SHARC, a comprehensive non-equilibrium infrared radiation model for the upper atmosphere. Technical report

Technical Report · Mon Jun 21 04:00:00 EDT 1993

OSTI ID:128296

Sundberg, R L; Duff, J W; Bernstein, L S; Gruninger, J H; Matthew, M W

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.

• Research Organization: Nichols Research Corp., Dayton, OH (United States)
• OSTI ID: 128296
• Report Number(s): AD-A--294903/0/XAB; SSI-TR--228; CNN: Contract F19628-91-C-0083
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ALTITUDE
AURORAE
CARBON DIOXIDE
COMPUTERIZED SIMULATION
EARTH ATMOSPHERE
EQUILIBRIUM
EXCITATION
INFRARED RADIATION
IONOSPHERE
LTE
MOLECULAR STRUCTURE
RADIATION TRANSPORT
VIBRATIONAL STATES