In recent years, satellite communications system operators have been planning and deployinghigh-throughput satellite (HTS) systems.However, due to the long lifetime of the satellite (about fifteen years in Geostationary orbit),the demands in terms of capacity, service area, and application change during its lifetime.Thus, next-generation HTS will need to enhance flexibility to accommodate these changingdemands.Flexible bandwidth per beam and/or flexible beam coverage will be the way to realize moreefficient spectrum utilization.
We are developing high-precision orbit determination technologies for low earth orbiters with laser communication equipment using 35cm-optical telescopes and GPS signals.
The spread of Internet and broadband networking environment have enriched our lives with things like e-mail, online shopping and music and video downloads. However, the Internet is not yet available in every home and location. There are still many places and situations where the Internet cannot be accessed, such as remote areas and island and during time of disaster. The WINDS Project is conducting research on next-generation high-speed communication satellite equipped with high-speed transmission and wide area network capabilities. The focus is on the Asia-Pacific region and involves high-speed, large capacity two-way communication using dish antennas which can be installed for use in household. The aim of this research is to achieve a more convenient and equitable information society in which the Internet can be used by all people at anytime no matter where they are.
Space-time information is an indispensable element for society and it defines the basic physical parameters of science. We aim at the realization of an infrastructure from which anyone can obtain accurate and specific space-time information.