Results of Real-Time Testing of GPS Carrier Phase Ambiguity Resolution On-the-Fly

摘要

The U. S. Army Corps of Engineers has been developing a GPS carrier phase basedpositioning system for hydrographic surveying and dredging since 1988. This system provides real-time three dimensional positions with horizontal and vertical accuracies better the one decimeter over ranges up to 20 kilometers from a single reference station without static initialization. The project has passed from concept development through feasibility studies, system analysis, resolution of carrier ambiguities on-the-fly (OTF), to final system integration which is nearing completion. The real-time testing of the system began in March of 1993. This testing was performed under varying operating conditions to evaluate the limits of OTF ambiguity resolution for precisely positioning moving platforms. This paper will summarize the results of those tests. Early realtime tests performed have shown 1-3 centimeters in all three dimensions. The final design of the realtime system and its integration to hydrographic. Survey platforms will also be discussed.