ZYAXX-S615/S015/S825：

    This series of antennas comprises:a single frequency GPS antenna, dual-satellite system(GPS+GLONASS) with single frequencyantenna(L1);a dual-frequency GPS antenna(L1,L2),dual-satellitesystem(GPS+GLONASS)with dual-frequency antenna(L1,L2); a triple-satellitesystem(GPS+GLONASS+BeiDou)antenna as well asvarious other satellitecombinations and types of antennas. Any of these antennae can be widely used ingeodesy, marine surveying, tunnel surveying, earthquake monitoring, bridgedeformation monitoring, landslide monitoring, port container operations, etc.Toimprove measurement accuracythis series of antennaeemploys a multiplefeed-point design to ensure thecoincidenceof theantenna phase centreand thegeometrical centre. The antennaefeature: high unit gain, wide directionalpattern beam width, small size and light weight.