A statistical study on Psc 4 and Psc 5 observed by geostationary satellites

Details A statistical study on Psc 4 and Psc 5 observed by geostationary satellites A statistical study on Psc 4 and Psc 5 observed by geostationary satellites

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985p%26ss...33..365n&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 33, April 1985, p. 365-372.

Computer Science

4

Earth Magnetosphere, Geomagnetic Latitude, Geomagnetic Micropulsations, Ionospheric Disturbances, Satellite Observation, Sudden Storm Commencements, Diurnal Variations, Magnetic Effects, Magnetic Equator, Pulse Compression, Solar Wind, Statistical Analysis, Synchronous Satellites

Scientific paper

The long period pulsations associated with the sudden commencement (SC) events Psc 4 and Psc 5 are analyzed statistically, on the basis of magnetic data from the geostationary ATS 6 and SMS/GOES satellites. The local time and latitude dependence of the occurrence, and the local time dependence of period and amplitude were examined for a total of 218 SC events. For transverse Psc 5 pulsations which could be observed at local times, the period was shorter and the amplitude was smaller near noon than in the morning or the evening. Compressional Psc 5 pulsations had larger amplitudes near noon. For Psc 4 pulsations, periods tended to be shorter near noon. On the basis of the statistical analysis, it is suggested that transverse Psc 5 pulsations can be characterized as magnetic field line resonant oscillations excited by impulsive waves. Psc 5 pulsations are characterized as local oscillations near the geomagnetic equator.

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