High Latitude Sporadic E.

• Main Authors: Pittenger,Eugene W., Gassmann,George J.
• Other Authors: AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS
• Format: Text
• Language: English
• Published: 1971
• Subjects: Atmospheric Physics; (*IONOSPHERE; ATMOSPHERE MODELS); (*IONOSPHERIC DISTURBANCES; ARCTIC REGIONS); IONOSPHERIC PROPAGATION; HIGH FREQUENCY; AURORAE; MAGNETIC STORMS; AURORAL SPORADIC E LAYER; *SPORADIC E LAYER; Arctic
• Online Access: http://www.dtic.mil/docs/citations/AD0722435; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0722435

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)