Physics
Scientific paper
Nov 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983georl..10.1112k&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 10, Nov. 1983, p. 1112-1115.
Physics
30
Auroral Zones, F Region, Incoherent Scatter Radar, Ionospheric Electron Density, Auroral Ionization, Electron Energy
Scientific paper
Operation of an incoherent-scatter radar at Sondre Stromfjord, Greenland, began in early February 1983, marking the begining of a new effort in ground-based ionospheric research in the vicinity of the polar cusp and polar cap. The Sondrestrom Radar is located north of the arctic circle on the west coast of Greenland near the Sondrestrom Air Base at an invariant latitude of 75 deg. The effects of the polar cusp may frequently be observed at local noon: the radar-measured signature in the F region is an increase of more than a factor of two in electron density. Additionally, the daytime variations in the F-sub-1-region electron density are dramatic. In contrast to auroral zone measurements, enhanced electron density at 150-km altitude has been observed, and a marked absence of detectable E-region ionization at night has also been noticed.
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