Physics – Plasma Physics
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jgra..11006208s&link_type=abstract
Journal of Geophysical Research, Volume 110, Issue A6, CiteID A06208
Physics
Plasma Physics
14
Magnetospheric Physics: Magnetopause And Boundary Layers, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Instruments And Techniques, Space Plasma Physics: Electrostatic Structures
Scientific paper
We present a new least squares technique for the determination of axis orientation, motion, and intrinsic axial electric field for two-dimensional coherent structures in a space plasma. This single-spacecraft method is based on Faraday's law, which, under the model assumptions, requires the intrinsic axial electric field to be constant in space and time. The technique is applied to two flux transfer events seen by the four Cluster spacecraft, although data from only one of them (Cluster 1) is used in the analysis. For these events, excellent agreement is found with the orientations obtained from optimal Grad-Shafranov reconstruction (Hasegawa et al., 2005), a method that uses data from all four Cluster spacecraft. However, the new method can also fail to produce such agreement. It must therefore be used with caution.
Hasegawa Hidenao
Sonnerup Bengt U. Ö.
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