Satellite-borne accelerometer data calibrating method based on dual-satellite adjacent energy difference principle

An accelerometer and energy difference technology, applied in cross-fields, can solve the problems of large amount of calculation of observation data, high complexity of the solution process, and low calibration accuracy

Inactive Publication Date: 2012-01-18
INST OF GEODESY & GEOPHYSICS CHINESE ACADEMY OF SCI
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Problems solved by technology

(1) Kinetic calibration method: the advantage is that the data calibration accuracy of the spaceborne accelerometer is high; the disadvantage is that the observation data has a large amount of computation, the solution process is more complicated, and it needs the support of a high-performance parallel computer
(2) Single-satellite energy conservation calibration method: the advantage is that the physical meaning of the observation equation is clear; the disadvantage is that it is only suitable for calibrating the accelerometer data of a single gravity satellite such as CHAMP, and the calibration accuracy is relatively low

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  • Satellite-borne accelerometer data calibrating method based on dual-satellite adjacent energy difference principle
  • Satellite-borne accelerometer data calibrating method based on dual-satellite adjacent energy difference principle
  • Satellite-borne accelerometer data calibrating method based on dual-satellite adjacent energy difference principle

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Embodiment Construction

[0051] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0052] The accurate calibration method of space-borne accelerometer data based on the principle of new double-star adjacent energy difference includes the following steps:

[0053] Step 1: Effective preprocessing of satellite data

[0054] 1.1 Collect the orbit data obtained by the dual-frequency GPS receiver

[0055] (1) In order to ensure the accuracy and continuity of orbit data, effectively remove the overlapping period of satellite orbits, and then complete the splicing of orbit data;

[0056] (2) Effectively cut off the data with lower accuracy at the beginning and end of the satellite orbit data due to the weak constraints of orbit determination;

[0057] (3) Based on the 3σ criterion (Leiter criterion), the gross errors existing in the orbit data are effectively eliminated.

[0058] 1.2 Collect the inter-satellite veloc...

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Abstract

The invention relates to a satellite-borne accelerometer nonconservative force data accurate calibrating method based on a novel dual-satellite adjacent energy difference principle in the technical field of crossing of satellite geodesy, geophysics, space science and the like. The satellite-borne accelerometer nonconservative force data accurate calibrating method comprises the steps of: on the basis of establishing a reference disturbing potential-free dual-satellite disturbing potential difference observation equation, by using priori information of a global gravitational field model, establishing a novel dual-satellite adjacent energy difference observation equation on the basis of the dual-satellite adjacent energy difference principle, and fitting a scale factor and an offset factor of calibration parameters so that satellite-borne accelerometer nonconservative force data is accurately calibrated. The method has high calibration precision and is suitable for rapid calibration of single-satellite and dual-satellite accelerometer data, thus earth gravitational field inversion precision can be effectively enhanced.

Description

1. Technical field [0001] The present invention relates to satellite geodesy, geophysics, space science and other interdisciplinary technical fields, in particular to a priori information of the global gravity field model, based on the principle of new double star adjacent energy difference to measure the non-conservative force of the on-board accelerometer methods for accurate calibration of data. 2. Background technology [0002] The 21st century is a new era in which human beings use satellite tracking satellite (SST) and satellite gravity gradient (SGG) technologies to improve their cognition of "digital earth". like figure 1 As shown, the successive successful launches of gravity satellites CHAMP (Challenging Minisatellite Payload), GRACE (Gravity Recovery and Climate Experiment) and GOCE (Gravity Field and Steady-State Ocean Circulation Explorer) indicate that mankind will usher in an unprecedented high-precision satellite gravity The era of detection technology. Th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P21/00
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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