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Dynamic behavior of solar wind as revealed by a correlation study of magnetic fields observed at the Venus and Earth orbitsCorrelations between interplanetary magnetic fields (IMFs) at 0.72 AU and 1.0 AU have been examined using data sets obtained from the Pioneer Venus orbiter and Earth-orbiting spacecraft. While the two-sector structures are evident in long-term variations at these two heliocentric distances, the corresponding auto-correlation coefficients are consistently smaller at 1.0 AU than at 0.72 AU. This suggests that the IMF structures become less persistent at 1.0 AU due to the effects of changing solar wind dynamics between the Venus and Earth orbits. Short-term variations exhibit generally poor correlations between IMFs near Venus and those near Earth, though good correlations are sometimes obtained for well-defined structures when the Sun, Venus, and Earth are closely aligned. The rather poor correlations in the background streams indicate that the IMFs are still changing between the Venus and Earth orbits under the strong influence of solar wind dynamics.
Document ID
19950052986
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Marubashi, K.
(Communications Research Lab. Tokyo, Japan)
Date Acquired
August 16, 2013
Publication Date
January 1, 1995
Publication Information
Publication: Advances in Space Research
Volume: 16
Issue: 9
ISSN: 0273-1177
Subject Category
Solar Physics
Accession Number
95A84585
Distribution Limits
Public
Copyright
Other

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