GPS signal fades at the L1 and L2 frequencies measured by three different IGS stations during the main burst of Event 03. To facilitate the comparison, the stations were selected for having similar signal fades at GPS L2. The fades at L1 were, however, different, proving that the relative impact at L1 and L2 does not only depend on the spectral properties of the bursts but also on the station used. From left to right their receivers are Ashtech UZ-12, Leica GRX1200GGPro and Trimble NetR8.