Radio Astronomy in Japan INOUE, Makoto 井上　允 Space VLBI Project Office NAOJ

Observatories in Japan Several Radio Observatories in NAOJ Nobeyama Radio Observatory 45-m millimeter telescope (20-150 GHz) Nobeyama mm Array (5 x 10 m; 85-240 GHz) Nobeyama Solar Radio Observatory Nobeyama Radio Heliograph (84 x 80 cm; 17 & 34 GHz) VERA Observatory VLBI Array for Astrometry (4 x 20 m, dual beam; S & X bands, 22 & 43 GHz) Atacama Submillimeter Telescope Experiment (ASTE) with Universities in Chile

Radio Telescopes at NRO

Observatories in Japan (cont’d) Observatories/Facilities Mt. Fuji Submillimeter telescope Run by Univ. of Tokyo, 1.2 m, 350-800 GHz NANTEN at Las Campanas, Chile Run by Nagoya Univ., 4 m, CO at 115 GHz Array at Nasu Run by Waseda Univ., 5 x 20 m spherical, 1.4 GHz 34-m telescope at Kashima (CRL) S & X, 22 GHz 32-m telescope of Geographical Survey Institute (GSI) 64-m antenna/telescope of ISAS S & X, 5, 22 GHz 8-m in space; VLBI Space Observatory Program (VSOP)

ALMA We have the budget since this FY, and are about to participate in US-European ALMA We will have 4 x 12 m, and 12 x 6 m to the basic ALMA of 64 x 12 m Radio Astronomy group in Taiwan is planning to join in the Japanese group

ALMA Artist’s Impression Most Compact configuration. Baseline extendible up to 14 km

Japanese VLBI Stations at 22 & 43 GHz 苫小牧 水沢（２台） 野辺山 山口 鹿島 岐阜 入来 鹿児島 小笠原 石垣島

KVN-VERA Network 水沢 KVN VERA 入来 小笠原 石垣島 Operational at 22 and 43 GHz

VLBI Collaborations VERA + KVN collaboration mm VLBI experiments between Nobeyama, Daeduk, and Delingha VSOP-2 ground counterpart Discussion to form a VLBI consortium, and a data center in the East-Asia region

Issues to think about @East Asia mm-VLBI WS at Shanghai, Nov. 2003 How many observations? Organization/Coordination Exchange of information Exchange of staff/students Correlator(s)