Determination of Mean Sea Level by Tide Level Observations Using Ultrasonic Sensors.

Lee, S.-J.; Yun, H.-S., and Shen, C., 2023 Determination of mean sea level by tide level observations using ultrasonic sensors. In: Lee, J.L.; Lee, H.; Min, B.I.; Chang, J.-I.; Cho, G.T.; Yoon, J.-S., and Lee, J. (eds.), Multidisciplinary Approaches to Coastal and Marine Management. Journal of Coastal Research, Special Issue No. 116, pp. 205-209. Charlotte (North Carolina), ISSN 0749-0208. In this study, the average sea level was determined by measuring the height of the sea level at intervals of 0.6 seconds using Raspberry Pi 4 and an ultrasonic sensor. The resolution distance of the ultrasonic sensor is available from 27 cm to 800 cm, and the measurement accuracy is about 1cm. The experimental area is Sokcho on the east coast of Korea, and observations were made using an ultrasonic sensor and a Raspberry Pi for about 10 consecutive days. The observed results were analyzed using T_TIDE (Pawlowicz, Beardsley, and Lentz, 2002) and S_TIDE (Pan et al., 2018). A MATLAB toolbox, S_TIDE, developed from the widely used T_TIDE, is used to realize the approach. S_TIDE can separate oscillations in MWL, amplitudes, and phases on different time scales within a given frequency band using different number of IPs. The tidal level observation technique used in this study is a way to easily observe long-term data. [ABSTRACT FROM AUTHOR]