Accession Number : AD0616859

Title :   SOME IRREGULAR VARIATIONS OF THE ELECTRON DENSITY IN THE TOPSIDE OF THE IONOSPHERE.

Descriptive Note : Summary,

Corporate Author : DEFENCE RESEARCH TELECOMMUNICATIONS ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s) : Nelms,G. L. ; Warren,E. S.

Report Date : 1964

Pagination or Media Count : 3

Abstract : Distributions of electron number density between the peak of the F layer and 1000 km height, for the region between 80 N and 70 S latitude at about 75 W longitude, are presented for a variety of local times. From such distributions it is shown that: (1) Large scale irregularities are typical of the polar ionosphere at invariant magnetic latitudes greater than 70 at all times of day. (2) At low latitudes a diurnal change in the electron scale height at 800 km above ground is typical of the ionosphere at low latitudes; this is indicative of a diurnal change in the ionic composition of the F layer. The results are given of a study of the topside ionosphere during the geomagnetic storm of September 21, 1963. The behaviour of the maximum electron density of the F layer during the storm is compared with the behaviour for a quiet day period for a wide range of latitudes. During storms large deviations from mean values of electron density occur over the range of invariant latitudes from 25 to 70; during quiet days there occur only minor deviations in this region. (Author)

Descriptors :   (*IONOSPHERE, ELECTRON DENSITY), (*ELECTRON DENSITY, IONOSPHERE), IONOSPHERIC DISTURBANCES, DIURNAL VARIATIONS, ATMOSPHERIC SOUNDING, CANADA

Distribution Statement : APPROVED FOR PUBLIC RELEASE