Computer Science – Sound
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981georl...8..125w&link_type=abstract
Geophysical Research Letters, vol. 8, Jan. 1981, p. 125-128. Research supported by the U.S. Defense Nuclear Agency;
Computer Science
Sound
43
Auroras, Electron Precipitation, F Region, Ionospheric Sounding, Polar Caps, Satellite Observation, All Sky Photography, Electron Flux Density, Ionosondes, Ionospheric Electron Density, Meteorological Satellites
Scientific paper
Polar cap auroras were measured at Thule Air Base, Greenland in December 1979, using an all sky imaging photometer. These images combined with digital ionosonde measurements, show the orientation, structure, and drift motion of sun-aligned, F layer auroras. Drifts in both the dawn-to-dusk and dusk-to-dawn direction were observed. These auroras were not visible on the all sky camera films; however, coincident Defense Meteorological Satellite Program (DMSP) precipitating electron measurements show that these arcs are produced by fluxes of low energy (E less than 500 ev) electrons. Simultaneous satellite-to-ground signal amplitude measurements show that these auroras are accompanied by km scale size ionospheric irregularities, which cause strong amplitude fluctuations (scintillation) on the received satellite signal.
Büchau Jurgen
Weber Edmund J.
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