Simultaneous multispectral imaging of the discrete aurora

Details Simultaneous multispectral imaging of the discrete aurora Simultaneous multispectral imaging of the discrete aurora

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jastp..63.1981s&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 63, Issue 18, p. 1981-1992.

Physics

16

Scientific paper

A unique multispectral imager and an associated multispectral analysis framework are described which together constitute a new diagnostic tool for auroral research. By acquiring spatial and spectral data simultaneously, multispectral imaging allows one to exploit physical connections between auroral morphology and the auroral optical spectrum in a way that sequential spectral imaging cannot. The initial research focus is on imaging the transition in the incident energy spectrum during the formation of discrete arcs-that is, when the precipitating population is characterized by <1keV electrons. A technique is presented which uses two spectral bands (centered at 4278 and 7325Å) to extend the effective dynamic range of passive imaging to much lower energies.

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