Method for building global gravitational field model by utilizing inter-satellite distance interpolation

A technology of gravity field model and intersatellite distance, which is applied in the field of establishing a global gravity field model by interpolation of intersatellite distance, which can solve problems such as high complexity of the solution process, reduced calculation amount, and large amount of calculation of observation data

Inactive Publication Date: 2012-01-04
INST OF GEODESY & GEOPHYSICS CHINESE ACADEMY OF SCI
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Problems solved by technology

The advantage of the orbital dynamics method is that the solution accuracy is higher; the disadvantage is that the observation data has a large amount of calculation, the solution process is more complicated, and high-performance parallel computer support is required to invert the higher-order gravity field; the advantage of the energy conservation method is that The physical meaning o...

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  • Method for building global gravitational field model by utilizing inter-satellite distance interpolation
  • Method for building global gravitational field model by utilizing inter-satellite distance interpolation
  • Method for building global gravitational field model by utilizing inter-satellite distance interpolation

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Embodiment Construction

[0067] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0068] The method of establishing the global gravity field model by interpolation of the interstellar distance includes the following steps, wherein the global gravity field model refers to the set of expansion coefficients of the earth's gravitational potential according to the spherical harmonic function

[0069] Step 1: Preprocessing the satellite observation data of GRACE (Gravity Recovery And Climate Experiment)

[0070] 1.1 Collect the inter-satellite distance ρ obtained by the space-borne K-band measuring instrument 12 data

[0071] (1) Based on the t-test criterion (Romanowski criterion), the gross errors existing in the inter-satellite distance data are effectively eliminated;

[0072] (2) Based on the 9th order Lagrange polynomial, interpolation obtains intermittent inter-satellite distance data.

[0073] 1.2 Collect the satellite orbit data ob...

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Abstract

The invention discloses a method for building a global gravitational field model by utilizing an inter-satellite distance interpolation. The method disclosed by the invention is as follows: an inter-satellite distance interpolation satellite observation equation is built through introducing the precise inter-satellite distance of a satellite-borne K waveband gauge into a star attachment componentof a double-star opposite rail position vector so as to build a global gravitational field model with high precision and high spatial resolution. The method has high satellite gravity inversion precision, explicit observation equation physical meaning and low computer performance requirement, is easy to sense medium and high frequency gravity field signals, and is favorable for the error analysisof the gravity satellite system.

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 of constructing The new intersatellite distance interpolation satellite observation equation, and then the technical field of quickly establishing a high-precision and high-spatial-resolution global gravity field model. 2. Background technology [0002] like figure 1 As shown, the gravity satellite moves around the earth in a near-circular polar orbit under the action of the earth's gravity field. If the orbit is determined accurately, the accurate parameters of the earth's gravity field must be known; Improve the accuracy of the Earth's gravity field parameters, and the two complement each other. In the field of geodesy, the earth's gravity field plays an important role in studying the shape of the earth and accurately determining the three-dimensional coordinates of ground control points; ...

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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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