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The 3rd ERG Mission Science Workshop
September 5-8, 2017
ASIAA, Taipei / NCKU, Tainan

Oral Presentation

The PWING project: Geospace ground-based network observations for the ERG mission

Satoshi Kurita, Kazuo Shiokawa, and PWING project team

The plasmas in the inner magnetosphere have wide energy ranges from electron volts to Mega-electron volts. These plasmas (electrons and ions) rotate around the earth longitudinally due to gradient and curvature of geomagnetic field and interact with ULF/ELF/VLF waves at frequencies of 0.1 Hz to 10 kHz to cause their energization in the equatorial plane of the magnetosphere and loss into the ionosphere. The PWING Project (study of dynamical variation of Particles and Waves in the INner magnetosphere using Ground-based network observations, http://www.isee.nagoya-u.ac.jp/dimr/PWING/) has been stated since April 2016, as a Grant-in- Aid for Specially Promoted Research of the Japan Society for the Promotion of Science (JSPS), in order to provide global distribution and quantitative evaluation of the dynamical variation of plasmas and waves in the inner magnetosphere. We operate all-sky cooled-CCD imagers, 64-Hz sampling induction magnetometers, 40-kHz sampling ELF/VLF receivers, and 64-Hz sampling riometers at 8 stations at at subauroral latitudes (~60 MLAT) around the geomagnetic north pole, as well as two EMCCD cameras at two stations. The stations are distributed in Canada, Iceland, Finland, Russia, and Alaska. We combine these longitudinal network observations with the ERG (Arase) satellite, which was launched on December 20, 2016, and global modeling. Using these comprehensive dataset, we investigate dynamical variation of particles and waves in the inner magnetosphere, which is one of the most important research topics in recent space physics. The first campaign observation of PWING project with the ERG satellite was conducted in March 21-April 2017. In this presentation, we show current status of these instruments of the PWING project and preliminary results obtained from the first ERG-ground campaign.