Measurement of wave groups using radar-image sequences

被引：0

作者：

Dankert, H ^{[1
]}

Horstmann, J ^{[1
]}

Günther, H ^{[1
]}

Rosenthal, W ^{[1
]}

机构：

[1] GKSS Forschungszentrum Geesthacht GmbH, Geesthacht, Germany

来源：

BUILDING THE EUROPEAN CAPACITY IN OPERATIONAL OCEANOGRAPHY, PROCEEDINGS | 2003年 / 69卷

关键词：

ocean waves; wave groups; group velocity; real aperture radar;

D O I：

暂无

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

A method is presented to localise wave groups in space and time utilising radar-image sequences of the ocean surface. The distribution and the properties of individual wave groups in spatial-temporal dimensions are investigated for typical sea states. The wave groups are selected from radar-image sequences, which were acquired by the wave monitoring system WaMoS II, by considering the spatial-temporal wave envelope. The amplitude of the wave envelope is determined by calibrating the image spectrum to an in situ sensor spectrum. It is demonstrated that the method can be employed for the determination of both location and size of wave groups from radar images. The spatial and temporal development of wave groups, their extension and velocities are studied. It is shown that the group velocity of waves measured in shallow and deep water agree on average with the group velocities resulting from linear wave theory, but we will show wave groups on the ocean that move with different velocities.

引用

页码：115 / 121

页数：7

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