Theory of refractive scattering in scintillation phenomena

Details Theory of refractive scattering in scintillation phenomena Theory of refractive scattering in scintillation phenomena

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jatp...43.1199b&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 43, Nov. 1981, p. 1199-1214.

Physics

31

Atmospheric Refraction, Atmospheric Scattering, Refractivity, Scintillation, Spectral Energy Distribution, Wave Scattering, Fourier Transformation, Fresnel Region, Power Spectra, Scatter Propagation

Scientific paper

Calculations are presented of the spatial power spectrum of density fluctuations in a reception plane parallel to the screen, for a plane wave incident upon a thin-plane, one-dimensional phase-changing screen with an intervening inverse power-law spectrum between its outer and inner scales. The lower roll-off angular spatial frequency occurs at a scale such that its geometric mean with the focal scale is equal to the Fresnel scale, and it is found that the refractive scattering dominates even for weak scattering if the spectral index value is greater than about five. For lower values, diffractive scattering dominates unless the lens scale exceeds the focal scale. Saturation of the intensity spectrum occurs when the focal scale is small compared with the Fresnel scale.

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