Theory of thin-screen scintillations for a spherical wave

Details Theory of thin-screen scintillations for a spherical wave Theory of thin-screen scintillations for a spherical wave

Dec 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...218..468l&link_type=abstract

Astrophysical Journal, Part 1, vol. 218, Dec. 1, 1977, p. 468-476.

Physics

Optics

10

Crab Nebula, Electromagnetic Scattering, Scintillation, Spherical Waves, Turbulence Effects, Atmospheric Optics, Atmospheric Turbulence, Image Processing, Pulse Duration, Radiative Transfer

Scientific paper

A thin-screen scintillation theory for a spherical wave is presented under the 'quasi-optical' approximation. The 'scattering angle', the 'observed angle', the intensity correlation function, and the temporal pulse broadening are calculated for the random wave. It is found that as the wave propagates outward away from the phase screen, the correlation scale of the intensity fluctuation increases linearly while the 'observed angle' decreases linearly. The calculations are carried out for both Gaussian and power-law spectra of the turbulent medium. The results are applied to an analysis of the scattering data for the Crab Nebula's radiation.

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