Data Compression Method of High Resolution Sound Velocity Profile Based on Empirical Orthogonal Function Decomposition

Abstract

The invention belongs to the technical field of marine acoustics application of three-dimensional temperature, salt and depth data, and in particular relates to a high-resolution sound velocity profile data compression method based on empirical orthogonal function decomposition, specifically as follows: provide data with high-resolution ocean reanalysis products, and use the sound velocity formula Convert and obtain the seawater sound velocity profile data; according to the characteristics of the marine acoustics application technology field, extend the high-resolution and long-term sequence sound velocity profile data in a certain space-time dimension to the seabed sediment layer; use the eigenvector of the main mode as the sound velocity profile The basis function of empirical orthogonal function decomposition, which compresses and expresses the high-resolution and long-term sequence sound velocity profile information in a certain space-time dimension. The present invention realizes the technical scheme of obtaining sound velocity profile data compression starting from high-resolution ocean reanalysis products; realizes effective compression of sound velocity profile data in a certain space-time dimension, and obtains high-resolution, long-time sequence sound velocity profile data compression rate More than 90% beneficial effect.

Description

technical field [0001] The invention belongs to the technical field of ocean acoustics application of three-dimensional temperature, salt and depth data, and in particular relates to a high-resolution sound velocity profile data compression method based on empirical orthogonal function decomposition. Background technique [0002] Marine interests are related to national security and development interests. In the field of marine acoustics application technology, the sound velocity profile is an important data basis for the modeling and analysis of the underwater acoustic field, the calculation and evaluation of acoustic performance, and the perception of underwater acoustic target information. High-resolution sound velocity profile data help to obtain refined ocean acoustic information, thereby improving the support capability and level of marine environmental data. Due to the large spatial scale of the Earth's oceans, the horizontal spatial resolution of high-resolution mar...

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Problems solved by technology

CN109725053A discloses a method for obtaining water acoustic field characteristic data based on high-resolution ocean reanalysis products, and its data analysis object is the same as the present invention, but does not mention adopting empirical orthogonal function decomposition to carry out data compression of sound velocity profile

CN110222872A discloses a marine multi-element medium and long-term statistical prediction method based on empirical orthogonal function decomposition, which mainly solves the problem of improving the timeliness of marine forecasting on the basis of marine forecasting models

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