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Intensity fluctuations due to an incoherent extended source seen through extended strong turbulence
Author(s) -
Rumsey V. H.
Publication year - 1976
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs011i006p00545
Subject(s) - scintillation , turbulence , physics , intensity (physics) , scintillometer , turbulence kinetic energy , spectral density , correlation function (quantum field theory) , computational physics , power law , function (biology) , optics , mathematics , mechanics , statistics , quantum mechanics , evolutionary biology , detector , dielectric , biology
The intensity correlation function for an extended incoherent source seen through strong turbulence is worked out assuming that the intensity randomization U ≫ 1. The scintillation index is found as a function of source angular size θ 0 , path length z , wave number k , strength of turbulence A , and slope of the assumed power law turbulence spectrum α (α = 11/3 for the Kolmogoroff case). The scintillation index drops to about 0.5 when A k 2 Z α θ 0 α−2 ≈ 1.