SHARC, A Comprehensive Non-Equilibrium Infrared Radiation Model for the Upper Atmosphere.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 21, 1993
- Accession Number
- ADA294903
Entities
People
- J. H. Gruninger
- J. W. Duff
- L. S. Bernstein
- M. W. Matthew
- R. L. Sundberg