Vertical Deviation Determination of Height Datum in Zhongshan Station Using GNSS/Gravity Method

ZHANG Liming; LI Fei; HAO Weifeng; KE Baogui; ZHANG Chuanyin

doi:10.13203/j.whugis20190198

Volume 46 Issue 4

Apr. 2021

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Geomatics and Information Science of Wuhan University > 2021 > 46(4): 497-502. > DOI: 10.13203/j.whugis20190198

ZHANG Liming, LI Fei, HAO Weifeng, KE Baogui, ZHANG Chuanyin. Vertical Deviation Determination of Height Datum in Zhongshan Station Using GNSS/Gravity Method[J]. Geomatics and Information Science of Wuhan University, 2021, 46(4): 497-502. DOI: 10.13203/j.whugis20190198

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Vertical Deviation Determination of Height Datum in Zhongshan Station Using GNSS/Gravity Method

1.
Chinese Academy of Surveying and Mapping, Beijing 100830, China
2.
Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China

Funds:

The National Natural Science Foundation of China 41574004

The National Natural Science Foundation of China 41531069

The National Natural Science Foundation of China 41874022

Science and Technology Innovation Talents Training Project(Youth Talents), Ministry of Natural Resources

the National Key Research and Development Program of China 2017YFA0603102

Key Project of Scientific and Technological Cooperation of Guizhou Province [2017]3005-3

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Author Bio:
ZHANG Liming, PhD, professor, specializes in Earth gravitation field and the unification of global height datum. E-mail: zhanglm@casm.ac.cn
Corresponding author:
HAO Weifeng, PhD, associate professor. E-mail: haowf@whu.edu.cn
Received Date: April 09, 2020
Published Date: April 04, 2021

Graphical Abstract

Abstract

Abstract

Objective There are innumerable scientific mysteries and resources in Antarctica, which has been one of the research hotspots. Many countries and organizations are competing to establish scientific research stations in Antarctica. However, due to the lack of a unified height datum, all height-related information can not be accurately identified and unified. We attempt to determinate the vertical deviation between height datum of Zhongshan Station and Chinese1985 height datum.
Methods Global navigation satellite system(GNSS) geodetic boundary value problem is not restricted by local height datum, which facilitates the unification of global datum. First, the basic principles and methods of GNSS/gravity method are summarized. Then, the data of GNSS/leveling and gravity of Zhongshan Station in Antarctica are collected and introduced. Finally, the vertical deviation between the height datum of Zhongshan Station in Antarctica and Chinese1985 height datum can be calculated by two gravity field models of EGM2008 and EIGEN-6C4.
Results The vertical deviation between the height datum of Zhongshan Station in Antarctica and the global height datum is -1.455 m. The vertical deviation between the height datum of Zhongshan Station in Antarctica and Chinsese1985 height datum is -1.759 m.
Conclusions This work will provide more accurate global elevation benchmarks for Antarctic information of surveying, mapping and geographic.It is of great value for more accurate prediction of the impact of Antarctic glacier melting on low elevation areas.
- Antarctica,
- geodetic boundary value problem,
- GNSS/gravity method,
- gravity quasi-geoid,
- unification of height datum

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Vertical Deviation Determination of Height Datum in Zhongshan Station Using GNSS/Gravity Method

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