Mathematics
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.217..649g&link_type=abstract
In ESA Achievements of the Intern. Magnetospheric Study (IMS) p 649-654 (SEE N85-24544 14-46)
Mathematics
Geomagnetic Latitude, Geomagnetic Pulsations, Phase Modulation, Pulse Amplitude, Eigenvectors, Magnetic Flux, Mathematical Models, Oxygen Ions
Scientific paper
A model which predicts the latitudinal amplitude and phase of geomagnetic pulsations as seen on the ground is described. The model treats each field line as a separate harmonic oscillator with a natural frequency equivalent to the standing wave frequency. The model flux tubes can be driven by a variety of monochromatic or pulsed waves. Given an assumed variation of natural frequency with latitude, the latitudinal resonant widths of continuous pulsations were examined for different damping estimates and conditions. Impulsively generated pulsations yield information in the damping, and are used to simulate short-lived daytime or nighttime pulsations. An interval of quiet magnetospheric activity when GEOS-1 particle estimates showed that O+ ions were an important component in the plasmatrough is considered. The charactetistics of five different pulsation events recorded in the interval are compared with model results.
Gough H.
Orr Daniel
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