Distributed ground-based optical observations of polar cap patches

Details Distributed ground-based optical observations of polar cap patches Distributed ground-based optical observations of polar cap patches

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm14a..02h&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM14A-02

Physics

[0310] Atmospheric Composition And Structure / Airglow And Aurora, [2439] Ionosphere / Ionospheric Irregularities, [2475] Ionosphere / Polar Cap Ionosphere, [2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions

Scientific paper

All-sky imagers at Ny-Ålesund (NYA: 76.5N MLAT), Svalbard; Station Nord (NRD: 81.2N MLAT) and Qaanaaq (NAQ: 85.1N MLAT), Greenland; and Resolute Bay (RES: 83.0N MLAT), Canada; observed nearly 8 hours of continuous λ630.0 nm airglow patch activity in the central and nightside polar cap on December 10-11 2007, during solar minimum conditions. When assuming an emission altitude of ~250 km, the optical fields of view of the imagers slightly overlap, permitting the registration of individual patches between instruments. The spatio-temporal evolution of a train of patches was observed from near the geomagnetic pole into the nightside auroral oval equatorward of NYA, approximately 2000 km distant. Overlapping imager fields of view also permit studies of the triangulated patch altitude. Preliminary analysis shows significant variation of the altitude of successive patches. Correlation of patch airglow emissions with ground-based radio instrumentation, including digisonde, GPS TEC, and incoherent scatter radar, are discussed.

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