朱耀仲. 重力场长周期变化的观测与理论结果比较[J]. 武汉大学学报 ( 信息科学版), 2001, 26(6): 539-543.
引用本文: 朱耀仲. 重力场长周期变化的观测与理论结果比较[J]. 武汉大学学报 ( 信息科学版), 2001, 26(6): 539-543.
ZHU Yaozhong. Comparison of Observed and Predicted Long-period Changes in the Earth's Gravity Field[J]. Geomatics and Information Science of Wuhan University, 2001, 26(6): 539-543.
Citation: ZHU Yaozhong. Comparison of Observed and Predicted Long-period Changes in the Earth's Gravity Field[J]. Geomatics and Information Science of Wuhan University, 2001, 26(6): 539-543.

重力场长周期变化的观测与理论结果比较

Comparison of Observed and Predicted Long-period Changes in the Earth's Gravity Field

  • 摘要: 利用Chandler摆动周期作为约束,估计了地幔滞弹性对地球二阶带谐响应系数κ、带谐位系数J2和卫星轨道升交点Ω的影响,理论预测的长周期潮汐参数被用来与人卫激光测距(SLR)观测结果进行比较。结果表明,SLR确定的长周期潮汐解已能检测到地幔滞弹性的影响。考虑地幔滞弹性和非平衡海洋潮汐效应后,理论预测的18.6a潮汐参数与SLR潮汐解基本相符。

     

    Abstract: The differences between two groups of survey values for crossing points are only used to check and evaluate the quality of observations in marine survey-line net,but have not been used to correct or adjust errors of observation yet.In this paper,the structure of systematic and random error in marine survey net is discuessed in details and the adjustment method of observations for marine survey net is studied.Based on the survey-line systematic error model,the formula of the rank-defect adjustment model are deduced according to the modern adjustment theory.An example of calculations using real observed data is carried out to demonstrate the effectiveness of this adjustment model.Moreover,the semi-systematic error correction method used now in marine gravity survey in China only is a special case of the adjustment model in this paper.

     

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