VHF coherent scatter radar observations of mid-latitude F-region field-aligned irregularities over South Korea

Details VHF coherent scatter radar observations of mid-latitude F-region field-aligned irregularities over South Korea VHF coherent scatter radar observations of mid-latitude F-region field-aligned irregularities over South Korea

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa43a1888k&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SA43A-1888

Physics

[2439] Ionosphere / Ionospheric Irregularities, [2443] Ionosphere / Midlatitude Ionosphere

Scientific paper

We examine the mid-latitude F-region field-aligned irregularity (FAI) activity during 2010-2011 by using the VHF coherent scatter radar data in Daejeon (36.2°N, 127.1°E; dip latitude 26.7°N), South Korea. The VHF radar has been operated since December 2009 and provides a unique opportunity to investigate the variability of the FAI activity with local time, season, solar flux, and magnetic activity. Our preliminary results during the solar minimum show that FAIs preferentially occur at post-sunset and pre-sunrise and during the June solstice. The seasonal variation of the FAI occurrence frequency is similar to that of the electron density irregularities observed by the C/NOFS satellite. For one event, we observed the association of the FAIs with a medium-scale traveling ionospheric disturbance (MSTID). Our study extends to the investigation of the correlations between the irregularities in the equatorial region and middle latitudes and between the conjugate F regions, and the causal linkage of the FAIs with the E-region perturbations. For this purpose, we analyze the VHF radar and C/NOFS data during 2010-2011.

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