Gethin Wyn Roberts

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For the monitoring of man-made structures, and specifically suspension bridges, it is desirable for the measurement system to deliver equal precision in all position components, all the time. When using GPS, the accuracy, availability, reliability and integrity of the position solutions is very dependent on the number and geometric distribution of the(More)
BIOGRAPHY Dr Gethin Roberts is a senior lecturer at the University of Nottingham. He holds a PhD in Engineering Surveying and a Bachelors degree in Mining Engineering, both from The University of Nottingham. He is also the chairman of the FIG's Working Group 6.4 "Engineering Surveys for construction works and structural engineering", as well as chair of(More)
Twelve GPS Block IIF satellites, out of the current constellation, can transmit on three-frequency signals (L1, L2, L5). Taking advantages of these signals, Three-Carrier Ambiguity Resolution (TCAR) is expected to bring much benefit for ambiguity resolution. One of the research areas is to find the optimal combined signals for a better ambiguity resolution(More)
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