A Fusion Model for ERP Considering Boundary Constraints and Inner Constraints

ZENG Anmin; ZHANG Qi; SUN Zhongmiao

doi:10.13203/j.whugis20180155

Volume 44 Issue 12

Dec. 2019

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Geomatics and Information Science of Wuhan University > 2019 > 44(12): 1771-1777. > DOI: 10.13203/j.whugis20180155

ZENG Anmin, ZHANG Qi, SUN Zhongmiao. A Fusion Model for ERP Considering Boundary Constraints and Inner Constraints[J]. Geomatics and Information Science of Wuhan University, 2019, 44(12): 1771-1777. DOI: 10.13203/j.whugis20180155

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A Fusion Model for ERP Considering Boundary Constraints and Inner Constraints

ZENG Anmin^{1, 2, 3,},
ZHANG Qi^{1, 3},
SUN Zhongmiao^{1, 2, 3}

1.
State Key Laboratory of Geo-information Engineering, Xi'an 710054, China
2.
Xi'an Research Institute of Surveying and Mapping, Xi'an 710054, China
3.
School of Geological and Surveying Engineering, Chang'an University, Xi'an 710054, China

Funds:

The National Natural Science Foundation of China 41474015

The National Natural Science Foundation of China 41874016

The National Natural Science Foundation of China 41604013

the National Key Research and Development Program of China 2016YFB0501701

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Author Bio:
ZENG Anmin, PhD, associate professor, specializes in the theories and methods of geodesy data processing and terrestrial reference frame. E-mail:zeng_anmin@163.com
Received Date: September 23, 2018
Published Date: December 04, 2019

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Abstract

Abstract

The ERP (Earth rotation parameters) obtained by different technologies and different analysis centers are often different. In order to provide unified ERP for users, it is often necessary to fuse the ERP by using a special method. In this paper, an additional boundary constraints and internal constraints fusion model based on the ERP results of multi-analysis center is proposed. Firstly, all the analysis center results are converted to the same time by using the parameter transformation model and the boundary constraints are applied to the same characteristic points on the boundary point of the adjacent observation period. Then the inner constraints of the transformation parameters are applied to the long-term solutions of the analysis centers, and the fusion solutions of the ERP are obtained. Using SINEX (solution independemt exchange format) files from seven GNSS (Global Navigation Satellite System) analysis centers of six years from 2005 to 2011, their results are integrated and analyzed. Compared with the results of IERS C04 (International Earth Rotation and Reference Systems Service Combined 04), the results of the fusion method proposed in this paper have been significantly improved.
- Earth rotation parameters (ERP),
- fusion model,
- boundary constraint,
- inner constraint

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References

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A Fusion Model for ERP Considering Boundary Constraints and Inner Constraints

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