摘要
November 21-22,2011,Johannesburg,South Africa The fourth annual workshop of the International Geoscience Programme Project 565“Developing the Global Geodetic Observing System into a Monitoring System for the Global Water Cycle,”which was jointly organized by IGCP 565,the Group on Earth Observations(GEO)and the Global Geodetic Observing System(GGOS),was held on November 21-22,2011 at the Witwatersrand University,Johannesburg,South Africa.
