Classification of geodesic networks; Adjustment of geodetic networks; Optimization of geodetic network design; Methods of optimization (Linear programming and the Simplex method, Global Optimization Methods-Genetic algorithms); Permanent GPS station networks; Functionality of GPS systems; Structure of GPS systems; Positioning principles, GPS service classes; GPS signals; GPS data; Reception of GPS signals; Errors in GPS positioning; Accuracy evaluation of GPS receivers; Expanding GPS systems; Differential real-time DGPS; Subsequent processing of differential measuring; Inverted DGPS; Monitoring the carrier phase of GPS signals; Formats of DGPS data; Primary data and data on corrections; RTCM data format; RASANT data format; RINEX data format; NMEA data format; Network RTK positioning; Architecture of the system for network RTK positioning; Characterization of the error source; Transfer format; cells; network corrections; Schedule in text messaging; Short text message overview; Examples of correction networks working in the emission regime; GNSMART solution by the company Geo; Leica Spider system; SAPOS system; EUPOS (European POSition Determination System) project; VRS systems; Active referential geodesic GPS basis; Components of the active GPS basis; Permanent stations; Acquisition component; Distribution component; User services; Service classification; Application of service in geodesic terrain survey.