High-time resolution measurements of aurora and electromagnetic waves using ground-based observation network and satellites

2014 Fiscal Year Final Research Report

• Project/Area Number: 23403009
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Space and upper atmospheric physics
• Research Institution: Nagoya University
• Principal Investigator: SHIOKAWA Kazuo 名古屋大学, 太陽地球環境研究所, 教授 (80226092)
• Co-Investigator(Kenkyū-buntansha): MIYOSHI Yoshizumi 名古屋大学, 太陽地球環境研究所, 准教授 (10377781) ; OZAKI Mitunori 金沢大学, 電子情報学系, 准教授 (70422649) ; KATAOKA Ryuho 国立極地研究所, 宙空圏研究グループ, 准教授 (90462671) ; IEDA Akimasa 名古屋大学, 太陽地球環境研究所, 助教 (70362209)
• Co-Investigator(Renkei-kenkyūsha): EBIHARA Yusuke 京都大学, 生存圏研究所, 准教授 (80342616) ; YAGITANI Satoshi 金沢大学, 電子情報学系, 教授 (30251937)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: 磁気圏・電離圏 / 宇宙科学 / 超高層物理学 / 超高層大気環境 / 宇宙空間 / オーロラ / プラズマ波動

Outline of Final Research Achievements

In this study we have installed new loop antennas (100-kHz sampling) to measure VLF/ELF chorus waves and auroral cameras (30-100 Hz sampling) at subauroral latitudes in Canada since 17 February, 2012. These observations reveal several previously unknown features of VLF/ELF emissions and their relation to pulsating auroras at subauroral latitudes. Routine measurements of VLF/ELF and auroras have been carried out since then, and statistical features of VLF/ELF waves have been obtained at subauroral latitudes including their relation to local time, magnetic activity, and solar wind conditions. Comparisons with conjugate satellites in the magnetospheric equatorial plane are also on going.

Free Research Field

超高層大気物理学