EISCAT observation of gravity wave modulations at the commencement of local geomagnetic disturbance in the polar mesosphere

Young-Sook Lee, Chungnam National University, Daejeon, Korea, Republic of (South), Kim Kyung-Chan, Daegu University, Gyeongsan, Korea, Republic of (South) and Yongha Kim, Chungnam National University, Daejeon, South Korea