The GD-100 is a four-star multi-frequency satellite navigation antenna with high gain, high sensitivity, multi-system compatibility. It covers the frequency band of GPS L1/L2 GLONASS G1/G2 BDS B1/B2/B3 GALILEO E1/E5b. Which meets the needs of multi-system compatible and high-precision users of surveying equipment. It can be applied to geodesy surveying, navigation positioning, precision agriculture and marine surveying.