Other
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm11d..02b&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SM11D-02
Other
2154 Planetary Bow Shocks, 2724 Magnetopause, Cusp, And Boundary Layers, 2794 Instruments And Techniques
Scientific paper
The magnetic field investigation on the four-spacecraft Cluster mission has already provided a large number of observations from the four, closely-spaced spacecraft in the magnetosphere and through its boundaries,as well as in the upstream solar wind. The magnetic field data show, evenat the separations of about 600 km, the complexity of magnetosphericprocesses when seen in three dimensions. A selection of events ispresented, illustrating the capabilities of the four-point magnetic fieldmeasurements from the dayside magnetopause, the magnetosheath, the bow shockand the solar wind. In all cases, the three-dimensional aspects of theobservations are emphasised, comparing the magnetic field profiles anddeducing the dynamics and structures of the observed phenomena on theseparation scales. In many cases the interpretation of the observations isrelatively straightforward, such as for the quasi-perpendicular bow shockor many of the magnetopause crossings. In other cases, particularly in thecase of quasi-parallel bow shock crossings, in the magnetosheath and evenin the dayside cusps the correlation of the observations is more complex asthe dynamic scales may well be smaller than the spacecraft separations. Inall cases, however, the magnetic field observations point the way to newinsights into small-scale phenomena in near-Earth space plasmas.
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