Friday
April 07, 2017
Prof. Gerald Lachapelle from University of Calgary visited Wireless Systems Lab. at Hanyang University and gave a lecture entitled "GNSS Carrier Phase Positioning: Performance and Limitations". The abstract of the seminar is as follows:
Abstract
GNSS carrier phase measurements are the most accurate measurements that can be made with GNSS. Under ideal obstruction-free open sky conditions, kinematic positioning accuracy of a few centimeters can be achieved. Accuracy in static mode can reach the millimeter level. Following a description of these measurements, the conditions under which they can be made successfully are discussed. Operational procedures such as differential methods to reduce or eliminate other system errors are then described. An introduction to the use of multiple frequencies to reduce the effect of the ionosphere follows. Numerous examples are shown to illustrate the capability and limitations of carrier phase measurements. These range from earthquake monitoring to vehicle-to-vehicle relative positioning and pedestrian motion.
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