引用本文: 张利明, 李斐, 郝卫峰, 柯宝贵, 章传银. 利用GNSS/重力法确定南极中山站高程基准的垂直偏差[J]. 武汉大学学报 ( 信息科学版), 2021, 46(4): 497-502.
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.
 Citation: 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.

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

• 摘要: 南极蕴含着无数科学之谜和资源信息，已成为科学研究的热点区域之一。许多国家和组织争相在南极建立科考站，由于缺乏统一的高程基准，一切与高程相关的信息都无法精确确定和统一。充分利用GNSS大地边值问题不受局部高程基准限制的特点，在概述GNSS/重力法的基本原理和方法基础上，利用收集的南极中山站GNSS/水准、重力等数据，基于EGM2008和EIGEN-6C4两种地球重力场模型分别计算了南极中山站高程基准相对于国家1985高程基准的垂直偏差。结果表明，南极中山站高程基准与全球高程基准的垂直偏差为-1.455 m，与国家1985高程基准的垂直偏差为-1.759 m，这将为南极测绘地理信息提供更为精确的全球尺度高程基准参考，对更加精确预测南极冰川消融对低海拔地区造成的影响具有重要价值。

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.

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