Accession Number : AD0722435

Title :   High Latitude Sporadic E.

Descriptive Note : Environmental research papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Pittenger,Eugene W. ; Gassmann,George J.

Report Date : 05 FEB 1971

Pagination or Media Count : 66

Abstract : Previous research results on high latitude sporadic E are surveyed, and replotted and displayed in Corrected Geomagnetic Latitude (CGL) AND Corrected Geomagnetic Time (CGT) and related to current research results. Patterns of occurrence of sporadic E are developed, showing percent of time of occurrence in location in the CGL/CGT coordinate system, in terms of sporadic E top frequency (fE sub s) and magnetic activity level. Patterns of E sub s occurrence are related to concepts of the auroral oval, polar cap, and substorms. Sporadic E with top frequency = or > MHz is related to substorms. This sporadic E occurs in the late evening-early night sector of the CGL/CGT coordinate system. Implications of sporadic E on high latitude HF propagation during solar cycle maximum and minimum are discussed. (Author)

Descriptors :   (*IONOSPHERE, ATMOSPHERE MODELS), (*IONOSPHERIC DISTURBANCES, ARCTIC REGIONS), IONOSPHERIC PROPAGATION, HIGH FREQUENCY, AURORAE, MAGNETIC STORMS

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE