1 January 2006 Infrared image scintillation: comparison of modeling and measurement
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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 Cn2 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.
© (2006) Society of Photo-Optical Instrumentation Engineers (SPIE)
Ingmar G. E. Renhorn, Ingmar G. E. Renhorn, Thomas Svensson, Thomas Svensson, Göran Carlsson, Göran Carlsson, Staffan Cronström, Staffan Cronström, Glenn David Boreman, Glenn David Boreman, "Infrared image scintillation: comparison of modeling and measurement," Optical Engineering 45(1), 016001 (1 January 2006). https://doi.org/10.1117/1.2158976 . Submission:
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