MAGDAS project and its application for space weather

Abstract. We introduce a real-time MAGnetic Data Acquisition System of Circum-pan Pacific Magnetometer Network, i.e. MAGDAS/CPMN for space weather study and application, and its preliminary results. By using this system, we will conduct real-time monitoring and modeling of (1) global 3-dimensional current system, (2) plasma mass density, and (3) penetrating process of polar electric fields into the equatorial ionosphere, in order to understand electromagnetic and plasma environment changes in the geospace during the period of ILWS/CAWSES/IHY. Index Terms. Space weather, MAGDAS, electromagnetic and plasma environment, geospace