Authors

I. G. E. Renhorn; T. Svensson; G. R. Carlsson; S. Cronstrom;G. D. Boreman

Comments

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Abbreviated Journal Title

Opt. Eng.

Keywords

middle-wave infrared; image scintillation; infrared; turbulence; infrared imaging; OPTICAL SCINTILLOMETER; SATURATION; TURBULENCE; SPECTRA; Optics

Abstract

Atmospheric scintillation effects on point targets and small targets are studied in the middle-wave infrared (MWIR) band over a 2.5-km horizontal path. Expressions are presented for both exact numerical calculations and for a Gaussian-aperture approximation of scintillation that has an accurate analytic solution. Experimental results show that measurements of C-n(2) using a commercial NIR scintillometer allow the prediction of average scintillation levels in the MWIR when corrections are made for wavelength and dimensions of the source and receiver. The measured log-irradiance values are approximately lognormal, and are about a factor of 2 higher than would have been expected from theory. Our results are relevant for analysis of detection and false-alarm probabilities over long horizontal paths in the MWIR.

Journal Title

Optical Engineering

Volume

45

Issue/Number

1

Publication Date

1-1-2006

Document Type

Article

Language

English

First Page

9

WOS Identifier

WOS:000235481400028

ISSN

0091-3286

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