Abstract: This paper discusses operational issues which affect the reliability and affordability of Global Positioning System (GPS)-based structural deformation monitoring systems. Two primary differences between GPS and most other sensors commonly used are the amount of data generated and the complexity of data processing functions. If these functions are not handled appropriately, operational costs can outweigh the relative benefits of GPS and make the system unaffordable. However, a significant amount of automation can be designed into the system to minimize labor costs and risk of human error. !8
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