| 利用GPS地形变资料在大地坐标系中计算应变 |
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| 引用本文： | 顾国华,孙汉荣,孙惠娟,杨春花.利用GPS地形变资料在大地坐标系中计算应变[J].大地测量与地球动力学,1998(3). |
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| 作者姓名： | 顾国华 孙汉荣 孙惠娟 杨春花 |
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| 作者单位： | 中国地震局分析预报中心，中国地震局第一地形变监测中心 |
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| 基金项目： | 中国地震局地震科学联合基金,人事部留学回国人员科技活动经费资助 |
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| 摘 要： | 根据正交曲线坐标中应变张量的定义，得到了用大地坐标在椭球面上计算应变的方法。由此可直接利用ＧＰＳ或其他３维大地测量技术得到的位移或其他形变量计算地应变。这一方法克服了利用平面坐标作计算的限制，无投影误差影响。本文给出了用首都圈ＧＰＳ地形变监测网１９９５～１９９６年椭球面上的位移求得的应变量。
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| 关 键 词： | GPS 地震预报 水平形变 应变 椭球体 |
DEDUCTION OF STRAIN FROM GPS CRUSTAL DEFORMATION DATA IN GEODETIC COORDINATE SYSTEM |
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| Gu Guohua.DEDUCTION OF STRAIN FROM GPS CRUSTAL DEFORMATION DATA IN GEODETIC COORDINATE SYSTEM[J].Journal of Geodesy and Geodynamics,1998(3). |
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| Authors: | Gu Guohua |
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| Abstract: | Based on the definition of strain tensor in orthogonal coordinate system, the strain on ellipsoid with geodetic coordinates is obtained in this paper. Then strain on the earth surface can be calculated directly from displacements or other deformation data observed with GPS or other 3 D geodetic techniques. This method overcomes the limitation of strain calculation usually used in plane coordinate system and is free of mapping projection errors. Strain patterns are obtained from displacements in the GPS network for crustal deformation observation in Beijing area. |
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| Keywords: | GPS earthquake prediction horizontal deformation strain ellipsoid |
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