Study of spacecraft-plasma environment by unstructured-grid particle simulation

The geospace environment simulator (GES) began as one of the advanced computing research projects at the Earth Simulator Center in the Japan Marine Science and Technology Center in 2002. By using this computing resource, a large scale simulation which reproduces a realistic physical model can be utilized not only for studying the geospace environment but also for various human activities in space. The ES project aims to reproduce a fully kinetic environment around a satellite by using the 3D full-particle electromagnetic (FPEM) simulation code which includes the spacecraft model inside it. Spacecraft can be modeled by the unstructured-grid 3D FPEM code. We report the current status of porting our simulation codes onto the ES and our concept of achieving the satellite environment in conjunction with the space weather.