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Proceedings Paper

Spatial and temporal variability of SWIR air glow measurements
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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 has been demonstrated as an effective illumination source for 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 air glow region. These spatiotemporal 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. We are interested in studying these phenomena for a variety of reasons. First they can give an insight into upper atmospheric physics, second we would like to understand the variations in order to determine if air glow can be used as a reliable illumination source for night time terrestrial imaging. To that end we have been collecting data on ground irradiance from air glow over the past six months at a site on the island of Kauai. The purpose of this paper is to discuss some initial analysis of this data.

Paper Details

Date Published: 11 October 2010
PDF: 9 pages
Proc. SPIE 7828, Optics in Atmospheric Propagation and Adaptive Systems XIII, 78280E (11 October 2010); doi: 10.1117/12.866767
Show Author Affiliations
David Dayton, Applied Technology Associates (United States)
Jeff Allen, Applied Technology Associates (United States)
John Gonglewski, Air Force Research Lab. (United States)
Mike Myers, Air Force Research Lab. (United States)
Gregory Fertig, Air Force Research Lab. (United States)
Rudy Nolasco, Applied Technology Associates (United States)
Francisco Maia, Textron Defense Systems Kauai (United States)

Published in SPIE Proceedings Vol. 7828:
Optics in Atmospheric Propagation and Adaptive Systems XIII
Karin Stein; John D. Gonglewski, Editor(s)

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