Scintillation at high latitudes during winter magnetic storms

Details Scintillation at high latitudes during winter magnetic storms Scintillation at high latitudes during winter magnetic storms

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jatp...50..565k&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 50, June 1988, p. 565-572. SERC-supported research.

Physics

4

Ionospheric Disturbances, Magnetic Storms, Satellite Transmission, Scintillation, Auroral Zones, Geomagnetic Latitude, Polar Regions, Winter

Scientific paper

Scintillation observations are described which were made at Kiruna in northern Sweden during three magnetic storm periods in the winter of 1984-1985. The results were obtained using transmissions from the multisatellite Navy Navigation Satellite System, so that it has been possible to chart the development of scintillation activity over some 20 deg of geomagnetic latitude as a function of time for several days throughout each storm. A region of strong scintillation at the highest latitudes near magnetic noon is a common feature on all but the quietest days. This feature, probably associated with soft particle precipitation into the cusp, shows an abrupt boundary which moves equatorwards as the disturbance develops. In the magnetic midnight sector two latitudinally separate zones of scintillation are found, patchy at high latitudes although more sustained in the auroral zone. An absence of auroral scintillations around midnight UT can be followed by prolonged intense scintillation activity at auroral latitudes during the early morning hours on some disturbed days.

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