World wide study of horizontal drift and anisotropy of ionospheric irregularities in the E-region

Abstract

An attempt has been made to study the latitude variation of anisotropy and drift parameters of ionospheric irregularities in E-region using IGY data of Waltair, Yamagawa, Debilt and Halley Bay. A systematic variation in most of the drift and anisotropy parameters is observed from equatorial to very high latitude stations with the exception of polar regions for which the values are found to be entirely different. Harmonic analysis of N-S and E-W components has shown that the semi-diurnal component is predominant in all stations except Waltair. The sense of rotation is found to be clockwise in northern hemisphere for all stations except Yamagawa and anti-clockwise in southern hemisphere. The results were compared with those of earlier investigators at different latitudes.