基于导航雷达图像阴影反演有效波高

doi:10.12305/j.issn.1001-506X.2025.10.10

Abstract

Abstract:

The sea clutter of X-band marine radar contains abundant wave information and can be used for remote wave measurement. In recent years, in the process of estimating significant wave height by shadow method based on X-band radar, due to the existence of complementary error function and exponential term, it is difficult to obtain the numerical analytic solution of wave steepness, which limits the application of shadow method in the inversion of significant wave height. The complementary error function is approximated according to the actual measurement conditions. Thus, by solving the approximate equation, the wave steepness of the ocean wave can be obtained directly from the illuminance probability, and the significant wave height of the ocean wave is retrieved. The X-band images collected from Pingtan Test site in Fujian Province are used for verification. Experimental results show that the improved shallow method can replace the existing shadow method to inversion significant wave height, the correlation coefficient of the two inversion results is 0.998 0, the root mean square error is 0.022 4 m, and the operation time is shortened from 6.367 s to 0.088 s.

Key words: X-band radar, Smith fitting function （SFF）, wave steepness, significant wave height

CLC Number:

Huili SONG, Yanbo WEI, Kailun LIU, Runbo ZHANG, Zhizhong LU. Significant wave height inversion based on navigation radar shadow image[J]. Systems Engineering and Electronics, 2025, 47(10): 3228-3234.

Figures/Tables 15

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指标	一次函数	二次函数	三次函数
r	0.922 3	0.997 5	0.999 988
RMSE/m	0.056 5	0.010 3	0.000 735

指标	ISM与SFF	ISM与浮标	SFF与浮标
r	0.998 0	0.722 5	0.702 7
RMSE/m	0.022 4	0.328 8	0.317 7

[1]	Zhichao YAO, Xiaoliang CHU, Junyi FAN, Feng WANG. Retrieving significant wave height based on Prewitt operator fromX-band radar images [J]. Systems Engineering and Electronics, 2022, 44(4): 1182-1187.
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[3]	YUAN Gannan, JIA Ruicai, ZHANG Hongwei. Improved algorithm on retrieval ocean surface current based on X-band radar [J]. Journal of Systems Engineering and Electronics, 2012, 34(2): 276-281.

Significant wave height inversion based on navigation radar shadow image

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