Decimeter Positioning For Dredging and Hydrographic Surveying
ARMY TOPOGRAPHIC ENGINEERING CENTER FORT BELVOIR VA
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The U. S. Army Corps of Engineers initiated development of a prototype decimeter differential GPS positioning system for dredging and hydrographic surveying in 1988. This system is to provide real-time accuracies better than one decimeter over ranges up to 20 kilometers from a single reference station. A critical feature is to provide the positions in three dimensions to permit enhanced tidal datum determination. The initial stages of the work have been concept development, feasibility studies, and system analyses. The project has recently concentrated on developing a robust technique to resolve ambiguities on-the-fly. Initial results reported in May 1991 are encouraging. Several experiments are currently being conducted to evaluate alternative resolution methods and to quantify operational limitation of the technology.
- Physical and Dynamic Oceanography
- Civil Engineering
- Navigation and Guidance