| 论地面垂直变形监测中应用GPS技术的可能性 |
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| 引用本文： | 黄立人,匡绍君.论地面垂直变形监测中应用GPS技术的可能性[J].大地测量与地球动力学,2000,20(1):30-37. |
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| 作者姓名： | 黄立人 匡绍君 |
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| 作者单位： | 1. 中国地震局第一地形变监测中心,天津,300180
2. 天津市控制地面沉降工作办公室,天津,300180 |
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| 摘 要： | 用GPS技术传递高程基准时需要知道精确的大地水准面与椭球面之差.但在垂直变形监测的特定情况下,人们关心的是高程的变化而不是高程本身.提出在地面沉降监测中可用站坐标系下的U分量变化代替水准测量高差的变化.分析了这一方法的可能误差和大小.根据1995～1998年连续4年的GPS与精密水准对比观测,验证了方法的实际精度,表明在地面沉降监测中有可能用GPS技术代替精密水准传递高程基准.
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| 关 键 词： | 垂直变形 GPS 精密水准测量 站坐标系下的U分量 |
| 修稿时间： | 1999-04-26 |
POSSIBILITY OF APPLICATION OF GPS TECHNIQUE TO VERTICAL DEFORMATION MEASUREMENT |
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| Huang Liren,Kuang Shaojun.POSSIBILITY OF APPLICATION OF GPS TECHNIQUE TO VERTICAL DEFORMATION MEASUREMENT[J].Journal of Geodesy and Geodynamics,2000,20(1):30-37. |
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| Authors: | Huang Liren Kuang Shaojun |
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| Institution: | Huang Liren
(No.1 Crustal Deformation Monitoring Center,CSB, Tianjin 300180)
Kuang Shaojun
(Land Subsidence Control Work Office of Tianjin City, Tianjin 300202) |
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| Abstract: | For a long time, the geodetists take interest in height datum to be transferred at long distance by the GPS technique.The main problem is that the accurate difference between geoid and ellipsoid should be known when using GPS to transfer height datum.In the other hand,in the particular case of vertical deformation measurement,the height variation rather than the height itself is concerned. It is proposed in this paper that the variation of height difference in the leveling can be substituted with the variation of U component in station coordinate system in and subsidence monitoring and the possible factors and magnitudes of the error are analyzed. On the basis of the successive contrast between GPS and precise leveling from 1995 to 1998,the actuall precision of the proposed method is tested. It is proved that the precise leveling may be substituted with the GPS technique to transfer the height datum in land subsidence monitoring. |
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| Keywords: | vertical deformation GPS Precise leveling U component in station coordinate system |
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