Angle Response Correction Method and Measurement System Based on Multi-beam Backscatter Intensity Data

Abstract

The invention discloses an angle response correction method and a measuring device based on multi-beam backscattering intensity data. The method includes the following steps: (1) performing a series of preprocessing work on multi-beam backscattering intensity data, such as propagation loss compensation , Irradiated area correction, etc.; (2) By carrying out equiangular resampling to continuous N ping (pulse) backscattering intensity data, and taking the average value of the continuous N ping data after resampling to obtain the angle response curve; (3) Use Gaussian fitting to fit the angle response curve to obtain a continuous smooth angle response curve; (4) perform quadratic differentiation on the fitted angle response curve to obtain the angle response model correction parameters; (5) give multiple Adaptive angular response correction model for beam backscatter intensity data. The present invention fully considers the change law of multi-beam backscattering intensity data in complex submarine bottom environment, improves the existing angle response model on this basis, and proposes an improved self-adaptive angle response model, which greatly weakens the angle Response to the effects of multibeam backscatter intensity data improves the accuracy of seafloor sediment classification.

Description

technical field [0001] The invention relates to an angle response correction method based on multi-beam backscattering intensity data, in particular to an angle response correction method in a complex submarine bottom quality change environment. Background technique [0002] Multi-beam echo sonar (Multi-beam Echo Sonar, MBES) is currently one of the most widely used oceanographic mapping instruments. The multibeam sonar system uses strip measurement technology to measure the water bottom with full coverage, which can not only obtain high-precision water depth data, but also high-precision backscatter intensity data [1-2] . Backscatter intensity data has important applications in many disciplines such as ocean bottom, marine resources, and marine environment. At present, the domestic research on multi-beam sonar mainly focuses on the bathymetry part, while the research on backscatter intensity data processing less [3-4] . Due to the complexity of the seabed environment an...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to establish an adaptive angle response correction model based on the complex sea bottom environment, fully taking into account the change law of backscattering intensity data at different incident angles, so as to meet the requirements of bottom classification. In order to meet the high precision requirements in the fields such as multi-beam backscattering intensity data, an angle response correction method and its measurement system are provided.

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