| 远区重力数据对扰动位径向二阶梯度的影响 |
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| 引用本文： | 赵东明,吴晓平.远区重力数据对扰动位径向二阶梯度的影响[J].测绘学院学报,2001,18(1):16-19. |
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| 作者姓名： | 赵东明 吴晓平 |
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| 作者单位： | 信息工程大学测绘学院!河南郑州450052 |
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| 摘 要： | 提出了利用地面重力异常数据计算地面扰动位径向二阶梯度时，远距离带区影响的误差公式，结果以级数形式给出，以其数学模型为基础，利用全球重力位模型GPM98，计算确定了不同平均异常网格大小情况下截断半径取一系列值时的远区影响，在将卫星重力梯度和航空重力梯度观测数据与地面重力数据进行联合处理时，文中提出了远区影响的数量关系，对于确定合理的截断半径大小具有一定的参考价值。
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| 关 键 词： | 扰动位径向二阶梯度 远区影响 截断半径 数学模型 地面重力测量 重力梯度 |
The Influence of Zones Outside of a Cap on the Second Derivative of Disturbing Potential |
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| ZHAO Dong min,WU Xiao ping.The Influence of Zones Outside of a Cap on the Second Derivative of Disturbing Potential[J].Journal of Institute of Surveying and Mapping,2001,18(1):16-19. |
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| Authors: | ZHAO Dong min WU Xiao ping |
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| Abstract: | A method to assess the influence of mean gravity anomalies outside of a cap on the surface of the earth on the second derivative of disturbing potential is developed and evaluated in a series formula. Then, based on the mathematical model derived above and the global gravity model GPM98(720 degree), numerical results of influence of remote zones are also derived. In a combined procession of different gravity gradient observations, the results can be referred to. |
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| Keywords: | second derivative of disturbing potential influence of remote zones truncation radius |
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