Top Groups Global Activities Facilities Links Access NICT >Applied Electromagnetic Research Institute >Space-Time Standards Laboratory Four Groups of Space-Time Standards Laboratory have conducted research and development. Japan Standard Time Group Japan Standard Time Group is responsible for generating and keeping JST based on UTC(NICT), comparing UTC(NICT) using international time-transfer link, disseminating the standard time and frequency called JJY, and providing useful information and data on time related business applications and solutions. Atomic Frequency Standards Group We are conducting research to develop atomic clocks with ultra-high accuracy, aiming for the establishment of accurate standard of time and frequency. Space-Time Measurement Group Space-time Measurement Group conducts research and development on space and time measurement technologies using radio and optical waves. Satellite Time Management Group We are developing the time management system for the quasi zenith satellite system (QZSS), and also carrying out precise time and frequency comparison experiments between a clock on a satellite and the clocks on the ground using ETS-VIII (engineering test satellite 8). Links International Organizations AGU (American Geophysical Union)　 APMP (Asia Pacific Metrology Programme) BIPM (Bureau International des Poids et Mesures) CCTF ( Consultative Committee for Time and Frequency) EFTF (European Frequency and Time Forum) EGU (European Geosciences Union) IAG (International Association of Geodesy) IAU (International Astronomical Union) ICAP (International Conference on Atomic Physics) IERS (International Earth Rotation and Reference Systems Service) 　 IERS Rapid Service/Prediction Center for Earth Orientation Parameters(USA) IGS (International GNSS Service) ILRS (International Lazer Ranging Service) ION (Intitute of Navigation) ITU (International Telecommunication Union) IUGG (International Union of Geodesy and Geophysics) IVS (International VLBI Service for Geodesy & Astrometry) URSI (Union Radio-Scientifique Internationale) Japanese Organizations ASJ (The Astronomical Society of Japan) The Geodetic Society of Japan HIJ (The Horological Institute of Japan) IEE (The Institute of Electrical Engineers of Japan) IEICE (The Institute of Electronics, Information and Communication Engineers) IPSJ (Information Processing Society of Japan) JADAC (Japan Data Communications Association)(Janaese only) Japan Geoscience Union JAXA (Japan Aerospace Exploration Agency) JIN (Japan Institute of Navigation) JPS (The Physical Society of Japan) JSAP (the Japan Society of Applied Physics) mic (Ministry of Internal Affairs and Communications) SGEPSS (Society of Geomagnetism and Earth, Planetary and Space Sciences) SPAC (Satellite Positioning Research and Application Center) TBF (TBF Time Business Forum)(Japanese only) Time-Stamping Service Accreditation Center Joint Research Institutes　　　　 Ajou University Geographical Survey Institute Gifu University(Japanese only) Hokkaido University(Japanese only) JAXA Institute of Space and Astronautical Science 　　　　 Kagoshima University(Japanese only) 　　　　 Kochi National College of Technology Dep. of Electrical Engineering and Information Science(Japanese only) Kyoto University 　　　　 National Astronomical Observatory of Japan Mizusawa Vera Observatory National Astronomical Observatory of Japan TAMA Project Office 　　　　 Nippon GPS Solutions Corporation Tokyo Metropolitan University Electronic System Engineering Laboratory Tohoku University Planetary Plasma and Atmospheric Research Center　　　 　 University of Electro-Communications Institute for Laser Science(ILS) University of Tokyo Tsubono Group University of Tsukuba Graduate School of Pure and Applied Sciences(Japanese only) Yamaguchi University(Japanese only) 　　　　 Other Research Institutes 　   Abroad BSTI (Bangladesh Standards and Testing Institution) ITDI (Industrial Technology Development Institute) (The Philippines) Puslit KIM-LIPI (Research Center for Calibration, Instrumentation and Metrology-Indonesian Institute of Sciences) KRISS (Korea Research Institute of Standards and Science) Ministry of Commerce, Industry, Trade and Public Enterprises（Fiji） MASM (Mongolian Agency for Standardization and Metrology) MSL (Measurement Standards Laboratory)(New Zealand) NBSM (Nepal Bureau of Standards and Metrology) NIM (National Institute of Metrology)(P.R. China) NIMT (National Institute of Metrology)(Thailand) 　　　 NISIT (National Institute of Standards and Industrial Technology)(Papua New Guinea) NIST (National Institute of Standards and Technology)(USA) NMC/A*STAR (National Metrology Centre/Agency for Science, Technology and Research)(Singapore) NMIA (National Measurement Institute of Australia) NML-SIRIM (Standards and Industrial Research Institute of Malaysia　Berhad) NPL (National Physical Laboratory)(U.K.) NPLI (National Physical Laboratory)(India) NTSC (National Time Service Center)(P.R. China) OP (Observatoire de Paris) PTB (Physikalisch-Technische Bundesanstalt STAMEQ)(Germany) TL (Telecommunication Laboratories)(Taiwan) USNO (U.S. Naval Observatory) VMI-STAMEQ (Vietnam Metrology Institute, Directorate for Standards and Quality)    In Japan AIST (Advanced Industrial Science and Technology) ENRI (Electronic Navigation Research Institute) NAOJ (National Astronomical Observatory)