Characteristics of shipborne targets in warm coastal environments in mid- and longwave IR

Karin Stein

doi:10.1117/12.298067

15 January 1998 Characteristics of shipborne targets in warm coastal environments in mid- and longwave IR

Karin Stein

Proceedings Volume 3219, Optics in Atmospheric Propagation and Adaptive Systems II; (1998) https://doi.org/10.1117/12.298067
Event: Aerospace Remote Sensing '97, 1997, London, United Kingdom

Abstract

In July 1996 FGAN-FfO participated in the LAPTEX (low altitude point target experiment) trial in Crete. Aim of this experiment was to improve the knowledge of environmental factors that impact EO system performance in the marine boundary layer. The atmospheric conditions were subtropic with absolute humidities higher than 15 g/m³. FGAN-FfO used two IR-cameras working in different bands for tracking an IR point source mounted on a ship sailing away from the observation site to the horizon. This paper deals with the analysis of the signal decrease with range under different atmospheric conditions. The measurements are compared with LOWTRAN 7 model predictions. Moreover, we studied the detection range performance under certain refraction conditions and the signal increase due to atmospheric focusing effects near the sea surface.

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Karin Stein "Characteristics of shipborne targets in warm coastal environments in mid- and longwave IR", Proc. SPIE 3219, Optics in Atmospheric Propagation and Adaptive Systems II, (15 January 1998); https://doi.org/10.1117/12.298067

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KEYWORDS

Long wavelength infrared

Mid-IR

Atmospheric sensing

Humidity

Infrared search and track

Ocean optics

Refraction

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