Statistics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh33a1073k&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SH33A-1073
Statistics
2139 Interplanetary Shocks, 2194 Instruments And Techniques
Scientific paper
In order to determine interplanetary shock parameters, we use Wind and ACE observations of shock passages in the solar wind. Magnetic field and plasma measurements by individual spacecraft are used with the nonlinear least squares fitting technique of Szabo [1994] with an improved error analysis to calculate the local shock parameters. Further improvement of the technique includes taking into account proton temperature anisotropy and alpha-particle parameters which results in higher accuracy of the calculated shock parameters. The shock parameters calculated at the locations of both spacecraft are then compared to estimate the global shapes of the observed shocks. We present statistics of the influence of proton temperature anisotropy and alpha particle parameters on the calculated shock parameters and discuss deviation of the shock global shape from the widely used planar assumption. The improved technique can be used to analyze STEREO and near-Earth observations of interplanetary shocks.
Koval Artem
Szabo Andras
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