极地研究

极地研究 ›› 2007, Vol. 18 ›› Issue (2-English): 155-160.

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The absolute gravity measurement by FG5 gravimeter at Great Wall Station, Antarctica

 Zhang Shengkai1,2, E Dongchen1,2, He Zhitang3, Wang Zemin1,2, Yang Yuande1,2 and Zhang Shiwei3   

  1. 1 Chinese Antarctic Center of Surveying and Mapping, SGG, Wuhan University, Wuhan 430079, China;
    2 Key Laboratory of Polar Surveying and Mapping, SBSM, Wuhan 430079, China;
    3 Shanxi Bureau of Surveying and Mapping, Xi'an 710054, China
  • 出版日期:1957-06-30 发布日期:1957-06-30
  • 通讯作者: Zhang Shengkai

The absolute gravity measurement by FG5 gravimeter at Great Wall Station,Antarctica

 Zhang Shengkai1,2, E Dongchen1,2, He Zhitang3, Wang Zemin1,2, Yang Yuande1,2 and Zhang Shiwei3   

  1. 1 Chinese Antarctic Center of Surveying and Mapping, SGG, Wuhan University, Wuhan 430079, China;
    2 Key Laboratory of Polar Surveying and Mapping, SBSM, Wuhan 430079, China;
    3 Shanxi Bureau of Surveying and Mapping, Xi'an 710054, China
  • Online:1957-06-30 Published:1957-06-30
  • Contact: Zhang Shengkai

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摘要：

Gravity measurement is of great importance to the height datum in Antarctica. The absolute gravity measurement was carried out at Great Wall Station, Antarctica, using FG5 absolute gravity instrument. The gravity data was processed with corrections of earth tide, ocean tide, polar motion and the atmospher, and the RMS is within ±3×10-8 ms-2. The vertical and horizontal gravity gradients were measured using 2 LaCoaste & Romberg (LCR) gravimeters. The absolute gravity measurement provides the fundamental data for the validation and calibration of the satellite gravity projects such as CHAMP, GRACE and GOCE, and for the high accuracy geoid model.

关键词: absolute gravimetry, gravity gradients, Antarctica

Abstract:

Gravity measurement is of great importance to the height datum in Antarctica. The absolute gravity measurement was carried out at Great Wall Station, Antarctica, using FG5 absolute gravity instrument. The gravity data was processed with corrections of earth tide, ocean tide, polar motion and the atmospher, and the RMS is within ±3×10-8 ms-2. The vertical and horizontal gravity gradients were measured using 2 LaCoaste & Romberg (LCR) gravimeters. The absolute gravity measurement provides the fundamental data for the validation and calibration of the satellite gravity projects such as CHAMP, GRACE and GOCE, and for the high accuracy geoid model.

Key words: absolute gravimetry, gravity gradients, Antarctica