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Some features of the small-scale solar wind fluctuationsWe have investigated small-scale variations of the solar wind ion flux measured with Faraday cups onboard the Prognoz-8 satellite. These measurements have a high time resolution of 1.24 seconds for intervals with a duration of several hours and as high as 0.02 seconds for some periods of about 1 hour duration. The main goal of this work is the determination of the quantitative features of fast ion flux fluctuations using mainly spectral analysis but also other methods. We also identify their association with interplanetary plasma parameters. Particularly, it is shown that the slope of the power spectra in the frequency range from 1E-4 to 6E-2 Hz is close to the classical Kolmogorov (-5/3) law. We also discuss some intervals with a very high level of the relative amplitude of flux fluctuations (10-20 percent) which were observed near the Earth's bow shock in the foreshock region. The use of the wavelet method for the long time series allows us to study the temporal evolution of power spectra.
Document ID
19960021427
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
Authors
Zastenker, G.
(Institute of Space Research Moscow, USSR)
Eiges, P.
(Institute of Space Research Moscow, USSR)
Avanov, L.
(Institute of Space Research Moscow, USSR)
Astafyeva, N.
(Institute of Space Research Moscow, USSR)
Zurbuchen, Th.
(Bern Univ. Bern, Switzerland)
Bochsler, P.
(Bern Univ. Bern, Switzerland)
Date Acquired
August 17, 2013
Publication Date
June 30, 1995
Subject Category
Solar Physics
Accession Number
96N24823
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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