Numerical simulation and inversion of offshore area depth based on x-band microwave radar
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摘要: 根据海浪频谱模型,对浅海水深进行了数值模拟,提出一种利用X波段微波雷达对近海水深进行探测的方法。该方法利用X波段微波雷达对海杂波成像,结合线性波理论色散方程以及最小二乘算法,可以得到雷达探测区域的水深信息。由武汉大学海态实验室研制的OSMAR-X型雷达是在微波雷达基础上进行改进的测波雷达,现已被证明为一种监测海洋空时状态有效的手段。本文进行了近海水深的数值模拟与反演研究,由于JONSWAP 谱可以描述不同成长阶段的风浪,适合本文不同水深下海浪回波的模拟。文中还给出了位于福建省龙海市的OSMAR-X型测波雷达实测数据的初步分析对比结果,验证了该方法的可行性。该探测方法不仅适用于岸基X波段微波雷达,还适用于船载X波段微波雷达。Abstract: A detection method of offshore area depth utilizing the x-band microwave radar is proposed. The method is based on the sea clutter imaging mechanism of microwave radar, and combined with dispersion equation of the liner wave theorem and least square method (LSM), consequently get the inversion results of water depth in the detected region. The wave monitoring system OSMAR-X exploited by the Ocean State Laboratory, Wuhan University, based on a microwave radar has proven to be a powerful tool to monitor ocean waves in time and space. Numerical simulation and inversion of offshore area depth are carried out here; since JONSWAP model can give description of stormy waves in different growth phase, it is suitable for simulation. Besides, some results from measured data detected by OSMAR-X x-band radar located at Longhai of Fujian Province, China, validates this method. The tendency of the average water depths inferred from the radar images is in good agreement with the tide level detected by Xiamen tide station. These promising results suggest the possibility of using OSMAR-X to monitor operationally morphodynamics in coastal zones. This method can be applied to both shore-based and shipborne x-band microwave radar.
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Key words:
- microwave radar
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Abileah R, Trizna D B. 2010. Shallow water bathymetry with an incoherent x-band radar using small (smaller) space-time image cubes. In: 2010 IEEE International Geoscience and Remote Sensing Symposium (IGARSS). Honolulu, HI: IEEE, 4330-4333 Bell P S. 1999. Shallow water bathymetry derived from an analysis of x-band marine radar images of waves. Coastal Engineering, 37(3-4): 513-527 Bouws E, Günther H, Rosenthal W, et al. 1985. Similarity of the wind wave spectrum in finite depth water: 1. Spectral form. Journal of Geophysical Research: Oceans (1978-2012), 90(C1): 975-986 Chen Siyu, Bai Ning. 2011. Effect analysis of water depth measurement error on discharge data reorganization accuracy. Heilongjiang Science and Technology of Water Conservancy (in Chinese), (4): 19-20 Cui Limin. 2010. Study on remote sensing mechanism and retrival method of ocean wave and current with x band radar [dissertation]. Qingdao: Graduate School of Chinese Academy of Sciences (Marine Research Institute), 111 Hasselmann K, Barnet T P, Bouws E, et al. 1973. Measurements of Wind- Wave Growth and Swell Decay during the Joint North Sea Wave Project (JONSWAP). Hamburg: Deutches Hydrographisches Institut Hessner K, Reichert K, Rosenthal W. 1999. Mapping of sea bottom topography in shallow seas by using a nautical radar. In: Proceedings of the 2nd International Symposium on Operationalization of Remote Sensing. Enschede, 16-20 Gangeskar R. 2002. Ocean current estimated from x-band radar sea surface, images. IEEE Transactions on Geoscience and Remote Sensing, 40(4): 783-792 Kitaigordskii S A, Krasitskii V P, Zaslavskii M M. 1975. On Phillips' theory of equilibrium range in the spectra of wind-generated gravity waves. J Phys Oceanogr, 5: 410-420 Seemann J, Senet C M, Dankert H, et al. 1999. Radar image sequence analysis of inhomogeneous water surfaces. In: Tescher A G, Co D. Proceedings of the Conference on Applications of Digital Image Processing XXII. Bellingham: Society of Photo-Optical Instrumentation Engineers, 3808: 536-546 Senet C M, Seemann J, Flampouris S. 2008. Determination of bathymetric and current maps by the method DISC based on the analysis of nautical x-band radar image sequences of the sea surface (November 2007). IEEE Transactions on Geoscience and Remote Sensing, 46(8): 2267-2279 Tuckcr M J. 1991. Waves in Ocean Engineering: Measurement Analysis and Interpretation. London: Ellis Horwood Wang Jing, Tang Junwu, He Yijun, et al. 2013. The Retrieval of a nearshore wave frequency spectrum with X-band radar based on Neural Network. Haiyang Xuebao (in Chinese), 35(2): 43-51 Wang Yanfei, Stepanova I E, Strakhov V N, et al. 2011. Inverse Problems in Geophysics and Solution Methods (in Chinese). Beijing: Higher Education Press Wen Shengchang, Yu Zhouwen. 1984. Ocean Wave Theory and Calculation Principle (in Chinese). Beijing: Science Press Wu Yanqin, Wu Xiongbin, Cheng Feng, et al. 2007. Basic analysis on the extraction of ocean dynamic parameters with an x-band radar. Journal of Remote Sensing (in Chinese), 11(6), 817-825 Young I R, Rosenthal W, Ziemer F. 1985. A three-dimensional analysis of marine radar images for the determination of ocean wave directionality and surface currents. Journal of Geophysical Research: Oceans (1978-2012), 90(C1): 1049-1059
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