1. Unmatched accuracy; 2. Combines GPS L1, L2 and L2C with GLONASS as an optional upgrade; ... to adapt and grow as your business needs change. Supporting GPS L1, L2, and L2C signals, the Trimble R6 can be ... • Proven Trimble low elevation tracking technology• Satellite signals tracked simultaneously: − GPS: L1 C/A, L2C, L2E (Trimble method for tracking L2P ...