High-resolution sound velocity profile data compression method based on empirical orthogonal function decomposition

An empirical orthogonal function and sound velocity profile technology, which is applied in electrical digital data processing, digital data information retrieval, relational database, etc., can solve the problem of not mentioned sound velocity profile data compression, etc., so as to reduce the cost of software and hardware and the difficulty of operation and maintenance. , Guaranteed effective, high-resolution effects

CN113051260AActive Publication Date: 2021-06-29NAT UNIV OF DEFENSE TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-06-29

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Abstract

The invention belongs to the technical field of marine acoustics application of three-dimensional temperature-salinity-depth data, and particularly relates to a high-resolution sound velocity profile data compression method based on empirical orthogonal function decomposition. The method specifically comprises the following steps of providing data by using a high-resolution marine reanalysis product, and converting by using a sound velocity formula to obtain the seawater sound velocity profile data; according to the characteristics of the technical field of marine acoustics application, extending the high-resolution and long-time sequence sound velocity profile data under a certain space-time dimension to a seabed sedimentary layer; using a feature vector of a main mode as a primary function of the sound velocity profile empirical orthogonal function decomposition, and compressing and expressing the high-resolution and long-time sequence sound velocity profile information under the certain space-time dimension. According to the invention, the technical scheme of obtaining sound velocity profile data compression from a high-resolution ocean reanalysis product is realized; the effective compression of the sound velocity profile data under the certain time-space dimension is realized, and the beneficial effect that the compression rate of the high resolution and long-time sequence sound velocity profile data is more than 90%, is obtained.
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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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Embodiment Construction

[0048] The present invention will be described in detail below in conjunction with specific embodiments.

[0049] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0050] The invention provides a high-resolution sound velocity profile data compression method based on empirical orthogonal function decomposition. refer to figure 1 , an overall flow chart of the high-resolution sound velocity profile data compression method based on empirical orthogonal function decomposition provided by the present invention, specifically comprising the following steps:

[0051] Step 1. Provide the longitude, latitude, seawater temperature, sa...