Multipoint Observations of the Ion Isotropy/b2i Boundary:q

Details Multipoint Observations of the Ion Isotropy/b2i Boundary:q Multipoint Observations of the Ion Isotropy/b2i Boundary:q

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm72a0613t&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SM72A-0613

Physics

2704 Auroral Phenomena (2407), 2716 Energetic Particles, Precipitating, 2720 Energetic Particles, Trapped, 2736 Magnetosphere/Ionosphere Interactions, 2794 Instruments And Techniques

Scientific paper

The Ion Isotropy/b2i Boundary is known to correlate well with magnetic field inclination at geosynchronous orbit and thus provides an effective means of remote sensing magnetotail stretching. As the substorm cycle involves dramatic and systematic changes in stretching, it follows that an ability to monitor this important magnetospheric boundary at high temporal resolution at several magnetic local times, or even on a global scale, may provide a valuable diagnostic tool - it may assist in directly quantifying the dynamics of the inner edge of the current sheet throughout the various phases of the auroral substorm. A complement of three instrument platforms (MSPs, SuperDARN, and the IMAGE satellite's Spectrographic Imager) provides us with an exciting new capability to monitor the Ion Isotropy/b2i Boundary on a global scale. We here demonstrate the potential value of high time resolution multipoint b2i boundary identifications in substorm research. Employing the MT index as a convenient proxy, we show how the general trend of, similarities of, and differences between index values obtained simultaneously at different MLTs via these instrument platforms can assist in quantifying the dynamics of the inner edge of the current sheet, as well as the location, timing, and spatial extent of magnetospheric disturbances.

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