- Volume 27 Issue 6
This paper presents a sea surface reconstruction method that uses measured radar images by applying filtering techniques and identifying wave characteristics of the surrounding the Ieodo ocean research station using WaveFinder (X-band wave measurement radar), which is installed in the station. In addition, the results obtained from real radar images are used to verify the reconstructed sea surface. WaveFinder is a marine system that was developed to measure wave information in real time. The WaveFinder installed in the station could acquire sequent images for the sea surface at constant time intervals to obtain real time information (Wave height, mean wave period, wave directionality, etc.) for the wave by getting a three-dimensional spectrum by applying an FFT algorithm to the acquired sequent images and wave dispersion relation. In particular, we found the wave height using the SNR (Signal to noise ratio) of the acquired images. The wave information measured by WaveFinder could be verified by comparing and analyzing the results measured using the wave measurement instrument (Sea level monitor) in the station. Additionally, the wave field around the station could be reconstructed through the three-dimensional spectrum and the inverse FFT filtering from the analyzed results for the measured radar images. We verified the applicability of the sea surface reconstruction method by comparing the measured and simulated sea surfaces.
Sequent radar images;3-D FFT;Dispersion relation;3-D IFFT;Sea surface reconstruction
- Nieto Borge, J.C., Alfonso, M., 1994. Methods of Sea State Simulation. CLIMAMARITIMO, 56.
- Nieto Borge, J.C., Rodriguez, G.R., Hessner, K., Gonzalez, P.I., 2004. Inversion of Marine Radar Images for Surface Wave Analysis. J. Atmos. Oceanic Technol., 21(8), 1291-1300. https://doi.org/10.1175/1520-0426(2004)021<1291:IOMRIF>2.0.CO;2
- Nieto Borge, J.C., Hessner, K., Jarabo-Amores, P., de la Mata-Moya, D., 2008. Signal-to-noise ratio analysis to estimate ocean wave heights from X-band marine radar image time series. IET Radar Sonar Navig., 2(1), 35-41. https://doi.org/10.1049/iet-rsn:20070027
- Park, G.I., Choi, J.W., Kang, Y.T., Ha, M.K., Jang, H.S., Park, J.S., Park, S.G., Kwon, S.H., 2006a. The Application of Marine X-band Radar to Measure Wave Condition during Sea Trial. J. SOTECH, 10, 34-48.
- Park, J.S., 2005. Development of Sea Surface Wave and Current Monitoring System by Using X-band Nautical Radar. Ph.D. dissertation, Naval Architecture and Ocean Engineering in Pusan National University.
- Park, J.S., Park, S.G., Kwon, S.H., Park, G.I., Choi, J.W., Kang, Y.T., Ha, M.G., 2006b. Development of a Wave Monitoring System Using a Marine Radar. Journal of Ocean Engineering and Technology, 20(1), 37-42.
- Park, J.S., Yang, Y.J., Park, S.G., Kwon, S.H., 2009. A Study on the Radar Image Simulation for Ocean Waves. Proceedings of the Korean Association of Ocean Science and Technology Societies Conference, Changwon, Korea, 1842-1847.
- Park, J.S., Yang, Y.J., Park, S.G., Kwon, S.H., 2010. A Study on Radar Image Simulation for Ocean Waves Using Radar Received Power. Journal of Ocean Engineering and Technology, 24(1), 47-52.
- Yang, Y.J., Park, S.J., Lee, S.B., Park, J.S., Park, S.G., Kwon, S.H., 2008. A Study on the Simulation of Radar Images. The 6th OSAKA Colloquium on Seakeeping and Stability of Ships, 221-226.