[G03-3] Time-varying gravity field methods and solutions

[G03-3-02] Combination of monthly gravity field solutions – transition from an EGSIEM prototype service into an IAG service

^○Adrian Jaggi, Ulrich Meyer, Yoomin Jean, Daniel Arnold (University of Bern, Bern, Switzerland)

One of the main objectives of the project European Gravity Service for Improved Emergency Management (EGSIEM) is to establish a prototype service to combine monthly gravity field solutions from the current GRACE and the future GRACE-FO mission in order to deliver improved gravity field solutions for applications in Earth and environmental science research. Five analysis centers are currently contributing to these prototype service activities, where combinations on the solution level and more rigorous combinations on the normal equation level are performed. We report on the current achievements and the transition from the prototype phase into regular service operation under the umbrella of IAG's International Gravity Field Service (IGFS), which will ensure continuation beyond the EGSIEM project ending after three years of funding by the end of 2017.