Germany / France / Japan / United States / United Kingdom / /
Facility
Greenwich Observatory / Y station / National Institute of Information / Tokyo observatory / X station / /
Holiday
Vernal Equinox Day / /
IndustryTerm
optical frequency standard technologies / technology using light / navigation satellite systems / frequency transfer method using communications satellites / coordinate systems / stable solution / satellite orbit / satellite laser ranging / terrestrial reference frame systems / measurement technologies / satellite time / artificial satellite / satellite positioning / satellite missions / main observation technology / /
MusicGroup
B / VLBI2010 / /
Organization
National Institute of Information / PTB / International Earth Rotation and Reference Systems Service / International VLBI Service for Geodesy and Astrometry / International Association of Geodesy / International Astronomical Union / Kashima Space Research Center / Consultative Committee for Time and Frequency / NICT / International Union of Geodesy and Geophysics / Central Bureau / Palestine Liberation Organization / /
4-4 Role of VLBI Technology in the Space-Time Standards KOYAMA Yasuhiro In the VLBI observations, signals from Quasars which are realizing the current Celestial Reference Frame are directly used, and therefore all of the