Scintillations of the GPS, GLONASS, and Galileo signals at equatorial latitude Nikolai Hlubek, Jens Berdermann, Volker Wilken, Stefan Gewies, Norbert Jakowski, Mogese Wassaie and Baylie Damtie J. Space Weather Space Clim., 4 (2014) A22 Published online: 01 August 2014 DOI: 10.1051/swsc/2014020