Non-singular calculation method for vertical components of external disturbing gravity of flow points in sea area
A technology of external disturbance and calculation method, which is applied in the field of ocean gravity to achieve the effect of high-precision calculation
Active Publication Date: 2018-08-07
THE CHINESE PEOPLES LIBERATION ARMY 92859 TROOPS
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[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, to propose a non-singularity calculation method for the vertical component of the external disturbance gravitational force of the sea area flow point, and to solve the singularity problem existing in the calculation of the external disturbance gravitational vertical component of the sea area flow point based on the surface method
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[0015] The present invention is described in further detail below by way of examples.
[0016] A non-singular calculation method for the vertical component of the external disturbance gravitational force of the floating point in the sea area, comprising the following steps:
[0017] Step 1. Using the local integral domain identity transformation to realize the non-singularity calculation of the vertical component of the external disturbance gravitational force of the grid points in the sea area. The specific implementation method is:
[0018] The integral formula for calculating the vertical component of the earth’s external disturbance gravitational force using the surface layer method is:
[0019]
[0020] in:
[0021]
[0022]
[0023] r=R+h
[0024] In the formula, T p Compute the perturbation bit at point P for the external space; and Represent the geocentric radius, geocentric latitude, and geocentric longitude of the calculation point and the spherica...
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The invention relates to a non-singular calculation method for vertical components of external disturbing gravity of flow points in a sea area. The method is characterized in that a local integral domain identity transformation is used for achieving non-singular calculation of the vertical components of external disturbing gravity of the flow points in the sea area; the local integral domain identity transformation and an interpolation method are combined to achieve the non-singular calculation of the vertical components of the external disturbing gravity of non-grid points in the sea area. The method aims at an inherent defect that singularity exists when a surface layer method is used for calculating the vertical components of the outer disturbing gravity of the flow points in the sea area, introduces the local integral domain identity transformation and the non-grid point interpolation method to establish a non-singular calculation model of the vertical components of the external disturbing gravity of the flow points in the sea area, and effectively obtains the vertical components of the external disturbing gravity of the flow points of the sea area; experiments show that the method can achieve high-precision calculation of the vertical components of the external disturbing gravity of the flow points in the sea area, and meet the actual demands for rapid assignment of the vertical components of the external disturbing gravity of the whole sea and full height sections.
Description
technical field [0001] The invention belongs to the technical field of marine gravity, in particular to a non-singularity calculation method for the vertical component of external disturbance gravitational force at flow points in the sea area. Background technique [0002] The calculation of the vertical component of gravitational force of external disturbance in sea area has very important application value in geodesy and space science and technology research, artificial satellite and various spacecraft flight support. The surface method model has the characteristics of simple mathematical structure of the kernel function and easy to meet the requirements of input data guarantee. It is widely used in the calculation of the vertical component of the external disturbance gravitational force of the floating point in the sea area. However, the surface method has the problem of integral singularity in ultra-low altitude calculations. . Contents of the invention [0003] The p...
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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 邓凯亮黄谟涛陈欣吴太旗陆秀平黄辰虎张博
Owner THE CHINESE PEOPLES LIBERATION ARMY 92859 TROOPS