Japan Geoscience Union Meeting 2015

Presentation information

International Session (Oral)

Symbol P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM09] Dynamics in magnetosphere and ionosphere

Wed. May 27, 2015 11:00 AM - 12:45 PM 302 (3F)

Convener:*Shin'ya Nakano(The Institute of Statistical Mathematics), Yoshizumi Miyoshi(Solar-Terrestrial Environement Laboratory, Nagoya University), Hiroshi Hasegawa(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Yoshimasa Tanaka(National Institute of Polar Research), Tomoaki Hori(Nagoya University Solar Terrestrial Environment Laboratory Geospace Research Center), Chair:Yoshizumi Miyoshi(Solar-Terrestrial Environement Laboratory, Nagoya University)

11:45 AM - 12:00 PM

[PEM09-04] Towards quantification of auroral properties based on image data with high temporal resolution

*Shin'ya NAKANO1, Yasunobu OGAWA2 (1.The Institute of Statistical Mathematics, 2.National Institute of Polar Research)

Keywords:aurora, magnetospheric convection, pulsating aurora

We are developing a technique to extract various information from aurora image data with temporal resolution of 1 second. The variations of aurora can be decomposed into a persistent component and residual fluctuations. We thus aim at quantifying various auroral properties by analyzing each of the components. For example, the motion of the persistent component would provide the information on the convection electric field. The properties of the convection can thus be obtained using optical flow analysis of this component. On the other hand, the residual fluctuations are mainly attributed to pulsating aurorae. It could therefore be possible to obtain the information on the frequency and amplitude of a pulsating aurora. We will report the current status and outlook.