3:45 PM - 4:00 PM
*Toru Takahashi1, Ilkka I. Virtanen2, Keisuke Hosokawa3, Yasunobu Ogawa1,4, Anita Aikio2, Hiroshi Miyaoka1,4, Antti Kero5 (1.National Institute of Polar Research, 2.Ionospheric Physics research unit, University of Oulu, 3.Department of Communication Engineering and Informatics, University of Electro-communications, 4.Department of CommGraduate University for Advanced Studies, SOKENDAIunication Engineering and Informatics, University of Electro-communications, 5.Sodankylä Geophysical Observatory, University of Oulu)