A large observation network with the SuperDARN radars and other ground-based instruments at manned and unmanned stations is currently developed in the Antarctic area from sub-auroral latitudes to polar cap region and from nightside to dayside hours under international collaboration. Such a wide-spread circumpolar observation network is very unique and powerful for studies on the phenomena which occur due to the Sun-Earth interaction, e.g., direct entry of solar wind energy and momentum into the cusp and polar cap regions, explosive energy dissipation during substorm-time, highly energetic particle precipitation into the atmosphere during storm-time. In the coming phase IX of the Japanese Antarctic Research project, coordinated observations with several magnetospheric satellite projects, e.g., MMS (Magnetospheric Multiscale Mission), ERG (Energization and Radiation in Geospace), etc., can be expected