Invited by State Key Laboratory of Geodesy and Earth’s Dynamics (SKLGED), Dr. Chen Qiang from University of Luxembourg visited Institute of Geodesy and Geophysics(IGG) and gave an academic report on title “Validation of the EGSIEM GRACE gravity fields and the latest achievements from the EGSIEM project” on May 14.
The report introduced the research progress of the European EGSIEM (European Gravity Service for Improved Emergency Management) program in detail. EGSIEM is an important part of the European "Horizon 2020" program. It has launched a gravity field service for emergency management through a joint European university and research institute. Through this program, the researchers analyzed the optimal time-varying gravity field model by combining several GRACE gravity field products in Europe, and by comparing with GPS and ocean-bottom pressure observations, the accuracy of the fusion-gravity field product was verified. In addition to the conventional monthly time-varying gravity field modeling, by processing near-real-time GRACE observation data, the EGSIEM project also analyzes the daily time-varying gravity field model, and obtains a global gravity index based on gravity satellites, which successfully used to detect the Flood event in Ganges region. The related products have been successfully applied to European hydrological forecasting analysis and have achieved good effect. During the discussion session, participants discussed in depth the load deformation comparison between GPS and GRACE and the accuracy evaluation of the integrated gravity field products, and exchanged opinions on the development of relevant cooperation research.
Dr. Chen received a bachelor's degree from Wuhan University in 2007, a master's degree from Wuhan University in 2009, a doctorate from Stuttgart University in 2015, and a postdoctoral research at the University of Luxembourg since 2015. He is mainly engaged in the geodetic monitoring and time-varying gravity field analysis of surface load deformation.

                                                                        Dr. Chen was giving his report.