High Precision Deformation Monitoring Using Differential GPS
Post-mission analysis of observations to the Global Positioning System (GPS) have proven in the past their capability to derive sub-centimeter to millimeter level accuracies for baselines up to 5–10 km.
Considering that we are interested (1) in monitoring three-dimensional relative position changes in the millimeter range over short time spans, and (2) that we want to have the information in an economical way in or near real-time, (3) that we operate only in a radius of up to 7–10 km around a master station, we have built up a continuous real-time DGPS deformation monitoring system. The high portability as well as the high data rates (up to 20 Hz) recommend such a system for its use in monitoring of all kinds of man-made structures where the early detection of possible movements may prevent disasters.
The paper presents this new sophisticated system, outlines the algorithms, the software and hardware architecture as well as reports from first experiences in the field.
KeywordsGlobal Position System Global Position System Carrier Phase Global Position System Receiver Monitor Station
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