| 用重复重力测量测定垂线偏差时变的精度 |
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| 引用本文： | 李月锋,丁行斌.用重复重力测量测定垂线偏差时变的精度[J].天文学报,2005,46(4):460-473. |
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| 作者姓名： | 李月锋 丁行斌 |
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| 作者单位： | 1. 中国科学院上海天文台,上海,200030;上海应用技术学院数理部,上海,200235
2. 信息工程大学测绘学院,郑州,450053 |
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| 基金项目： | 国家自然科学基金重点项目10133010资助 |
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| 摘 要： | 列举两种垂线偏差时变测定的微分公式，从理论上对用重复重力测量的方法测定垂线偏差时变的精度进行了探讨．在目前情况下，垂线偏差时变测定精度可以达到0．005＂．远区域的点对它的影响可以忽略不计，通过对重力网的模拟计算，进一步得到验证．探讨了有效积分半径对垂线偏差时变测量精度的影响，并在此基础上讨论了重力网优化的问题．
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| 关 键 词： | 重力测量 垂线偏差时变 重力位时变 |
| 修稿时间： | 2004年11月10 |
Measuring Precision of Time-Variation of Plumb-Line Deflection by Repeated Gravimetry |
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| LI Yue-feng,DING Xing-bin.Measuring Precision of Time-Variation of Plumb-Line Deflection by Repeated Gravimetry[J].Acta Astronomica Sinica,2005,46(4):460-473. |
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| Authors: | LI Yue-feng DING Xing-bin |
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| Abstract: | Two differential formulas for evaluating time-variation of plumb-line deflection are given, and precision of measuring time-variation of plumb-line deflection by repeated gravimetry is studied in theory. At present, the accuracy of time-variation of plumb-line deflection can be attained to 0.005" and the influence in far area can be ignorable. By analog computation of gravimetric network, the conclusions above are verified. On the basis that the effective area of the gravimetric network is limited, effective integral radius, resolution, adverse region and so on are discussed; local factor effecting the change of precision is analyzed roughly. |
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| Keywords: | gravimetry time-variation of plumb-line deflection time-variation of gravity potential |
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