Estimation of Displacements Caused by Ocean Tide Loading Using Improved GPS Kinematic Precise Point Positioning Technique: A Case Study in Hong Kong, China

ZHAO Hong; GUO Chunxi; CHENG Chuanlu; WANG Wenli; LIU Zhi; DONG Bo; WANG Jianwei

doi:10.13203/j.whugis20160519

Volume 44 Issue 3

Mar. 2019

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Geomatics and Information Science of Wuhan University > 2019 > 44(3): 355-363. > DOI: 10.13203/j.whugis20160519

ZHAO Hong, GUO Chunxi, CHENG Chuanlu, WANG Wenli, LIU Zhi, DONG Bo, WANG Jianwei. Estimation of Displacements Caused by Ocean Tide Loading Using Improved GPS Kinematic Precise Point Positioning Technique: A Case Study in Hong Kong, China[J]. Geomatics and Information Science of Wuhan University, 2019, 44(3): 355-363. DOI: 10.13203/j.whugis20160519

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Estimation of Displacements Caused by Ocean Tide Loading Using Improved GPS Kinematic Precise Point Positioning Technique: A Case Study in Hong Kong, China

1.
Center for Geodetic Data Processing, NASG, Xi'an 710054, China
2.
China Jikan Research Institute of Engineering Investigation and Design Co. Ltd, Xi'an 710043, China

Funds:

The National Natural Science Foundation of China 4157040313

The National Natural Science Foundation of China 41774004

Science and Technology Innovation Project of SHASM

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Author Bio:
ZHAO Hong, PhD, engineer, specializes in modelling ocean tide loading displacement. E-mail:zhaohong710@163.com
Received Date: April 24, 2017
Published Date: March 04, 2019

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Abstract

Abstract

Compared with very long baseline interferometry (VLBI) and superconducting gravimeter (SG) techniques, Global Positioning System (GPS) technique has the advantages of global high-resolution coverage, long-term continuous observations, and low environmental impact to determine the ocean tide loading (OTL) displacement, which can provide a technical means to establish the ocean tide models and theory significance and reference for studying the OTL effect. In order to establish the regional OTL displacement model, the GPS kinematic precise point positioning (PPP) was used to determine the OTL displacement parameters. Three-dimensional ocean tide loading displacements of eight constituents at 11 sites in Hong Kong with eight years of continuous GPS observations are estimated. Comparing the RMS misfit of the model values, we found that the accuracy of K₂ and K₁ constituents are worst and the others' RMS are smaller than 2 mm. Comparing our results with the kinematic PPP and static PPP results, we found that our improved kinematic PPP can significantly improve the accuracy of K₁ constituent. And the accuracy of 8 constituents derived by our method can reach the same accuracy as the kinematic PPP results, for K₁ constituent, the accuracy of our method results is slightly better than the kinematic PPP results. Finally, using the least square quasi method to establish the GPS regional OTL displacement model can provide the reference for OTL effect correction in the coastal area which are lack of high accuracy local tide model.
- GPS,
- ocean tide loading (OTL),
- kinematic precise point positioning,
- regional OTL displacement model

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References

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Estimation of Displacements Caused by Ocean Tide Loading Using Improved GPS Kinematic Precise Point Positioning Technique: A Case Study in Hong Kong, China

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