Articles | Volume 14, issue 12
Ann. Geophys., 14, 1454–1461, 1996
https://doi.org/10.1007/s00585-996-1454-z

Special issue: VIIIe EISCAT

Ann. Geophys., 14, 1454–1461, 1996
https://doi.org/10.1007/s00585-996-1454-z

  31 Dec 1996

31 Dec 1996

Radar observations of ionospheric irregularities at Syowa Station, Antarctica: a brief overview

T. Ogawa T. Ogawa
  • Solar-Terrestrial Environment Laboratory, Nagoya University, 3-13 Honohara, Toyokawa, Aichi 442, Japanl

Abstract. We briefly overview the radar observations that have been made for 30 years at Syowa Station, Antarctica for studying small-scale electron-density irregularities in the southern high-latitude E- and F-region ionosphere. Some observational results (i.e., long-term variations of radio aurora, Doppler spectra with narrow spectral widths and low Doppler velocities, and simultaneous observations of radar and optical auroras) from VHF radars capable of detecting 1.3- to 3-m scale irregularities are presented. A new 50-MHz radar system equipped with phased-antenna arrays began operation in February 1995 to observe two-dimensional behaviours of E-region irregularities. An HF radar experiment also began in February 1995 to explore decameter-scale E- and F-region irregularities in the auroral zone and polar cap. These two radars will contribute to a better understanding of the ionospheric irregularities and ionospheric physics at southern high latitudes.

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