On the scintillation probability distribution function (ionosphere).
Abstract
An attempt is made to show that conclusions related to the probability distribution function (pdf) of a scintillating signal can be drawn from a scintillation theory based on the parabolicequation method. The basis for theoretical studies of scintillation pdfs is outlined, and the ionospheric scintillation index is calculated from the first and secondorder moments of complex wave amplitude on the assumptions of a Gaussian pdf of logarithmic amplitude and phase (LD) and a Gaussian pdf of quadrature signal components (GD). It is also assumed that ionospheric permittivity fluctuations follow Gaussian statistics. The results indicate that LD is a satisfactory assumption for a small signal parameter, that the range of wave parameters for which LD is valid becomes narrower as scattering strength increases, and that GD is a good assumption only for a large wave parameter.
 Publication:

Acta Geophysica Polonica
 Pub Date:
 1979
 Bibcode:
 1979AcGeP..27...85W
 Keywords:

 Earth Ionosphere;
 Probability Distribution Functions;
 Radio Transmission;
 Scintillation;
 Wave Propagation;
 Amplitudes;
 Normal Density Functions;
 Permittivity;
 Wave Scattering;
 Geophysics;
 Earth Ionosphere:Scintillations