Method and system for inverting submarine topography based on satellite altimeter

Abstract

The invention discloses a method for inverting submarine topography based on a satellite altimeter, and the method comprises the steps: obtaining geoid information and vertical line deviation information according to satellite height measurement data; constructing an ocean gravity anomaly model based on a neural network according to ocean gravity anomaly measurement data, satellite height measurement data of an observation sea area, the geoid information and the plumb line deviation information; acquiring ocean gravity anomaly data of the corresponding sea area through the ocean gravity anomaly model; taking the ocean gravity abnormal data, the average water depth and the maximum water depth of the corresponding sea area, and the density difference data of the crustal and the seawater as input data, and constructing a submarine topography inversion model based on a deep neural network; and through the submarine topography inversion model, extracting submarine topography related features in the input data, and inverting the submarine topography of the corresponding sea area. The problems that the spatial resolution of submarine topography inversion is low and the optimal density difference constant is difficult to determine are solved.

Description

technical field [0001] The present application relates to the technical field of seabed terrain inversion, in particular to a method and system for inverting seabed topography based on satellite altimeter. Background technique [0002] The detailed description of the shape of the seabed is of great significance to human beings. The seabed topography or bathymetry provides basic data for many applications such as navigation safety, marine engineering construction, and marine scientific research. Traditionally, the surveying and mapping of seabed topography is carried out by ship-borne echo sounding measurement. Due to the limitations of technical conditions such as high project cost, long measurement cycle, and sparse measurement data, there is currently a problem of data gaps in large areas of the sea. The emergence of satellite radar altimeters With its advantages of large coverage area, strong detection ability, large amount of information, and rapid observation of ocean c...

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Problems solved by technology

[0005] In view of the above defects and improvement needs of the prior art, the purpose of this application is to provide a method and system for inverting seabed topography based on satellite altimeter to solve the problem of low spatial resolution of seabed topography inversion and determination of optimal density difference constant Difficult problems, and then solve the technical limitations of high-precision, high-resolution seabed terrain inversion

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