טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
Ph.D Thesis
Ph.D StudentKashany Israel
SubjectGeodetic Control Networks in the Era of Permanent GPS
Stations
DepartmentDepartment of Civil and Environmental Engineering
Supervisor Professor Haim Papo


Abstract

The tremendous progress in recent years in satellite measurement technologies and the extremely high accuracies that are obtained did not bring up yet a parallel modification in our concepts of a geodetic control network. Even if it seems that the new measurement methods are being effectively applied worldwide for the establishment of control networks, they lack an advanced and uniform method. It is somewhat annoying to realize that the great potential of the new measurement methods has been only partially exploited so far. The optimal configuration and overall architecture of future geodetic control networks have not been studied sufficiently and are in fact still undefined. The study defined a fundamental global model for a three dimensional kinematic/dynamic geodetic control system, including the steps to be taken and the appropriate tools for its application, to replace the existing classical geodetic control. The study covers a broad spectrum of issues - starting with the future Geodetic Control System configuration definition and the ways to use this network, and terminating with the connection to the Classical Control Network. A seemingly promising Satellite Geodetic Control Network configuration and architecture is one based on a sparse set of permanent GPS stations 50-100 km apart. An extended experiment verified any reasonable doubt this working assumption concerning the measurement of base points in the new network. The accuracies obtained from GPS measurements taken over a period of two hours, were in the order of magnitude of 0.5 centimeters in the horizontal components and 2 centimeters in the vertical component.