The TCA930 is a 3D structural choke ring GNSS antenna built for CORS and RTK reference stations, using a multipath-resistant choke plate design to reduce signal reflection errors and maintain a stable phase center. It supports full-frequency reception across GPS, GLONASS, BDS, Galileo, QZSS, SBAS and IRNSS, and has an IP67-rated, UV-resistant waterproof housing suited for continuous outdoor deployment. It measures roughly 379mm in diameter by 312mm tall and weighs about 10.5kg.