Comparison of phase and amplitude structures of Pc 5 pulsations in the morning and afternoon sectors

Details Comparison of phase and amplitude structures of Pc 5 pulsations in the morning and afternoon sectors Comparison of phase and amplitude structures of Pc 5 pulsations in the morning and afternoon sectors

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88..881s&link_type=abstract

Journal of Geophysical Research, vol. 88, Feb. 1, 1983, p. 881-888.

Physics

3

Geomagnetic Micropulsations, Picosecond Pulses, Diurnal Variations, Frequency Distribution, International Magnetospheric Study, Pulse Amplitude, Temporal Distribution

Scientific paper

North American IMS magnetometer network data are used in comparisons of the spatial phase and amplitude structures of the morning and afternoon Pc 5 pulsations, using cross spectral analysis of phase and amplitude readings between different stations. The spatial phase structures are found to be very similar in the morning and afternoon sectors for each of the three components. Amplitudes are larger in the magnetic north than in the magnetic east components for both sectors. Latitudinal amplitude and phase difference variations between the magnetic north and east components exhibit dissimilarities in the morning and afternoon sectors. These results suggest that compressional mode magnetic field oscillations are not observable on the ground in this time sector. The pulsations in both time sectors are instead seen as caused by transverse mode magnetospheric field oscillations.

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