Multiple ground-based and satellite observations of global Pi 2 magnetic pulsations

Details Multiple ground-based and satellite observations of global Pi 2 magnetic pulsations Multiple ground-based and satellite observations of global Pi 2 magnetic pulsations

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9515175y&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Sept. 1, 1990, p. 15175-15184. Research supported by NASA.

Physics

34

Earth Magnetosphere, Field Aligned Currents, Geomagnetic Pulsations, Ground Stations, Satellite Observation, Earth Ionosphere, Magnetic Storms, Polar Regions, Southern Hemisphere

Scientific paper

Four Pi 2 events are examined using data obtained concurrently at the Syowa-Iceland conjugate stations, the EISCAT-Magnetometer Cross, low-latitude stations HER on the nightside and KAK on the dayside, and at AMPTE/CCE in the outer magnetosphere during the period from 2300 UT on May 22 to 0300 UT on May 23, 1985. Several characteristics of Pi 2 are established on the basis of high time resolution magnetic field data. First of all, horizontal components, H and D, of the Pi 2 oscillate nearly antiphase and in-phase, respectively, between the high- and low-altitude stations in the midnight southern hemisphere. Both H and D components of the Pi 2 have nearly in-phase relationships between the nightside and the dayside stations at low altitude. The Pi 2 amplitude is larger at the high-latitude station and decreases toward low latitudes. The dominant periods of the Pi 2 are nearly identical at all stations.

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