The TCA920 is a 2D choke-ring GNSS antenna built for base stations and CORS reference setups, tracking GPS, GLONASS, BDS, Galileo, QZSS, SBAS and IRNSS across multiple frequency bands. Its choke-ring design and multipath-suppression technology give it high phase-center stability for millimeter-level positioning accuracy, while an IP67 rating suits it for outdoor land and marine survey use. It measures roughly 322mm in diameter and weighs about 5.6kg.