A full-constellation, triple-frequency survey antenna that tracks GPS, GLONASS, BeiDou, Galileo, QZSS, IRNSS, SBAS and L-Band signals for precise positioning work. Its low-noise amplifier and stable phase center deliver millimeter-level accuracy and strong signal tracking even at low satellite elevation angles, while the sealed IP67-rated housing withstands dust, rain, and rough field handling. Compact at about 147mm across and under 500g, it suits land survey, construction, precision agriculture, and structural deformation-monitoring setups that need a dependable external GNSS antenna.