The feasibility study of using GPS buoy to observe the sea states in Hong Kong

Y. Chen, W. Chen, D. Zheng, A. Chan, X. Ding, J.C.H. Chao

Abstract:	The sea level variation is a very complex phenomenon. There are many factors, such as pressure, temperature, wind, wave motion and salinity, affecting the degree of sea level variations. The conventional tide gauge can only provide the sea level data at a fix location. Currently, all the sea level measurements in Hong Kong are recorded hourly by still well-type tide gauges. This paper is aimed at studying the feasibility of using GPS buoy to monitor the sea states in Hong Kong. The GPS buoy can float on the water and it can measure both sea level and wave motion simultaneously. The ability of GPS in measuring dynamic motions and recording atmospheric changes in short time intervals can help in obtaining more information for a more accurate sea level determination. Initial tests of using GPS buoy to record the sea level variation in offshore area of Hong Kong have been carried out. The observed GPS results were then compared with the tide gauge records to investigate the accuracy of such GPS application. Besides, through the analysis of high frequency components of the GPS buoy data, the wave motion can be partially separated from the sea level records. These results help the further study of wave motion and develop a more realistic sea level model.
Published in:	Proceedings of the 2003 National Technical Meeting of The Institute of Navigation January 22 - 24, 2003 Disneyland Paradise Pier Hotel Anaheim, CA
Pages:	748 - 754
Cite this article:	Chen, Y., Chen, W., Zheng, D., Chan, A., Ding, X., Chao, J.C.H., "The feasibility study of using GPS buoy to observe the sea states in Hong Kong," Proceedings of the 2003 National Technical Meeting of The Institute of Navigation, Anaheim, CA, January 2003, pp. 748-754.
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