极地研究

极地研究 ›› 2000, Vol. 11 ›› Issue (1-English): 1-8.

• 目次 •    下一篇

Determination of Antarctic geoid by using global gravity field

 Chen Chunming and Li Jiancheng   

  1. Antarctic Surveying and Mapping Center of China, Wuhan Technical University of Surveying and Mapping, Wuhan 430070, China
  • 出版日期:1950-03-30 发布日期:1950-03-30
  • 通讯作者: Chen Chunming

Determination of Antarctic geoid by using global gravity field

Chen Chunming and Li Jiancheng   

  1. Antarctic Surveying and Mapping Center of China, Wuhan Technical University of Surveying and Mapping, Wuhan 430070, China
  • Online:1950-03-30 Published:1950-03-30
  • Contact: Chen Chunming

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摘要：

With Chinese latest global gravity field model WDM94, the authors provide the geoid height and mean free air gravity anomaly of Antarctica (The range of latitude is from -60° to -90°). In order to conclude and analyze the characters of Antarctic geoid roundly, the authors collect the latest oversea global gravity field model OSU91 (to degree and order 360) and JGMOSU (to degree and order 360), get the corresponding geoid height and mean free air gravity anomaly. The results are compared with the results got from WDM94, thus we get the difference. The standard deviation of geoid height between WDM94 and OSU91 is ±1.90 m;the deviation of geoid between WDM94 and JGMOSU is ±2.09 m. The standard deviation of mean gravity anomaly are ±8.97 mGal and ±9.32 mGal respectively.

关键词: Antarctica, geoid, gravity anomaly, gravity field model

Abstract:

With Chinese latest global gravity field model WDM94, the authors provide the geoid height and mean free air gravity anomaly of Antarctica (The range of latitude is from -60° to -90°). In order to conclude and analyze the characters of Antarctic geoid roundly, the authors collect the latest oversea global gravity field model OSU91 (to degree and order 360) and JGMOSU (to degree and order 360), get the corresponding geoid height and mean free air gravity anomaly. The results are compared with the results got from WDM94, thus we get the difference. The standard deviation of geoid height between WDM94 and OSU91 is ±1.90 m;the deviation of geoid between WDM94 and JGMOSU is ±2.09 m. The standard deviation of mean gravity anomaly are ±8.97 mGal and ±9.32 mGal respectively.

Key words: Antarctica, geoid, gravity anomaly, gravity field model