Stanford University Singapore
Germany
National Time Service Center (NTSC)
Chang‘an university ChengDu,SiChuan Province
Hong Kong Polytechnic University/University of California, Berkeley Hung Hom, Kwolon, Hong Kong/CA, USA
Curtin University Australia
University of California, Riverside Irvine
Japan
GEODNET San Jose, CA
Swarms Palo Alto
UK Centre for Ecology & Hydrology Oxfordshire
Zushi, Kanagawa, Japan
European Union
La Plata, Argentina