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It is well known that satellite communications systems are effective and essential communication infrastructure for disaster relief. NICT sent researchers to Tsunami stricken area in March right after the Great East Japan Earthquake and provided broadband satellite communications link to support rescue activities. Through this experience, we learned many kinds of requirements of communications for such purposes. In this paper, we list up the requirements and report what kind of satellite communications technologies are needed, and research and development issues. key words: disaster relief, satellite communications, broadband, mobile communications, channelizer

Research and Development Issues of Satellite Communications Systems for Large Scale Disaster Relief