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Proceedings Paper

Spatial and temporal variability of SWIR air glow measurements
Author(s): Jeffery Allan; David Dayton; John Gonglewski; Michael Myers; Rudolf Nolasco
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Paper Abstract

It is well known that luminance from photo-chemical reactions of hydroxyl ions in the upper atmosphere (~85 km altitude) produces a significant amount of night time radiation in the short wave infra-red (SWIR) band between 0.9 and 1.7 μm wave length. This phenomenon, often referred to as airglow, has been demonstrated as an effective illumination source for passive low light level night time imaging applications. It addition it has been shown that observation of the spatial and temporal variations of the illumination can be used to characterize atmospheric tidal wave actions in the airglow region. These spatio-temporal variations manifest themselves as traveling wave patterns whose period and velocity are related to the wind velocity at 85 km as well as the turbulence induced by atmospheric vertical instabilities. In this paper we present nearly a year of airglow observations over the whole sky, showing long term and short term fluctuations to characterize SWIR night time image system performance.

Paper Details

Date Published: 9 May 2011
PDF: 8 pages
Proc. SPIE 8014, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXII, 80140V (9 May 2011); doi: 10.1117/12.883087
Show Author Affiliations
Jeffery Allan, Applied Technology Associates (United States)
David Dayton, Applied Technology Associates (United States)
John Gonglewski, Air Force Research Lab. (United States)
Michael Myers, Air Force Research Lab. (United States)
Rudolf Nolasco, Applied Technology Associates (United States)

Published in SPIE Proceedings Vol. 8014:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXII
Gerald C. Holst; Keith A. Krapels, Editor(s)

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