Horizontal structures of ionized Helium in the topside ionosphere of dusk side observed by ISS-IMAP/EUVI

Yuta HOZUMI; Akinori SAITO; Atsushi YAMAZAKI; Go MURAKAMI; Ichiro YOSHIKAWA

Presentation information

Oral

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

[P-EM36_28PM1] Physics and Chemistry in the Atmosphere and Ionosphere

Mon. Apr 28, 2014 2:15 PM - 4:00 PM 312 (3F)

Convener:*Yuichi Otsuka(Solar-Terrestrial Environment Laboratory, Nagoya University), Takuya Tsugawa(National Institute of Information and Communications Technology), Seiji Kawamura(National Institute of Information and Communications Technology), Chair:Tatsuhiro Yokoyama(National Institute of Information and Communications Technology), Mitsuru Matsumura(Center for Space Science and Radio Engineering, University of Electro-Communications)

3:00 PM - 3:15 PM

[PEM36-18] Horizontal structures of ionized Helium in the topside ionosphere of dusk side observed by ISS-IMAP/EUVI

*Yuta HOZUMI¹, Akinori SAITO¹, Atsushi YAMAZAKI², Go MURAKAMI², Ichiro YOSHIKAWA³ (1.Department of Geophysics, Graduate School of Science, Kyoto University, 2.Institute of Space and Astronautical Science / Japan Aerospace Exploration Agency, 3.The University of Tokyo)

Keywords:Topside ionosphere, ISS-IMAP, Ionoized Helium

Horizontal structures of ionized Helium in the topside ionosphere of dusk side were obtained with the Extreme Ultra Violet Imager (EUVI) of the ISS-IMAP (Ionosphere, Mesosphere, upper Atmosphere and Plasmasphere mapping) mission. EUVI has taken image of He He II radiation (30.4 nm) from the International Space Station (ISS) since October 2012. In this work, images taken in 2013 were analyzed. North-south asymmetry and longitudinal structure of ionized Helium were found. Seasonal dependence of these horizontal structures will be discussed.