Scintillations of the GPS, GLONASS, and Galileo signals at equatorial latitudeNikolai Hlubek, Jens Berdermann, Volker Wilken, Stefan Gewies, Norbert Jakowski, Mogese Wassaie and Baylie DamtieJ. Space Weather Space Clim., 4 (2014) A22DOI: https://doi.org/10.1051/swsc/2014020