A method for shipborne sonar bathymetry line design using limited-band seabed topography

Abstract

The invention discloses a method for designing a shipborne sonar sounding survey line by using finite-band submarine topography. The method comprises the following steps: establishing a finite-band submarine topography model of a target sea area by using an inversion algorithm; calculating the terrain roughness of the target sea area; interpolating the finite-band submarine topography model to a survey line control point, and calculating a sea depth residual error at the survey line control point; gridding the sea depth residual error at the measuring line control point to obtain a gridding residual error; superposing the gridding residual error to the finite wave band submarine topography model to obtain a corrected finite wave band submarine topography model; on the basis of the finite-band submarine topography model, continuously increasing the density, namely the measuring line density, of ship measuring points, and counting the precision of the corrected finite-band submarine topography model through check points; and comparing the relationship between the target sea area terrain roughness and the survey line density to obtain the survey line density corresponding to the target sea area terrain roughness. According to the invention, efficient, accurate and low-cost measurement can be realized.

Description

technical field [0001] The invention belongs to the technical field of marine engineering surveying, and in particular relates to a method for designing a shipborne sonar bathymetry line by using a limited-band seabed topography. Background technique [0002] For the world, the ocean area accounts for about 71% of the earth's surface area, and obtaining seabed topographic data is of great practical significance for earth science research. However, at present, the ship-based seabed topography survey and the AUV (Autonomous Underwater Vehicle, AUV for short) / ROV (Remote Operated Vehicle, ROV for short) / deep towing system are used as platforms for bathymetry measurement by means of ships equipped with multi-beam / single-beam echo sounders. Submarine-based measurement methods carrying multi-beam bathymetry systems, side-scan sonar systems, and pressure sensors to measure sea areas usually face the "invisible" seabed environment, and the measurement process is often blind (Zhao Ji...

AI Technical Summary

Problems solved by technology

At present, relying on the satellite altimetry and gravity data to invert the limited-band sea depth model, there is still a technical gap in the design of the shipborne sonar survey line layout density scheme in the target sea area. Invented a method of using the limited-band submarine topography model obtained from the inversion of satellite altimetry and gravity data as a priori reference, supplemented by topographic statistical features-topographic roughness as a geomorphic parameter index to design a method for the layout density scheme of surveying sea areas, which is highly efficient It is of great practical significance to obtain a high-precision seabed terrain model through accurate and low-cost surveying

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