Japan Geoscience Union Meeting 2015

Presentation information


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

[P-EM28] Dynamics in magnetosphere and ionosphere

Thu. May 28, 2015 4:15 PM - 6:00 PM 302 (3F)

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

5:30 PM - 5:45 PM

[PEM28-16] Topside sounding of upper ionosphere by EXOS-D/PWS in 2015

*Yuto KATOH1, Atsushi KUMAMOTO1 (1.Graduate School of Science, Tohoku University)

Keywords:topside sounding, upper ionosphere

We present initial results of sounder experiments by the Akebono (EXOS-D) satellite conducted in March-April 2015.
Plasma wave sounder experiments have been conducted by Stimulated Plasma Wave experiment (SPW) subsystem of Plasma Wave and Sounder experiments (PWS) on board the Akebono satellite in the topside ionosphere and plasmasphere [Oya et al., JGG 1990]. The sounder experiments have two main purposes: One is the remote sensing of the topside ionosphere including polar region and inner plasmasphere, and another is active experiments by the stimulation of plasma waves in space. Both of them have been successfully conducted by the SPW subsystem of Akebono/PWS.
During March-April 2015, we carry out sounder experiments by the Akebono satellite in both polar region and equatorial region of ionosphere/plasmasphere. In this paper we study echoes obtained by the experiments and derived altitude profile of the plasma density of the topside ionosphere. We also investigate plasma resonances appeared in ionograms and discuss their generation mechanism based on the weak turbulence theory of the sequence of diffuse plasma resonances [e.g., Oya, 1970].