Notes on correlation methods for evaluating ionospheric winds from radio fading records

Abstract

A correlation method requiring six values of the correlation coefficient is developed. Expressions for the drift velocity, fading velocity, and characteristic velocity are obtained from a correlation theory extended to include an elliptical contour in the horizontal plane. The physical significance of the derived velocities is considered. Preliminary data indicate that the correlation ellipse exhibits a preferred orientation and that fading associated with random changes is as important as fading associated with a drifting pattern.

On the analysis and interpretation of spaced‐receiver measurements of transionospheric radio waves

“…Various schemes have been devised to estimate the parameters that characterize the correlation ellipses. The papers by Phillips and Spencer [1955], Yerg [1955], and Fedor [1967] are Copyright 1982 by the American Geophysical Union.…”