Period, phase and resonant structure of a pulsation event seen by the ISEE 1 and 2 spacecraft on 2-3 April 1978

Details Period, phase and resonant structure of a pulsation event seen by the ISEE 1 and 2 spacecraft on 2-3 April 1978 Period, phase and resonant structure of a pulsation event seen by the ISEE 1 and 2 spacecraft on 2-3 April 1978

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgzg...55..102g&link_type=abstract

Journal of Geophysics - Zeitschrift für Geophysik (ISSN 0340-062X), vol. 55, Sept. 1984, p. 102-107.

Physics

Geophysics

1

Earth Magnetosphere, Geomagnetic Pulsations, International Sun Earth Explorers, Magnetohydrodynamic Waves, Demodulation, Resonance Lines, Wave Propagation, Waveforms

Scientific paper

Complex demodulation is used to make estimates of the wave parameters of a pulsation event seen by the ISEE 1 and 2 spacecraft. The pulsation was observed in the early morning local time sector on April 2-3, 1978 (day 92/3). The pulsation was in the pc4 frequency range and had a strong compressional component. Pulsation activity was observed continuously for about 90 min, over a radial extent of approximately L = 9 to L = 6. The observed wave parameters show both temporal and spatial variations. It is shown that the wave period is decreasing with time and that this allows the wave ellipticity observations to be interpreted according to the theory of field line resonance.

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