A High Altitude Infrared Radiance Model
Abstract
A knowledge of the natural infrared radiance originating in the earth's upper atmosphere is of interest for systems design, military surveillance and the advancement of knowledge about physical processes in the upper atmosphere. A physical model that includes experimental data on and theoretical estimates and excitation processes that lead to emission of infrared radiation has been implemented in a computer program that computes infrared radiances for an earth's limb viewing geometry. The nominal spectral region of this study lies between 2.7 and 25 micrometers and emphasis is placed on radiation originating at altitudes between 70 and 500 km. The physical model is described, with emphasis on the changes required in extending its usefulness. Application of the computer program is described. Model predictions are compared with radiance data obtained in the ICECAP auroral studies program. This comparison is used to illustrate uncertainties in results due to assumptions made in the model and lack of data on actual atmospheric composition.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 30, 1977
- Accession Number
- ADA059242
Entities
People
- H. J. Smith
- T. C. Degges