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Electron Precipitation Parameters and Ionospheric Conductances Inferred from Auroral Images Acquired by the Visible Imaging Systems (VIS) on the Polar SpacecraftThe 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 approx. 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.
Document ID
20090006820
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Sigwarth, John B.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bekerat, Hamed A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 24, 2013
Publication Date
December 14, 2008
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: 2008 American Geophysical Union Meeting
Location: San Francisco, CA
Country: United States
Start Date: December 14, 2008
End Date: December 18, 2008
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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