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Airborne laser sounding broken wind wave sea surface model construction method

An airborne laser and construction method technology, applied in radio wave measurement systems, special data processing applications, complex mathematical operations, etc., can solve problems affecting the authenticity of broken wind and wave sea surface fitting, and achieve the effect of improving sounding accuracy

Active Publication Date: 2021-07-23
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0003] The current mainstream sea surface fitting methods mostly use the more classic wave spectrum model. For the sea surface containing broken wind waves, the broken wind wave sea surface is not distinguished from the calm sea surface, but the same wave spectrum model is used for unified fitting. Therefore, it is necessary to solve this problem and propose a model construction method for airborne laser sounding broken wind and wave sea surface, so as to realize the accurate expression of airborne laser sounding broken wind and wave sea surface

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  • Airborne laser sounding broken wind wave sea surface model construction method
  • Airborne laser sounding broken wind wave sea surface model construction method
  • Airborne laser sounding broken wind wave sea surface model construction method

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Embodiment Construction

[0051] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0052] The invention provides a method for constructing an airborne laser sounding broken wind and wave sea surface model, the process of which is as follows figure 1 shown; includes the following steps:

[0053] Step 1: Construct an initial instantaneous 3D sea surface model based on the wave spectrum and wave direction spectrum.

[0054] Based on the theory of wave spectrum and direction spectrum in oceanography, the instantaneous three-dimensional sea surface model can be regarded as a superposition of infinite cosine waves with different wave heights, amplitudes, frequencies, phases, motion periods, and motion directions. The wave direction spectrum constructs an initial instantaneous 3D sea surface model based on the wave spectrum.

[0055] In a further embodiment, step 1 specifically includes the following steps:

[0056] Step 1.1: In o...

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Abstract

The invention discloses an airborne laser sounding broken wind wave sea surface model construction method, and belongs to the technical field of marine surveying and mapping. The method comprises the following steps: constructing an initial sea wave spectrum sea surface model based on a sea wave spectrum principle; then extracting a broken wave crest surface of the fitted sea surface by using a mass point-spring model distribution simulation method; and finally, fitting the extracted broken wave crest surface into a broken wave crest sea surface model by utilizing a broken wave sea surface fluctuation theoretical model, and fusing the sea wave spectrum sea surface model and the broken wave crest sea surface model into a complete and real instantaneous three-dimensional broken wind wave sea surface model. Through the method, the construction of the instantaneous three-dimensional broken wind wave sea surface model is realized, and the method has an important data support effect on sea surface refraction correction, sea surface abnormal point detection and depth measurement precision improvement in airborne laser depth measurement.

Description

technical field [0001] The invention belongs to the technical field of marine surveying and mapping, and in particular relates to a method for constructing an airborne laser sounding broken wind and wave sea surface model. Background technique [0002] The airborne laser sounding system has the characteristics of high measurement accuracy, high measurement point density, high work efficiency, strong mobility, and continuous measurement. It is especially suitable for rapid detection of complex terrain such as shallow water areas and areas near islands and reefs. Seamless mosaic of above and below water terrain. It is of great significance to meet the urgent needs of ocean, surveying and mapping, water conservancy, transportation, diplomacy, navy and many other aspects. The airborne laser sounding system uses a 532nm blue-green laser with strong water penetration ability as the seabed detection method. When the blue-green laser reaches the sea surface, part of the laser beam ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/48G06F30/20G06F17/15
CPCG01S7/4802G06F30/20G06F17/15
Inventor 杨安秀吴自银阳凡林宿殿鹏马跃王贤昆亓超郭亚栋
Owner SHANDONG UNIV OF SCI & TECH
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