Electron Precipitation Parameters and Ionospheric Conductances Inferred From Auroral Images Acquired by the Visible Imaging System (VIS)on the Polar Spacecraft

Details Electron Precipitation Parameters and Ionospheric Conductances Inferred From Auroral Images Acquired by the Visible Imaging System (VIS)on the Polar Spacecraft Electron Precipitation Parameters and Ionospheric Conductances Inferred From Auroral Images Acquired by the Visible Imaging System (VIS)on the Polar Spacecraft

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa33a1632b&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SA33A-1632

Physics

2400 Ionosphere (6929), 2407 Auroral Ionosphere (2704), 2431 Ionosphere/Magnetosphere Interactions (2736), 2437 Ionospheric Dynamics, 2455 Particle Precipitation

Scientific paper

The Visible Imaging System (VIS) on the polar spacecraft provided time sequences of auroral images at multiple wavelengths that yield information of auroral dynamics on a global scale with a spatial resolution of ~ 20 km and temporal resolution of ~ 1 minute. Time sequences of VIS images in which the aurora was highly dynamic are used to infer global maps for the electron precipitation parameters, energy flux and characteristic energies, and ionospheric conductances. The maps are inferred from the corresponding VIS images using an auroral model (Lumerzheim et al., 1987). The temporal and spatial resolution of the VIS inferred patterns are unprecedented. The inferred patterns are highly structured and vary significantly on a time scale of less than 5 minutes. These patterns can be very beneficial for global physics-based numerical models for the high-latitude ionosphere which previously had to rely on statistical models for the electron precipitation and ionospheric conductance.

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