Multiple beam observations of mid-latitude ionospheric disturbances by the MU RADAR

Takami [Tomoyuki] ; Fukao [Shoichiro] ; Oliver [W.L.] ; Kato [Susumu] ; Tsuda [Toshitaka] ; Sato [Toru] ; Yamanaka [Manabu D.] ; Yamamoto [Marmoru] ; Nakamura [Takuji]