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Method for inverting earth gravitational field by using variance-covariance diagonal tensor principle

A technology of diagonal tensor and earth gravity, applied in the measurement of gravitational field, geophysical measurement, measurement device, etc., to achieve the effect of low computer performance requirements, high inversion accuracy, and clear physical meaning

Inactive Publication Date: 2013-05-01
INST OF GEODESY & GEOPHYSICS CHINESE ACADEMY OF SCI
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Problems solved by technology

The advantage is that the physical meaning of the satellite observation equation is clear, it is easy to analyze the error and can quickly solve the high-order earth's gravity field; the disadvantage is that different degrees of approximation are made when the satellite observation equation model is established

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  • Method for inverting earth gravitational field by using variance-covariance diagonal tensor principle
  • Method for inverting earth gravitational field by using variance-covariance diagonal tensor principle
  • Method for inverting earth gravitational field by using variance-covariance diagonal tensor principle

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Embodiment Construction

[0026] In order to make it easier for those skilled in the art to understand and implement the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] The method of inverting the earth's gravity field by using the satellite gravity gradient variance-covariance diagonal tensor principle includes the following steps:

[0028] Step 1: Data Acquisition of the Gravity Gradient Satellite

[0029] Acquisition of satellite gravity gradient measurement data δV by the on-board gravity gradient meter of the gravity gradient satellite xyz .

[0030] Step 2: Establish a variance-covariance diagonal tensor error model and invert the cumulative geoid error

[0031] 2.1) Establish satellite gravity gradient variance-covariance diagonal tensor model based on satellite gravity gradient measurement data

[0032] In the ground-solid system, the expression of the earth's gravitational pot...

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Abstract

The invention relates to a method for precisely measuring the earth gravitational field, in particular to a method for inverting the earth gravitational field by using a variance-covariance diagonal tensor principle. The method comprises the following steps of: establishing a cumulative geoidal surface error model on the basis of satellite gravity gradient variance-covariance diagonal tensor principle; accurately and rapidly inverting the earth gravitational field by using the satellite gravity gradient measurement data of a spaceborne gravity gradiometer; and developing requirement argumentation on a GOCE (Gravity Field and Steady-State Ocean Circulation Explorer)-II satellite gravity gradient system by using the satellite orbit altitude and the precision index of the satellite gravity gradiometer. The method disclosed by the invention is high in inversion precision of the earth gravitational field, high in inversion speed of the satellite gravity gradient, explicit in physical content of a satellite observation equation, capable of easily developing the requirement analysis of the satellite gravity gradient system and low in requirement on computer performances. Therefore, the method for inverting the earth gravitational field by using the variance-covariance diagonal tensor principle is an effective method for resolving the earth gravitational field with high precision and high spatial resolution.

Description

technical field [0001] The present invention relates to satellite gravity gradient science, space geodesy, geophysics, astronautics and other interdisciplinary technical fields, in particular to a cumulative geoid error model based on the satellite gravity gradient variance-covariance diagonal tensor principle, And use the satellite orbit altitude and satellite gravity gradiometer accuracy index to carry out the research method of GOCE-II satellite gravity gradient system requirement demonstration. Background technique [0002] The earth's gravitational field and its time variation reflect the spatial distribution, movement and change of the earth's surface and interior materials, and at the same time determine the fluctuation and change of the geoid. Therefore, determining the fine structure of the Earth's gravitational field and its time-variation is not only a requirement for satellite geodesy, oceanography, seismology, space science, national defense construction, etc., ...

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Application Information

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IPC IPC(8): G01V7/00
Inventor 不公告发明人
Owner INST OF GEODESY & GEOPHYSICS CHINESE ACADEMY OF SCI
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