The AT500 is a high performance choke ring antenna that can track GPS L1, L2C, L2P, L5, GLONASS L1, L2, BeiDou B1, B2, B3, Galileo E1, E5a/E5b, AltBoc, L-Band and SBAS. It is specially designed for deformation monitoring, CORS, and related GNSS infrastructure networks