Electric Field and Plasma Density Estimates of Bow Shock Normals

Details Electric Field and Plasma Density Estimates of Bow Shock Normals Electric Field and Plasma Density Estimates of Bow Shock Normals

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm11d..04p&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SM11D-04

Physics

2712 Electric Fields (2411), 2784 Solar Wind/Magnetosphere Interactions, 7851 Shock Waves

Scientific paper

The typical method for calculating the normal direction of a planar boundary in a space plasma uses a variational analysis technique. The Cluster mission, with four spacecraft, allows calculation of the same normal from timing the boundary crossings on the four spacecraft, using the spacecraft potential change as the boundary indicator. About 50 quasi-perpendicular bow shock crossings, between local times of about 0900 to 1600, have been analyzed to determine the boundary normal and speed in this way. At these same boundaries, the shock normal was also calculated on each spacecraft as the maximum variance direction of the electric field. The normal found from timing was compared to the four normals resulting from the variational analyses to place limits on the planar assumption of the timing analysis and fluctuations of the boundary normal.

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