Angle response correction method based on multibeam backscattering intensity data and measurement system thereof

Abstract

The invention discloses an angle response correction method based on multibeam backscattering intensity data and a measurement system thereof. The method comprises the following steps: (1) multibeam backscattering intensity data are subjected to a series of pretreatment work such as propagation loss compensation and radiation area correction; (2) through carrying out equal angle resampling on continuous N ping (pulse) backscattering intensity data and averaging the continuous N ping data after resampling, an angle response curve is acquired; (3) a gaussian fitting mode is used for fitting the angle response curve, and a continuous and smooth angle response curve is acquired; (4) the angle response curve after fitting is subjected to quadratic differential to acquire angle response model correction parameters; and (5) a multibeam backscattering intensity data adaptive angle response correction model is given. The multibeam backscattering intensity data change rule under a complicated seabed sediment environment is fully considered, the existing angle response model is improved on the basis, an improved adaptive angle response correction model is provided, influences on the multibeam backscattering intensity data by the angle response are greatly weakened, and the seabed sediment classification precision is improved.

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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