Trimble GEDO systems combine different technologies. The systems are individually composed for a wide range of track surveying tasks according to the environmental and operating conditions. For example, a Trimble GEDO CE 2.0 track measurement trolley can be equipped with GNSS as well as optical instruments and inertial measurement technology to determine its absolute position. All system components are designed for reliable operation even under the harshest conditions. The flexible and modular design allows Trimble GEDO systems to be adapted to new tasks and developments.