SEGY-based visual display method for shallow stratum profile original data

Abstract

The invention discloses a visual display method for shallow stratum profile original data based on SEGY, and the method comprises the steps: firstly, referring to ocean survey specifications, combining with the on-site water depth topographic survey conditions, collecting and obtaining the shallow stratum profile original data under the condition that the requirements of survey line arrangement and observation system parameters are met, and storing the shallow stratum profile original data in an SEGY file format; importing a shallow stratum profile original data file of the SEGY of a certain measuring line, realizing data reading and decoding by using Matlab programming, and extracting all echo signal data of the measuring line by taking Ping as an abscissa and time depth as an ordinate; programming the extracted echo signal data to perform surge static correction, multiple wave suppression and true amplitude recovery processing, and generating a shallow stratum profile map to realizeimage visualization of the shallow stratum profile data. The method can be applied to analysis of single-channel and multi-channel seismic original data of deep and shallow water type shallow stratumprofiles mainly based on SEGY, and meanwhile necessary reference can be provided for analysis of side-scan sonar original data mainly based on an XTF format.

Description

technical field [0001] The invention relates to a method for ocean surveying and mapping, in particular to a method for visually displaying raw data of shallow stratum sections based on SEGY. Background technique [0002] With the development of marine surveying and mapping and the needs of marine engineering survey, seabed bottom detection is an important content for the types and properties of shallow seabed sediments. The traditional submarine sediment detection method is to use clam-type, box-type, gravity and other samplers to collect sediment samples on site and transport them to the laboratory for analysis and testing. It is the most direct and effective method to obtain the classification and properties of the sediment, but it is expensive It requires a lot of manpower and financial resources, takes a long time, and can only obtain discrete sea bottom particle data. Seabed bottom inversion based on acoustic telemetry refers to the technology of using single-beam, mu...

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Problems solved by technology

[0005] In view of the above prior art, in order to solve the problem that the office processing of the raw data of the shallow stratum profile relies too much on international commercial software, the present invention proposes a visual display method of the raw data of the shallow stratum profile based on SEGY, which is based on the measured data On the basis of the survey line, set up reasonable observation system parameters (horizontal distance between towfish and GPS, towfish entry depth, excitation frequency and interval, etc.) , using Matlab programming to read the number of sampling points, sampling rate, line number, track number, and XY coordinates of a single survey line, and analyze and obtain the echo signal data in the shallow stratum profile data, and through denoising, multiple wave suppression, and true amplitude Restoration and other processing work to generate shallow stratum profile

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