GeoMax GNSS receivers Zenith10  20 and Zenith 25 Pro are now listed at the official websites of the IGS, International GNSS Service and the NGS, National Geodetic Survey. The listing is the outcome of three successful type mean calibrations by an official and authorized external calibration institute. This confirms GeoMax as an established high precision GNSS manufacturer. IGS (International GNSS Service) NGS (National Geodetic Survey)