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< About the first Event > (Theme) Interactive "astronomy class" using the optical network (Purpose) By allowing the participants to attend a lecture in a leading-edge academic field from the comfort of a nearby site, this event aims at enabling them to experience the potential of the high-speed, broadband and interactive characteristics of the optical networks. (Method) Using high-quality IP video transmission technology*1 based on the advanced Internet technology developed at NTT Information Sharing Platform Laboratories, and the optical network, a lecture on radio astronomy given at the NTT Musashino R&D Center will be transmitted to the SHARP Ichigaya Showroom and the DNP Ginza Building in early July. The audiences will be applicants from the registered members of "The Ginza School"*2 run by DNP. An interactive Q and A session will be held between the three locations. The lecture at the NTT Musashino R&D Center includes the demonstration of the analysis of celestial signals actually received by the large-scale antenna at the Kashima Space Communication Center, which will be made available through the radio astronomy observations and precise measurement experiments*3 conducted in cooperation with Communications Research Laboratory and the National Astronomical Observatory of Japan.

< Glossary > *1 High-quality IP image transmission using wide-area video synchronization technology, UniSync A method of transmitting studio-material-quality video signals while maintaining exact synchronization over the asynchronous IP network, by combining video signals transmitted over the IP network with the wide-area synchronization reference signals extracted from the ISDN. This method allows multiple video signals to be transmitted, reproduced, and switched in perfect synchronization, making it possible apply it to future multi-angle broadcasting. *2 The Ginza School This is a talk show, started in April 1995 by DNP, to propose the best way of "communication". Held every other month, the show takes up everyday life issues to think about the essence and meaning of communication, with emphasis on enjoying thinking. Lecturers are invited from various fields. There are currently approximately seven thousand members. Records of the talk shows are available in booklets (free) and videos (chargeable). There are also other events, such as field trips and year-end parties. *3 Research into VLBI astronomy using super-high-speed digital circuits and into super-high-speed IP communication technology This is a joint research project on super-high-speed network applications, which has been carried out since 1995 by NTT Information Sharing Platform Laboratories, Communications Research Laboratory and the National Astronomical Observatory of the Ministry of Japan. In this research, Very Long Baseline Interferometers, which have so far been based on magnetic tapes, are constructed into a real-time system by using a super-high-speed network to realize ultra-precise geodetic systems and radio telescopes with ultra-high resolution. Projects which are currently being conducted simultaneously are the KSP Project, involving the continuous observation of crustal movement aimed at earthquake prediction for the Kanto area, and the GALAXY project, aimed at the high-resolution observation of faint radio bodies.

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