GPS监测地壳形变漂移速度的计算
|
摘要
根据动态卡尔曼滤波理论,结合GPS监测地壳形变数据处理的特点,构建了动态卡尔曼滤波计算地壳运动漂移速度的数学模型.结合IGS的GPS连续观测网络部分站点的多期数据,使用精密定位定轨软件GAMIT进行定位计算,获得高精度的站点坐标.将坐标作为具有先验方差信息的准观测值,设置站点漂移速度为未知数,进行卡尔曼滤波漂移速度的估计.计算结果与已有结果的比较表明,卡尔曼滤波漂移速度估计可以达到mm级的精度,可用于GPS监测地壳形变进行漂移速度的估计.
Based on the dynamic Kalman Filter theory and the characteristics of data processing of GPS crustal deformation monitoring,a calculation model of floating velocity with a dynamic Kalman Filter was established.At first,the highly precise coordinates were calculated using many periods of data from some IGS stations and GAMIT software.Then,the obtained coordinates were considered as quasi-observations,and the velocities were considered as unknown variations and were computed with a Kalman Filter.A comparison of calculated and measured data shows that the presented model has a precision of several millimeters.So the model can be used for floating velocity estimation in GPS crustal deformation monitoring.
Based on the dynamic Kalman Filter theory and the characteristics of data processing of GPS crustal deformation monitoring,a calculation model of floating velocity with a dynamic Kalman Filter was established.At first,the highly precise coordinates were calculated using many periods of data from some IGS stations and GAMIT software.Then,the obtained coordinates were considered as quasi-observations,and the velocities were considered as unknown variations and were computed with a Kalman Filter.A comparison of calculated and measured data shows that the presented model has a precision of several millimeters.So the model can be used for floating velocity estimation in GPS crustal deformation monitoring.
引文
[1]顾国华,申旭辉,王敏,等.中国大陆现今地壳水平运动基本特征[J].地震学报,2001,23(4):362-369.
[2]牛之俊,游新兆.中国地壳运动速度场——GAMIT和GISPY解算结果对比[J].大地测量学与地球动力学,2003,23(3):4-8.
[3]王解先.GPS精密定轨定位[M].上海:同济大学出版社,1998.
[4]兰孝奇.GPS精密变形监测数据处理方法及其应用研究[D].南京:河海大学,2005.
[5]崔希璋,於宗木寿,陶本藻,等.广义测量平差[M].武汉:武汉测绘科技大学出版社,2000.
[6]刘大杰,陶本藻.实用测量数据处理方法[M].北京:测绘出版社,2000.
[7]Department of Earth,Atmospheric,and Planetary Sciences.Documentation for the GAMIT GPS analysis software[R].Cambridge:Massachusetts Institute of Technology,1999.
[8]孟国杰,赵承坤,顾国华,等.中国地壳运动观测网络首期观测数据处理[J].地震,2001,21(1):63-68.
[9]葛恒年.GPS地壳形变监测数据处理及大气水汽含量反演计算的研究[D].南京:河海大学,2006.
[10]陆彩平,王解先.GPS监测地壳数据处理[J].大地测量学与地球动力学,2002,22(4):56-60.
[2]牛之俊,游新兆.中国地壳运动速度场——GAMIT和GISPY解算结果对比[J].大地测量学与地球动力学,2003,23(3):4-8.
[3]王解先.GPS精密定轨定位[M].上海:同济大学出版社,1998.
[4]兰孝奇.GPS精密变形监测数据处理方法及其应用研究[D].南京:河海大学,2005.
[5]崔希璋,於宗木寿,陶本藻,等.广义测量平差[M].武汉:武汉测绘科技大学出版社,2000.
[6]刘大杰,陶本藻.实用测量数据处理方法[M].北京:测绘出版社,2000.
[7]Department of Earth,Atmospheric,and Planetary Sciences.Documentation for the GAMIT GPS analysis software[R].Cambridge:Massachusetts Institute of Technology,1999.
[8]孟国杰,赵承坤,顾国华,等.中国地壳运动观测网络首期观测数据处理[J].地震,2001,21(1):63-68.
[9]葛恒年.GPS地壳形变监测数据处理及大气水汽含量反演计算的研究[D].南京:河海大学,2006.
[10]陆彩平,王解先.GPS监测地壳数据处理[J].大地测量学与地球动力学,2002,22(4):56-60.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心