The GIOVE-B satellite, is the second Galileo in-orbit validation element preparing the way for the deployment of the Galileo satellie system. It carries a radiation monitor known as SREM, designed by the Paul Scherrer Institute and built by Oerlikon Space, both in Switzerland.
The monitor has returned good quality data since launch. This figure shows the radiation levels encountered due to radiation belt high energy electrons as the satellite passes through the Earth's radiation belt. Each colour corresponds to a different electron energy level (approximately 0.5 MeV, 2MeV and 2.5MeV) and the horizontal axis being a magnetic field line label; the lowest L is when the satellite is at the equator and the highest is at its highest latitude.