The GPS-713-GGG-N is a GNSS antenna which receives L1, L2, L5 GPS L1, L2, L3 GLONASS B1, B2 BeiDou and E1, E5a/b Galileo signals. This antenna can be used for GPS only, dual or tripple constellation applications, resulting in increased flexibility and reduced equipment costs. It provides enhanced Inmarsat interference rejection, which allows tracking of GNSS signals in the presence of high powered Inmarsat transmitters - found on marine vessels. The antenna has a highly stable phase centre as the azimuth and elevation angle of the satellites change.