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Satellite gravity gradient retrieval method based on filtering principle

A gravity gradient and satellite technology, which is applied in the cross field, can solve the problems of not considering the contribution of the satellite gravity gradient cross tensor, and the inversion accuracy of the earth's gravity field does not meet the expected requirements, achieving fast calculation speed, low performance requirements, and inversion. high precision effect

Inactive Publication Date: 2013-06-19
INST OF GEODESY & GEOPHYSICS CHINESE ACADEMY OF SCI
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Problems solved by technology

Because this method does not consider the contribution of the satellite gravity gradient cross tensor, and does not effectively filter the satellite gravity gradient observation data, the accuracy of the Earth's gravity field retrieval has not yet met the expected requirements

Method used

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  • Satellite gravity gradient retrieval method based on filtering principle
  • Satellite gravity gradient retrieval method based on filtering principle
  • Satellite gravity gradient retrieval method based on filtering principle

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Embodiment Construction

[0029] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0030] The satellite gravity gradient inversion method based on filtering principle includes the following steps:

[0031] Step 1: Gravity gradient satellite observation data collection

[0032] (1) Collect satellite gravity gradient full tensor observation data (V xx ,V yy ,V zz ,V xy ,V xz ,V yz ).

[0033] (2) Observation data r of the satellite orbit position is collected through the on-board GPS / GLONASS composite receiver of the gravity gradient satellite.

[0034] Step 2: Filter satellite gravity gradient observation model establishment

[0035] In the ground-fixed system, the expression of the earth disturbance potential expanded according to the spherical harmonic function is

[0036] T ( r , θ , λ ) ...

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Abstract

The invention relates to a precision measurement method of an earth gravitational field, in particular to a satellite gravity gradient retrieval method based on the filtering principle. A novel satellite gravity gradient observation equation is set through the filtering principle, and then accurately and rapidly inverts the earth gravitational field. The satellite gravity gradient retrieval method based on the filtering principle is high in inversion accuracy, is high in calculation speed of the earth gravitational field, carries out sensitivity analysis of a satellite gravity gradient system easily, is definite in physical meanings of the satellite observation equation, and has low requirements for computer performance, thereby being an effective method for calculating the high-accuracy and high-spatial-resolution earth gravitational field.

Description

technical field [0001] The present invention relates to interdisciplinary technical fields such as satellite gravity gradients, space geodesy, geophysics, aerospace, etc., and in particular to a method for establishing a new type of satellite gravity gradient observation equation through filtering principles, and then accurately and quickly inverting the earth's gravity field method. Background technique [0002] The earth's gravitational field and its time-varying reflect the spatial distribution, movement and change of the earth's surface and internal 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-varying The needs of seismology, oceanography, space science, national defense construction, etc. will also provide important information resources for all human beings to seek resources, protect the environment and predict disasters. [0003] GOCE (Gravi...

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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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