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Satellite gravity inversion method based on two-star energy interpolation principle

A satellite gravity inversion and interpolation technology, applied in the measurement of gravitational field, measurement device, geophysical measurement, etc., can solve the problems of reduced calculation amount and higher accuracy of satellite speed measurement.

Inactive Publication Date: 2013-06-05
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 observation equation is clear and it is easy to analyze the sensitivity of the earth's gravity field. The amount of calculation is greatly reduced under the premise of ensuring the accuracy of the solution. Usually, a PC computer can be used to complete the fast solution of the high-order earth's gravity field; the disadvantage is that the speed of the satellite is limited. Higher measurement accuracy requirements

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  • Satellite gravity inversion method based on two-star energy interpolation principle
  • Satellite gravity inversion method based on two-star energy interpolation principle
  • Satellite gravity inversion method based on two-star energy interpolation principle

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Embodiment Construction

[0066] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0067] The satellite gravity inversion method based on the new double-star energy interpolation principle includes the following steps:

[0068] Step 1: Preprocessing of satellite observation data

[0069] 1.1 Collect the inter-satellite distance data ρ obtained by the space-borne K-band measuring instrument 12

[0070] (1) Based on the t-test criterion (Romanowski criterion), the gross errors existing in the inter-satellite distance data are effectively eliminated;

[0071] (2) Based on the 9th order Lagrange polynomial, interpolation obtains intermittent inter-satellite distance data.

[0072] 1.2 Collect the satellite orbital position data r and orbital velocity data from the satellite-borne dual-frequency GPS receiver

[0073] (1) In order to ensure the accuracy and continuity of orbit data, effectively remove the overla...

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Abstract

The invention relates to the field of interleaving techniques such as satellite geodesy, geophysics, space science and the like, and provides a satellite gravity inversion method based on a two-star energy interpolation principle. In the method, the global gravity field is accurately and rapidly inverted by introducing high-accuracy inter-satellite distance interpolation of a satellite-loaded K waveband measuring instrument into two-star relative orbits kinetic energy and further establishing a two-star energy interpolation observation equation. The method has the advantages of high satellitegravity inversion accuracy, definite physical meanings of the observation equation, contribution to error analysis of a gravity satellite system, easiness for sensing high-frequency gravity field signals and low requirement on the computer performance. The sensing accuracy of a 120-step GRACE earth gravity field can be increased substantively, so that the two-star energy interpolation principle method provided by the invention is an effective method for establishing a new generation high-accuracy and high-space-resolution global gravity field model.

Description

1. Technical field [0001] The present invention relates to intersecting technical fields such as satellite geodesy, geophysics, and space science, and in particular relates to a method for overcoming the relatively low accuracy of dynamic orbit determination of the current Global Navigation Satellite System (GNSS), by using K The high-precision inter-satellite distance observation value of the band measuring instrument introduces the binary star relative orbital kinetic energy item, and establishes a new type of binary star energy interpolation observation equation based on the interpolation principle, and then accurately and quickly inverts the method of the global gravity field. 2. Background technology [0002] The realization of satellite gravity measurement technology is another innovation and breakthrough in the field of geodesy after the successful construction of the GPS constellation in the United States. Instead, it uses satellite tracking satellite technology (SST...

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Application Information

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Patent Type & Authority Patents(China)
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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