SHARC-3: a model for infrared atmospheric radiance at high altitudes

John H. Gruninger; Robert L. Sundberg; James W. Duff; Lawrence S. Bernstein; Michael W. Matthew; Steven M. Adler-Golden; David C. Robertson; Ramesh D. Sharma; James H. Brown; Rebecca J. Healey

doi:10.1117/12.177908

15 June 1994 SHARC-3: a model for infrared atmospheric radiance at high altitudes

John H. Gruninger, Robert L. Sundberg, James W. Duff, Lawrence S. Bernstein, Michael W. Matthew, Steven M. Adler-Golden, David C. Robertson, Ramesh D. Sharma, James H. Brown, Rebecca J. Healey

Author Affiliations +

Proceedings Volume 2223, Characterization and Propagation of Sources and Backgrounds; (1994) https://doi.org/10.1117/12.177908
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

Abstract

This paper describes the development of a new version of the SHARC code, SHARC-3, which includes the ability to simulate changing atmospheric conditions along the line-of-sight (LOS) paths being calculated. SHARC has been developed by the U.S. Air Force for the rapid and accurate calculation of upper atmospheric IR radiance and transmittance spectra with a resolution of better than 1 cm^-1 in the 2 to 40 micrometers (250 to 5,000 cm^-1) wavelength region for arbitrary LOSs in the 50 - 300 km altitude regime. SHARC accounts for the production, loss, and energy transfer processes among the molecular vibrational states important to this spectral region. 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. Calculations and data comparisons illustrating the features of SHARC-3 are presented.

Citation Download Citation

John H. Gruninger, Robert L. Sundberg, James W. Duff, Lawrence S. Bernstein, Michael W. Matthew, Steven M. Adler-Golden, David C. Robertson, Ramesh D. Sharma, James H. Brown, and Rebecca J. Healey "SHARC-3: a model for infrared atmospheric radiance at high altitudes", Proc. SPIE 2223, Characterization and Propagation of Sources and Backgrounds, (15 June 1994); https://doi.org/10.1117/12.177908

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available