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Satellite gravity inversion method based on inter-satellite velocity interpolation principle

A satellite gravity inversion and inter-satellite technology, applied in the cross field, can solve the problems of loss of low-frequency earth gravity field accuracy, reduction of calculation amount, etc., and achieve the effect of low computer performance requirements, easy analysis, and high inversion accuracy

Inactive Publication Date: 2012-01-11
INST OF GEODESY & GEOPHYSICS CHINESE ACADEMY OF SCI
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Problems solved by technology

The intersatellite acceleration method is suitable for determining the gravitational field of the GRACE binary star Earth. The advantages are that the observation equation is simple, the physical meaning is clear, the sensitivity analysis of the gravitational field is easy, and the calculation amount is greatly reduced under the premise of ensuring the accuracy of the solution. It can usually be completed by a PC computer Fast solution for high-order gravitational fields; the disadvantage is that the numerical differentiation algorithm used loses the accuracy of the low-frequency Earth's gravitational field to a certain extent

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  • Satellite gravity inversion method based on inter-satellite velocity interpolation principle
  • Satellite gravity inversion method based on inter-satellite velocity interpolation principle
  • Satellite gravity inversion method based on inter-satellite velocity interpolation principle

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Embodiment Construction

[0022] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0023] The satellite gravity retrieval method based on the principle of intersatellite velocity interpolation includes the following steps:

[0024] Step 1: Obtain GRACE-type satellite observation data

[0025] 1.1 Collect the inter-satellite velocity obtained by the space-borne K-band measuring instrument data

[0026] (1) Based on the t-test criterion (Romanowski criterion), the gross errors existing in the intersatellite velocity data are effectively eliminated;

[0027] (2) Based on the 9th-order Lagrange polynomial, the intermittent intersatellite velocity data is obtained by interpolation. 1.2 Collect the satellite orbital position r and orbital velocity obtained by the satellite-borne dual-frequency GPS receiver data

[0028] (1) In order to ensure the accuracy and continuity of satellite orbit data, effectively remo...

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Abstract

The invention relates to a precise measuring method of an earth gravity field, in particular to a satellite gravity inversion method based on an inter-satellite velocity interpolation principle; an inter-satellite velocity interpolation observation equation is established by leading high-precision inter-satellite velocity into a satellite-satellite link component of the relative orbital velocity vector of double satellites, so as to precisely and quickly invert the earth gravity field; the method has high satellite gravity inversion precision, so that the physical meaning of the satellite observation equation is clear, the gravity satellite system sensitivity analysis is easy, the exploration of gravity field signals in medium and short wave is favorable, and the requirement on computer performance is low; and an inter-satellite velocity interpolation method is an effective method for resolving the earth gravity field with high precision and high spatial solution.

Description

1. Technical field [0001] The present invention relates to intersecting technical fields such as satellite geodesy, geophysics, and space science, and in particular to a star connection component by introducing the high-precision inter-satellite velocity of the GRACE-type satellite K-band measuring instrument into the star-connection component of the relative orbital velocity vector of the double star Establish a new type of interstellar velocity interpolation observation equation, and then accurately and quickly invert the method of the earth's gravity field. 2. Background technology [0002] Such as figure 1 As shown, the earth's gravitational field and its changes over time reflect the spatial distribution, movement and changes 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 fo...

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Application Information

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IPC IPC(8): G01V7/00
Inventor 郑伟许厚泽熊熊钟敏刘成恕
Owner INST OF GEODESY & GEOPHYSICS CHINESE ACADEMY OF SCI
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