff, J. W. ; Bernstein, L. S. ; Gruninger, J. H. ; Matthew, M. W.

PDF Url : ADA294903

Report Date : 21 JUN 1993

Pagination or Media Count : 33

Abstract : A new, first-principles computer model, SHARC, has been developed by the Air Force for the rapid and accurate calculation of non-LTE upper atmospheric infrared radiance and transmittance spectra with a resolution of better than 1/cm. Comprehensive coverage of the 2 micrometers to 40 micrometers (250/cm to 5,000/cm) wavelength region is provided for arbitrary lines of sight in the 50 - 300 km altitude range, accounting for the detailed production, loss, and energy transfer processes among the molecular vibrational states. Auroral production and excitation of CO2, NO, and NO+ are included in addition to quiescent atmospheric processes. Calculated vibrational temperatures are found to be similar to results from other non-LTE codes, and SHARC's equivalent-width spectral algorithm provides very good agreement with much more time-consuming "exact" line-by-line methods. (MM)

Descriptors :   *INFRARED RADIATION, *UPPER ATMOSPHERE, *ATMOSPHERIC PHYSICS, VIBRATION, AIR FORCE, MOLECULAR VIBRATION, MOLECULAR STATES, ATMOSPHERIC TEMPERATURE, ACCURACY, ENERGY TRANSFER, TRANSMITTANCE, SPECTRA, RADIANCE, AURORAE.

Subject Categories : Atmospheric Physics
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE