Submarine topography high-resolution three-dimensional gravitation model based on Jason-1 satellite data

Abstract

The invention discloses a submarine topography high-resolution three-dimensional gravitation model based on Jason-1 satellite data. The method comprises the following steps: carrying out the height measurement research on a target sea area based on a Jason-1 satellite, and carrying out the site investigation on the target submarine topography based on a multi-beam echo survey system; drawing the target submarine topography according to the survey data; calculating the gravitation anomaly based on satellite height measurement data; calculating the gravitation vertical gradient based on satellite height measurement data; calculating gravitational anomaly and vertical gravitational gradient anomaly by using a model based on other measured sea areas for analysis; superposing and comparing theheight measurement data of the target sea area and the submarine topography of the target sea area; calculating the relative relation between submarine topography distribution and gravitation distribution; based on the relation between the gravitation distribution of a target sea area and the submarine topography, conveniently extending the change trend of the submarine topography through the change of the gravitational field, and otherwise, deducing the three-dimensional gravitational field model through actually measuring the submarine topography.

Description

technical field [0001] The invention belongs to the related technical field of seabed surveying and mapping, and in particular relates to a high-resolution three-dimensional gravity model of seabed topography based on Jason-1 satellite data. Background technique [0002] One of the types of marine surveying and mapping is the surveying and mapping work based on the measurement of seabed fluctuations. Seabed topographic surveys are usually carried out by echo sounders and side-scan sonars installed on ships to simultaneously measure water depth and the size and position of underwater features. According to methods such as multi-beam echo sounding system, submarine photogrammetry, airborne laser sounding and ocean remote sensing sounding, according to the distance from the coast, the positioning of each measuring point can adopt optical positioning, radio positioning, hydroacoustic positioning, satellite positioning and Combined positioning and other methods, when using diving...

AI Technical Summary

Problems solved by technology

[0003] The existing three-dimensional gravity technology has the following problems: the sea level is not a flat distribution, that is, the sea surface in some areas is convex, and the sea surface in some areas is concave, and the unevenness of the sea surface is mostly caused by the gravitational field. The height of the sea is related to the accumulation of material formed by the nearby huge mountains or trenches. The accumulation of this material can make its surface gravitationally bent, thereby causing the unevenness of the sea surface. By studying the large-scale unevenness of the sea surface, we know The change of seabed topography can deduce the gravitational field at the target sea area. At present, there is no in-depth research on the change of seabed topography on the change of gravitational field. This field is relatively blank, and it is urgent to solve the gravitational field through the change of seabed topography. translation problem