Strategic Funds for the Promotion of Science and Technology by MEXT (Promotion of International Joint Research) Research Enhancement and System Establishment for Space Weather in Indonesia Mamoru Yamamoto, RISH, Kyoto University Yuichi Otsuka, STEL, Nagoya University Tsutomu Nagatsuma and Takuya Tsugawa, NICT Sri Kaloka Prabotosari, LAPAN, Indonesia
1.  “Regional” studies are important even for space weather. 2.  Japan-Indonesia 3-year collaborative research project “Indonesia Space Weather” started in 2010, based on our long-time collaboration and strong interest from Indonesia (LAPAN) side. 3.   Equatorial Atmosphere Radar (EAR) is the major facility of the project. EAR continues long-term “Atmosphere” observations, but is shifted to more “lonosphere” observstions since July 2010. 4. EAR site is equipped with many supporting instruments. 5. SEALION of NICT, OMTI of STEL, and beacon-receivers of RISH help the project by giving horizontally wide-coverage data. lonosphere is the height range
Space weather is a program to observe, assess, and forecast the space environment, which is very important for constant operation of satellite systems and reliable communication / navigation purposes. Not only the study of the Sun-to-Earth system, but also studies of vertical coupling of the atmosphere / ionosphere is important. Regional observations (especially in the low latitudes) are thus necessary. Satellite signal is scintillated by the disturbance of the ionosphere. Noisy data transform from meteorological satellites only occurs over Asia.
Research Enhancement and System Establishment for Space Weather in Indonesia The collaborative project is funded in FY2010-2012 to promote space weather study in Indonesia by providing long-term and high-quality data of the region from the EAR and related facilities. Hold yearly workshop for space weather in Indonesia. Network for satellite beacon experiment Development of observation database Yearly workshop for space weather in Indonesia
LAPAN Sri Kaloka, Buldan Muslim, Afif Budiyono RISH, Kyoto Univ. Long-time collaboration for EAR Mamoru Yamamoto, Masayuki Yamamoto, Hiroyuki Hashiguchi STEL, Nagoya Univ. Yuichi Otsuka NiCT NICT lonosphere experiment in south- east Asian countries; SEALION etc. Tsutomu Nagatsuma, Takuya Tsugawa
※EAR: Equatorial Atmosphere Radar (located right at the geographic equator and in the geomagnetic southern hemisphere) dip equator
Antenna field (110m in diameter) Location: Kototabang, West Sumatra, Indonesia (0.20° S, 100.32° E) 100 kW, 560 Yagi antennas
EAR continues long- period continuous observations since June 2001. Most of them were for wind measurement of the troposphere and stratosphere. From July 2010, we shift the observation mode to more ionosphere studies owing to the current research program of “Indonesia Space Weather" Continuous ionosphere measurement started in July 2010

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SEALION  (by NICT)
–  Southeast Asia Equatorial lonospheric Network –  Network of FM-CW ionosondes NICT = National Institute of Information and Communications Technology •   lonosonde sites –  Kototabang (=EAR site) –  Chumphon (Thailand) (close to the geomagnetic equator) –  Chiang Mai (Thailand) (B-field conjugate to the EAR site) –  Phu Thuy (Vietnam) –  Bac Lieu (Vietnam) EAR site ⭐ SEALION ionosonde
OPTICAL INSTRUMENTS Chiang Mai Airglow imager (NICT) F-P Interferometer  (STEL) Kototabang Airglow imager (STEL) F-P Interferometer (STEL) Other RADARS Kototabang 30MHz FAI Radar (STEL) Meteor radar (RISH) EAR site ⭐ SEALION ionosonde
Japan (FUT) ①Fukui, ②Shigaraki, ③Uji, ④Shionomisaki Indonesia (LAPAN) ⑤Kototabang, ⑥Pontianak, ⑦Manado, ⑧Bandung Thailand (KMITL/NICT) ⑨Phuket, ⑩Ciang Mai Vietnam (HGI/SRI) ①Bac Lieu, ②Ho Chi Minh, ①Nhatrang, ①Phu Thuy Pacific (SRI) ßKosrae, ßKwajalein Africa (local univ./AFRL) ①Nairobi, ①Bahir Dar On schedule / Planned Biak, Hue, Tirunelveli / Cebu
1.  “Regional” studies are important even for space weather. 2.  Japan-Indonesia 3-year collaborative research project “Indonesia Space Weather” started in 2010, based on our long-time collaboration and strong interest from Indonesia (LAPAN) side. 3.   Equatorial Atmosphere Radar (EAR) is the major facility of the project. EAR continues long-term “Atmosphere” observations, but is shifted to more “lonosphere” observstions since July 2010. 4. EAR site is equipped with many supporting instruments. 5. SEALION of NICT, OMTI of STEL, and beacon-receivers of RISH help the project by giving horizontally wide-coverage data.