Alpenrhein II: Einsatz von Echolotsystemen zur Dokumentation der Sohlentwicklung
Abstract
Within this project a modular hydrographic surveying system for tributary rivers has being developed, which can be easily mounted on almost any boat. The central components of that system are the hybrid positioning unit, the single-beam echo-sounder and a rugged mobile computer. The echo-sounder is permanently coupled with the high accuracy hybrid positioning unit that consists of a RTKGPS system and a motorized total station with automatic target recognition (TPS). The primary data source for positioning purposes is the RTKGPS solution (centimetre accuracy). In the case of GPS signal loss the TPS system is set up at the river bench and takes over the positioning of the measuring platform by tracking the 360° circular prism mounted on the boat automatically. The position is transmitted to the main computer on the boat via radio link every 0.2s. All sensors of this hydrographical surveying system are synchronised by GPS PPS timestamps. The measurements of all sensors are stored in a central hydrographical data base onboard the boat and are visualized on chart plotters in real time. Thus missing data or measurements of bad quality can be detected immediately, which avoids costly error handling and reduces the post-processing needs.
Publikationen
Project staff
Erwin Heine
Ass.Prof. Dipl.-Ing. Dr.techn. Erwin Heine
erwin.heine@boku.ac.at
Tel: +43 1 47654-87222
Project Leader
04.02.2011 - 31.08.2011