Localized auroral disturbance in the morning sector of topside ionosphere as a standing electromagnetic wave

Details Localized auroral disturbance in the morning sector of topside ionosphere as a standing electromagnetic wave Localized auroral disturbance in the morning sector of topside ionosphere as a standing electromagnetic wave

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985p%26ss...33..597d&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 33, June 1985, p. 597-606.

Computer Science

27

Auroral Zones, Electromagnetic Radiation, Ionospheric Disturbances, Satellite Observation, Standing Waves, Upper Ionosphere, Electric Fields, Intercosmos Satellites, Magnetic Fields, Plasma Density, Space Plasmas

Scientific paper

The fine structure and plasma properties of an auroral disturbance observed with the Intercosmos-Bulgaria-1300 satellite are analyzed. The disturbance was detected in the morning sector of the sky at an altitude of about 850 km in December of 1981. Strong 'jumps' (about 80 mV/m) in the electric and magnetic fields and fluctuations of ion density were detected within the disturbance. The electric and magnetic fields were characterized by a distinct spatial-temporal relationship typical for a standing quasi-monochromatic wave with a frequency of 1 Hz. The ratio of the amplitudes of electric and magnetic fluctuations was equal to the velocity of Alfven waves. The strong parallel component of the electric field (about 30 mV/m) and the large ion density of the fluctuations indicate changes in the plasma properties of the disturbance. The possibility of anomalous resistivity effects in the disturbance is also briefly considered.

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