Multidimensional Time Dependent Structure and Mechanisms for Non-LTE CO2 Infrared Emissions and 4.3 Micrometers Aurora.
Abstract
The effort was concerned with development of a two dimensional time dependent radiation transport model of the CO2 4.3 micrometer aurora. Predictions of spatial structure in auroral nadir radiance, and experimental concepts for verification were addressed. Nadir radiance gradients in the CO2 4.3 micrometer aurora are predicted to be comparable to those in the 2.7 micrometer aurora even though the DC component of the former is approx. 10 times the brighter. A rocket borne arc over flown cryogenically cooled tilting etalon spectrometer in series with CO2 absorption cell wheel is shown to be the optimum experiment to provide verification. The modelling facility is also used to estimate the 4.3 micrometer signal levels that might be observed in the electron gun mother-sensor module daughter spatial EXCEDE experiment and to delineate emission mechanisms for that experiment. A detailed investigation of the CO2 4.3 micrometer zenith radiance data obtained under undisturbed night time conditions on 4/11/74 revealed compelling evidence for the existence of an OH airglow related mechanism for producing structured CO2 4.3 micrometer radiance under undisturbed night time conditions. Detailed LWIR CO2 emission earthlimb synthetic spectra that are pumped by structured mechanisms such as aurora, airglow and fluorescence are also presented.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 1979
- Accession Number
- ADA084940
Entities
People
- J. B. Kumer
Organizations
- Lockheed Martin Missiles and Space