由GPS基线向量解算地面形变  

Application of GPS Technique on Surface Deformation Monitoring

作　　者：王解先[1] 

机构地区：[1]同济大学测量与国土信息工程系

出　　处：《同济大学学报（自然科学版）》2005年第7期967-970,共4页Journal of Tongji University:Natural Science

摘　　要：通常采用比较各期坐标变化的方法来分析全球定位系统(GPS)形变网的数据.提出一种整体平差模型,将各期GPS基线向量放在一起平差,定义各点在任意时刻的坐标为其在参考时刻的坐标和形变速度与形变时间的乘积之和.为了更具直观性、更容易加上先验已知信息,将空间坐标参数转换为平面坐标和大地高参数,将空间坐标形变速度转换为水平位移和沉降速度参数.整体平差同时计算出参考时刻的站坐标和形变速度,还推导了相应的协方差矩阵,算例表明模型正确.Usually the deformation velocities are determined by the comparison of coordinate changes among different epochs.In this paper, a whole adjustment model is introduced in processing GPS deformation monitor- ing network.Baselines of all epochs are adjusted together.The coordinates of each point are divided to coordi- nates at reference time and multiplication of deformation velocity and duration interval.To be more clearly the space coordinate parameters are replaced by plan coordinate and ellipsoid height,and the space deformation ve- locities are replaced by horizontal and vertical deformation velocities.The coordinates of each station at refer- ence epoch are calculated simultaneously with deformation velocities.The variance and co-variance matrix is deduced also.The example shows the model works well.

关 键 词：基线向量解算 地面形变 GPS基线向量 全球定位系统 空间坐标 协方差矩阵 平差模型 坐标变化 平面坐标 参数转换 整体平差 速度参数 水平位移 直观性 高参数 大地 

分 类 号：P228.4[天文地球—大地测量学与测量工程] U412[天文地球—测绘科学与技术]