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A Real-time Calculation Method of Vertical Line Deviation Based on Horizontal Tensor Gravity Gradient

A vertical line deviation and gravity gradient technology, applied in the field of real-time calculation of vertical line deviation based on horizontal tensor gravity gradient, can solve the problems of being easily restricted by terrain and unable to realize real-time calculation of vertical line deviation, and achieve real-time and accurate calculation Effect

Active Publication Date: 2021-09-24
TIANJIN NAVIGATION INSTR RES INST
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Problems solved by technology

This method is susceptible to terrain constraints
None of these four algorithms can realize the real-time calculation of the vertical deviation and provide real-time parameters for the inertial navigation system

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  • A Real-time Calculation Method of Vertical Line Deviation Based on Horizontal Tensor Gravity Gradient
  • A Real-time Calculation Method of Vertical Line Deviation Based on Horizontal Tensor Gravity Gradient
  • A Real-time Calculation Method of Vertical Line Deviation Based on Horizontal Tensor Gravity Gradient

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Embodiment Construction

[0087] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0088] A real-time calculation method of vertical line deviation based on horizontal tensor gravity gradient, which establishes the linear relationship between gravity gradient and latitude and longitude in different coordinate systems, and uses the vertical line deviation of 2 to 3 known points as reference points to carry out vertical line calculation. Deviation iterative solution.

[0089] The specific process is as follows:

[0090] According to the definition of vertical deviation, the essence of vertical deviation is the difference of normal direction in different coordinate systems (Cartesian coordinates and standard ellipsoidal coordinate systems).

[0091] Under the Cartesian coordinate sys...

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Abstract

The invention discloses a real-time calculation method for a vertical line deviation based on a horizontal tensor gravity gradient, comprising the following steps: step 1, establishing a corresponding relationship model between a gravity potential field and a position deviation under a Cartesian coordinate system; step 2 , in the standard ellipsoidal coordinate system, establish the corresponding relationship model between the gravity potential field and the position deviation; Step 3, according to the mathematical model defined by the vertical line deviation, use the coordinate system conversion to deduce the vertical line deviation and the gravity gradient level Correspondence between tensors. This method establishes the corresponding relationship between the gravity gradient horizontal tensor and the vertical line deviation, and uses the gravity gradient horizontal tensor data measured in real time by the gravity gradiometer to obtain the vertical line deviation in real time. Compared with the conventional vertical line deviation measurement method, this method can realize vertical line deviation. The linear deviation can be calculated accurately in real time, without relying on astronomical and satellite navigation data, and has independent measurement capabilities.

Description

technical field [0001] The invention relates to the technical field of gravity measurement, in particular to a method for real-time calculation of vertical line deviation based on horizontal tensor gravity gradient. Background technique [0002] In geometric geodesy, the geodetic ellipsoid is used as the horizontal reference to project the observation data onto the surface for calculation. The direction of the plumb line on the ellipsoid is defined as the direction of gravity. If the mass distribution of the earth is uniform, the normal of each point on the ellipsoid is consistent with the direction of the plumb line. However, the mass distribution of the earth is not uniform, and the direction of the vertical line at each point on the geodetic ellipsoid deviates from the normal direction. The vertical line deviation is the difference between the vertical line of the geoid and the normal direction of the reference ellipsoid. The sum direction does not change according to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C15/00G01V7/06
CPCG01C15/00G01V7/06
Inventor 孟兆海李鹏飞李中杨晔李晓平高巍
Owner TIANJIN NAVIGATION INSTR RES INST
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