Method for separating significant wave heights of wind waves and swells via height gauge

Abstract

The invention relates to a method for separating significant wave heights of wind waves and swells via a height gauge. The method comprises the following steps of: constructing a feature function relationship between dual-waveband back scattering coefficients of the height gauge and wind speed and wave age; solving an inverse function relationship between the wind speed and wave age and the dual-waveband back scattering coefficients, and calculating a wind speed and a wave age by utilizing the dual-waveband back scattering coefficients observed by the height gauge; and calculating an effectivewave height of a wind wave, and calculating an effective wave height of a swell by combining a total effective wave height observed by the height gauge. According to the method, the separation of effective wave heights, observed by the height gauge, of wind waves and swells is realized, the ocean dynamic environment monitor and identification ability is improved, novel data products of the heightgauge are obtained, and different requirements of scientific research and engineering application are satisfied.

Description

technical field [0001] The invention relates to a method for separating effective wave heights of wind waves and swell waves, in particular to an altimeter method for separating effective wave heights of wind waves and swell waves, and belongs to the technical field of marine remote sensing. Background technique [0002] Waves are the most visible physical phenomenon on the ocean surface. Waves often exist in the form of mixed waves where wind waves and swell waves coexist. Wind waves refer to waves generated by local winds, while swell waves are waves transmitted from other sea areas. There are significant characteristic differences between wind waves and swell waves: wind waves have strong nonlinear characteristics and are an important research object of sea-air boundary layer processes; while swell waves have strong destructive power and have important applications in ocean engineering. Therefore, it is of great scientific and practical value to accurately separate the c...

AI Technical Summary

Problems solved by technology

Sea surface fixed-point observation is mainly based on buoy observation, which has the advantages of high observation accuracy and reliability, but the observation distribution is sparse, the observation area is extremely limited, and it is difficult to achieve large-scale observation

Shipborne observation also has the problem of limited observation range, short observation time and high observation cost

The means of spaceborne observation of sea waves can be based on synthetic aperture radar and altimeter, among which the synthetic aperture radar can only observe the wave height of swell waves under normal sea conditions, but cannot observe the effective wave height of wind waves

The altimeter can realize the observation of the global coverage area of ​​the significant wave height of the wave, but the existing technology cannot separate the wind wave and swell components of the significant wave height of the wave

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