Energetics of ULF/ELF plasma waves in the solar wind and outer Earth's magnetosphere

Details Energetics of ULF/ELF plasma waves in the solar wind and outer Earth's magnetosphere Energetics of ULF/ELF plasma waves in the solar wind and outer Earth's magnetosphere

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.346...95k&link_type=abstract

In ESA, Study of the Solar-Terrestrial System p 95-100 (SEE N93-31674 12-90)

Computer Science

Sound

Collisionless Plasmas, Earth Magnetosphere, Extremely Low Radio Frequencies, Magnetohydrodynamic Flow, Plasma Spectra, Plasma Waves, Shock Waves, Solar Wind, Electric Fields, Flux (Rate), Magnetic Fields, Magnetosheath, Prognoz Satellites

Scientific paper

Studies of ULF/ELF waves (0.1 to 100 Hz) in both quiet and disturbed magnetospheric conditions during the high apogee orbits of the Prognoz 8 (1980) and Prognoz 10 (1985) satellites and the low noise level of electric field, magnetic field, and plasma flux fluctuation instruments, are discussed. Direct measurements in the solar wind in the ULF/ELF range of fluctuation spectra of electric field E and ion component of plasma flux P showed that hourly averaged E and F spectra are in quiet conditions for E = 0.0001 to 0.000001 V/mHz (2 to 105 Hz) and for F = (1,000,000 to 10,000) counts/cm s Hz (2 to 70 Hz). In the disturbed conditions (on the sector boundaries and discontinuities), hourly averaged values of power spectral density are 2:3 times higher than in quiet regions. It was shown that most of the solar wind energy dissipation in the bow shock front is provided by the oscillations in the Doppler shifted lower hybrid frequency range (5 to 30 Hz) 10(exp -11) erg/cu cm rather than by ionosound oscillations 10(exp -15) erg/cu cm.

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