11:40–11:50 | EGU23-10853 | Virtual presentation | , Deniz Cetin, and S Sermet Ogutcu Determining the accuracy of position and velocity using GNSS is now on the agenda of the research community. Each unique system in the GNSS puts effort to complete its constellation of satellites, with orbits and clocks of ever-increasing quality. In order to interpret the quality of the results, we started the IGS MGEX experiment, where we, as end users, used the network and its data for evaluation.