Resolving the Temporal and Spatial Ambiguity of Auroral Forms and Electrodynamics Using Multiple DMSP Spacecraft

Details Resolving the Temporal and Spatial Ambiguity of Auroral Forms and Electrodynamics Using Multiple DMSP Spacecraft Resolving the Temporal and Spatial Ambiguity of Auroral Forms and Electrodynamics Using Multiple DMSP Spacecraft

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm33a2123a&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM33A-2123

Physics

[2431] Ionosphere / Ionosphere/Magnetosphere Interactions, [2704] Magnetospheric Physics / Auroral Phenomena, [2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions

Scientific paper

Knowledge of the temporal and spatial relationships of electric fields and auroral structures in the auroral oval is crucial in understanding auroral processes and the coupling between the ionosphere and magnetosphere. However, separation of spatial and temporal effects is completely ambiguous with single satellites. The DMSP spacecraft provide an opportunity to separate these effects due to simultaneously operating multiple spacecraft in similar orbital planes with nearly identical instruments measuring ion drifts, energetic particle distributions, and magnetic fields. At times during the past 20 years, there have been up to five simultaneously operating DMSP spacecraft with up to three in nearly identical orbital planes. Due to slightly different orbital periods, these spacecraft were often operating in the same spatial regime with separations of minutes or less. These characteristics provide a unique opportunity to resolve the spatial/temporal ambiguity of auroral forms and electrodynamic structures and determine the spatial scales and the temporal coherence of such features.

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