The variability of the occurrence of the Field Aligned Irregularities in the middle-latitude F region using the VHF radar observation at Daejon, South Korea.

Seung Jun Oh1, Hyosub Kil2, Tae-yong Yang3, Young-Sil Kwak4 and Woo Kyoung Lee3, (1)SELab, Inc., Seoul, South Korea, (2)Johns Hopkins University, Baltimore, MD, United States, (3)Korea Astronomy and Space Science Institute, Daejeon, South Korea, (4)KASI Korea Astronomy and Space Science Institute, Daejeon, Korea, Republic of (South)