GNSS垂向形变场信息提取的尝试

一定条件下GNSS流动复测资料可为我们揭示地形变提供必要的依托，但由于垂向分量观测误差较大而没有被恰当地利用。利用华北地区1999-2007年的4期资料，从形变场的连续变化角度出发，提出了利用多核函数进行解析与滤波的方法，理论与结：器表明：①可获得垂直运动场的数学解析；②可实现对垂向运动场不同层次的滤波与信息分离；③当流动测站具有一定的空间密度、一定数量的复测结果和时间长度则可获得较可靠的形变信息。最后利用华北地区GNSS流动观测资料给出了实际算例与初步分析结果。

Some Attempt about Distilling Information of Vertical Deformation Field from GNSS Data

In certain condition,GNSS mobile observations can provide essential support to reveal crustal deformation,but they were not used properly because of large observation error in vertical component.From the perspective of continuous variation of deformation field,a method by using multi-kernel function to filtering and analysis is proposed with 4 observations(1999—2007) in the GPS network of North China,theory and results show as follows.Firstly,mathematical analysis of vertical motion field can be obtained.Secondly,different levels of filtering and information separation of vertical deformation field can be realized.Thirdly,if the space density of mobile stations,quantity and time length of repetition measurement can reach a certain level,reliable deformation information can be achieved.Finally,a practical example and preliminary analysis results with GNSS mobile observations in North China were given.