| 应用GPS监测城市地表形变的初步分析 |
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| 引用本文： | 刘大杰,胡丛玮.应用GPS监测城市地表形变的初步分析[J].大地测量与地球动力学,1999,19(1):37-42. |
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| 作者姓名： | 刘大杰 胡丛玮 |
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| 作者单位： | 同济大学测量与国土信息工程系,上海,200092 |
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| 摘 要： | 根据实例，总体介绍了用ＧＰＳ监测城市地表形变的观测及数据处理方法。首先根据ＧＰＳ获得的基线结果进行３维自由网平差，由定期观测获得了各个监测点的水平位移和垂直位移。然后针对城市监测范围较小，在将其按照矩形格网划分后，给出了两种拟合方法：线性内插法和多面函数拟合法。据此，计算获得了城市地表的水平位移场和垂直位移（沉降）面，并对两种方法获得的结果作了比较。根据计算结果绘制了水平位移场、垂直沉降面及其等值线图，可以直观地了解地表形变信息。同时对于用ＧＰＳ监测城市形变的观测和数据处理中需要注意的问题作了简要的分析。
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| 关 键 词： | 形变测量 水平位移 垂直位移 |
PRELIMINARY ANALYSIS FOR THE EARTH SURFACE DEFORMATION IN URBAN AREA WITH GPS |
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| Liu Dajie,Hu Congwei.PRELIMINARY ANALYSIS FOR THE EARTH SURFACE DEFORMATION IN URBAN AREA WITH GPS[J].Journal of Geodesy and Geodynamics,1999,19(1):37-42. |
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| Authors: | Liu Dajie Hu Congwei |
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| Abstract: | Through a real project, the observation and data processing method for the earth surface deformation with GPS are presented briefly in this paper, and a preliminary analysis and result for the earth surface deformation with GPS observation are given. Firstly, a 3 dimension adjustment is conducted from GPS baseline vectors and the horizontal and vertical displacement for each station are obtained by regular observing. Usually the monitored urban area is relatively small. Then after dividing the monitored area with grids, two fitting methods, linear interpolation and multiquadrics, are introduced. Hence the horizontal displacement field and vertical subsidence surface are got and comparing analysis is given from these two methods. On the other hand, some problems on the observation and data processing method for earth surface deformation monitoring with GPS are discussed. |
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| Keywords: | deformation measurement horizontal displacement vertical displacement |
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