STARE observations of a Pc 5 pulsation with large azimuthal wave number

Details STARE observations of a Pc 5 pulsation with large azimuthal wave number STARE observations of a Pc 5 pulsation with large azimuthal wave number

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.6163a&link_type=abstract

Journal of Geophysical Research, vol. 87, Aug. 1, 1982, p. 6163-6172.

Physics

79

Geomagnetic Pulsations, Radar Measurement, Radio Auroras, Drift Rate, Magnetohydrodynamic Stability, Phase Velocity

Scientific paper

The Scandinavian Twin Auroral Radar Experiment is used to analyze a new type of Pc 5 pulsation which occurred during local magnetic afternoon. It had an amplitude of less than about 5 mV/m in the ionosphere, a 220-385 sec period, and an azimuthal wave number that was large, at approximately 35, and varied in a way that kept the azimuthal phase velocity approximately constant for a given geomagnetic latitude. Its propagation was geomagnetic westward. A determination of wave phase velocity by hot proton drift motions near the equatorial plane was suggested when wave properties were mapped onto the equatorial plane. Observational results are compared with theoretical properties of the drift mirror instability.

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