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11 April 2006 Experimental verification of a GPS network: characterization and removal of multipath effects
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The aging Civil Infrastructure System (CIS) in the United States has prompted the need for more effective structural health monitoring (SHM) techniques. Global Positioning Systems (GPS) have shown great promise for SHM, as they allow the total displacement of a structure to be measured, unlike other traditional sensors (i.e. accelerometers and strain gages). However, past research efforts have shown GPS to suffer from the effects of multipath interference, greatly reducing its accuracy in urban areas. In this study, a testing program was developed in which a controlled multipath source was introduced into a GPS network to allow for the characterization and removal of this phenomenon. In addition, the GPS performance was benchmarked against two more widely accepted sensor technologies: a terrestrial positioning system (TPS) and an accelerometer, to demonstrate its utility for monitoring CIS.
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Michael Kochly and Tracy Kijewski-Correa "Experimental verification of a GPS network: characterization and removal of multipath effects", Proc. SPIE 6174, Smart Structures and Materials 2006: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, 61742J (11 April 2006);

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