Morphology of Omega band aurora observed by THEMIS all-sky imagers

Natsuo Sato1, Akira S Yukimatu1, Yoshimasa Tanaka2 and Tomoaki Hori3, (1)NIPR National Institute of Polar Research, Tokyo, Japan, (2)NIPR National Institute of Polar Research, Tachikawa, Tokyo, Japan, (3)Nagoya University, Institute for Space-Earth Environment Research, Nagoya, Japan