SAR wave pattern directional ocean wave spectrum product optimization algorithm

An optimization algorithm and directional spectrum technology, applied in the field of algorithms, can solve problems such as the difficulty of first guessing the spectrum, the inability to recover high-frequency information of waves, and the fact that it is not the wave directional spectrum.

Active Publication Date: 2017-08-18
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology

[0007] 1. MPI inversion method: depends on the first guess spectrum, but it is difficult to obtain the quasi-real-time first guess spectrum
[0008] 2. Cross-spectrum inversion method: It is impossible to restore the hig...

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  • SAR wave pattern directional ocean wave spectrum product optimization algorithm
  • SAR wave pattern directional ocean wave spectrum product optimization algorithm
  • SAR wave pattern directional ocean wave spectrum product optimization algorithm

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] see Figure 1-7 , an optimization algorithm for SAR wave mode ocean wave direction spectrum products, comprising the following steps:

[0022] (1) Separation of wind wave spectrum and swell wave spectrum of WVW wave direction spectrum: Based on the relational expression of wind direction wave energy transfer proposed by Komen et al., Among them, β=1.3, U 10 is the wind speed at a height of 10m, c p is the wave speed, θ is the direction of the wave, ...

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Abstract

The invention discloses an SAR wave pattern directional ocean wave spectrum product optimization algorithm, which comprises the following steps: (1) a wind wave spectrum and a swell spectrum of the WVW directional ocean wave spectrum are separated; (2) a wind wave spectrum model is introduced; (3) spectrum segmentation and cross adjustment on the wind wave spectrum are carried out; and (4) the swell spectrum separated from the WVW directional ocean wave spectrum is effectively fused with a wind wave spectrum through Wen's spectrum adjustment to acquire a new directional ocean wave spectrum. The algorithm does not use a quasi-real time first guess spectrum which is hard to acquire but adopts an already-verified cross spectrum inversion result WVW product with a high inversion precision in the swell part, with the widely-applied wind wave spectrum (Wen's spectrum) model, the two are effectively fused, and a directional ocean wave spectrum with the swell information and the wind wave information is obtained.

Description

technical field [0001] The invention relates to an algorithm, in particular to an optimization algorithm of a SAR wave mode ocean wave direction spectrum product. Background technique [0002] The wave direction spectrum simultaneously describes the distribution of wave energy relative to the frequency and direction of the wave, and all wave parameters (such as effective wave height, average wave direction, average wave period, and average wavelength, etc.) can be obtained from it. Determination of wave direction spectrum is one of the core issues in ocean wave research. Spaceborne SAR is an active microwave imaging radar, which can obtain radar images with a spatial resolution as high as 1-10m, and has the advantage of working around the clock. Spaceborne SAR does not directly image ocean waves, but only interacts with short gravity waves or capillary waves on the ocean surface to form images. Based on the modulation effect of ocean waves on the short gravity waves on the...

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Application Information

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IPC IPC(8): G01S13/90
CPCG01S13/904G01S13/9027
Inventor 刘晓燕杨倩吴承璇张浩宗芳伊王秀芬
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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