Radial basis function grid method for constructing sea area vertical line deviation model based on frequency domain characteristics

A technology of vertical line deviation and frequency domain characteristics, applied in the field of radial basis function grid method, can solve the problem of low interpolation accuracy of the algorithm

Inactive Publication Date: 2020-08-07
THE CHINESE PEOPLES LIBERATION ARMY 92859 TROOPS
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Problems solved by technology

However, the radial basis function interpolation algorithm only considers the spatial attributes between the estimated point and the observed point, and the interpolation accuracy of the algorithm is low

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  • Radial basis function grid method for constructing sea area vertical line deviation model based on frequency domain characteristics
  • Radial basis function grid method for constructing sea area vertical line deviation model based on frequency domain characteristics
  • Radial basis function grid method for constructing sea area vertical line deviation model based on frequency domain characteristics

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] A radial basis function grid method for constructing a sea area vertical line deviation model based on frequency domain characteristics, comprising the following steps:

[0034] Step 1. Use the medium and long-wave spectrum information provided by the global gravity field model to remove the vertical deviation in the ocean vertical deviation observations, and obtain the residual vertical deviation at the observation point.

[0035] The residual vertical line deviation at the observation point includes the residual value of the meridian component and the unitary component of the vertical line deviation at the observation point i. The formula for calculating the residual value of the meridian component and the unitary component of the vertical line deviation at observation point i is:

[0036]

[0037] In the formula, ξ i and η i is the actual meas...

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Abstract

The invention relates to a radial basis function grid method for constructing a sea area plumb line deviation model based on frequency domain characteristics, which is technically characterized by comprising the following steps of: removing plumb line deviation in a sea plumb line deviation observation value by utilizing medium-long wave frequency spectrum information provided by a global gravityfield model to obtain residual plumb line deviation at an observation point; based on the residual vertical line deviation at the observation point, applying a radial basis function interpolation algorithm to obtain the residual vertical line deviation at the point to be estimated; recovering the model values of the meridian component and the mortise unitary component residual error of the vertical line deviation of the to-be-estimated point to obtain the calculation values of the meridian component and the mortise unitary component residual error of the vertical line deviation of the to-be-estimated point at the to-be-estimated point. The method is reasonable in design, the ocean plumb line deviation observed value serves as basic data, the global gravity field spherical harmonic model iscombined, a radial basis function interpolation method based on frequency domain characteristics is adopted, and the high-precision and high-resolution sea area plumb line deviation model can be constructed.

Description

technical field [0001] The invention belongs to the field of marine surveying and mapping, in particular to a radial basis function grid method for constructing a vertical line deviation model in a sea area based on frequency domain characteristics. Background technique [0002] The vertical deviation of the sea area is an important part of the ocean gravity field information, and it is also the basic information necessary to ensure the precise navigation and positioning of the inertial navigation system. The time cost and economic cost of sea-air gravity measurement are very high, and it is impossible to quickly and economically obtain the gravity information that meets the resolution requirements of the inertial navigation system for precise navigation and positioning. It is of great scientific significance to seek a high-precision interpolation algorithm for the construction of the ocean vertical deviation model and application value. The radial basis function interpolat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/15G01C13/00
CPCG01C13/00G06F17/15Y02A90/10
Inventor 邓凯亮陈欣陆秀平熊雄王许覃昕垚张博
Owner THE CHINESE PEOPLES LIBERATION ARMY 92859 TROOPS
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