Dependence of cusp ion structures on a satellite orbit

Details Dependence of cusp ion structures on a satellite orbit Dependence of cusp ion structures on a satellite orbit

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm11a1693c&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM11A-1693

Physics

Plasma Physics

[2706] Magnetospheric Physics / Cusp, [2723] Magnetospheric Physics / Magnetic Reconnection, [7833] Space Plasma Physics / Mathematical And Numerical Techniques, [7845] Space Plasma Physics / Particle Acceleration

Scientific paper

Dispersed energy patterns in cusp ion structures have been used to infer locations and properties of dayside reconnection. The particular satellite track relative to the cusp, however, creates ambiguities in the satellite observation such that one needs multiple satellites in the cusp to distinguish between temporal and spatial structures, which are related to temporal and spatial variations of dayside reconnection. In this study, we investigate whether a satellite orbit is also a factor that affects the particular morphology of observed cusp ion structures. To study the dependence, we first run the OpenGGCM 3D global MHD model with an input of due southward or northward IMF. Then, we use a Liouville Theorem Particle Tracer to model cusp ion structures from multiple virtual satellites whose orbits pass through different parts of the cusp. We find that for the same solar wind and IMF conditions, a satellite can observe variety of cusp ion structures depending on its orbit. We show in detail how the morphology of the cusp ion structures changes as a function of satellite orbit, and where the observed ions originate.

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