THE POTENTIAL OF A GROUND BASED TRANSCEIVERS NETWORK FOR WATER DAM DEFORMATION MONITORING
作者单位：School of Surveying and Spatial Information SystemsUniversity of New South WalesSydneyAustralia Leica Geosystems AG-Geosystems DivisionBA EngineeringHeerbruggSwitzerland
会议名称：《水电2006国际研讨会》
会议日期：2006年
学科分类：081504[工学-水利水电工程] 08[工学] 0815[工学-水利工程]
摘 要：The Global Navigation Satellites Systems （GPS, GLONASS and the future GALILEO） has proven to be a useful tool for precision deformation monitoring applications in structural engineering. For continuous structural deformation monitoring on an epoch-by-epoch basis it is desirable for a measurement system to deliver equal precision in all position components, all the time. However, the quality of GPS position solutions is heavily dependent on the number and geometric distribution of the available satellites. Therefore, the positioning precision varies significantly and is three times less in vertical than horizontal coordinates. This situation becomes worse when the line-of-sight to GPS satellites is obstructed to structures, as it is the case for the big water dams when trying to access other interesting parts than only the crest, reducing the number of visible satellites often to less than four. A new positioning technology developed by Locata Technology Australia, that uses a network of ground-based transceivers that cover a specific area of a water dam with strong signals is becoming part of Leica Geosystems solution. This paper discusses the technology and assesses its suitability for use in structural deformation monitoring applications.