Physics
Scientific paper
Aug 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.8725l&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Aug. 1, 1986, p. 8725-8741.
Physics
64
Angular Distribution, Discontinuity, Interplanetary Magnetic Fields, Data Reduction, Magnetohydrodynamics, Mariner 10 Space Probe, Pioneer 10 Space Probe, Statistical Distributions
Scientific paper
Based on Mariner 10 data, a statistical survey and an application of the Sonnerup-Cahill variance procedure to a visual identification with 1.2-s averages for time intervals corresponding to the equally spaced heliocentric distances of 1.0, 0.72 and 0.46 AU, are employed to study the characteristics of directional discontinuities (DDs) in the interplanetary magnetic field. Analysis using two methods demonstrated that the ratio of tangential discontinuities (TDs) to rotational discontinuities (RDs) decreased with decreasing radial distance. Decreases in average discontinuity thickness of 41 percent between 1.0 and 0.72 AU, and 56 percent between 1.0 and 0.46 AU, were found for both TDs and RDs, in agreement with Pioneer 10 data between 1 and 5 AU. Normalization of the individual DD thicknesses with respect to the estimated local proton gyroradius (RL) gave a nearly constant average thickness at the three locations, 36 + or - 5 RL, for both RDs and TDs.
Behannon Kenneth W.
Lepping Ronald P.
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