Analysis of Environmental Loading Effects on Regional GPS Coordinate Time Series
Analysis of Environmental Loading Effects on Regional GPS Coordinate Time Series
复制标题
DOI：
10.13485/j.cnki.11-2089.2014.0149
复制
发表时间：
2014-12
期刊：
影响因子：
--
通讯作者：
J. Weiping;Xia Chuanyi;Li Zhao;Guo Qiyou;Zhang Shunqi
中科院分区：
文献类型：
--
作者：
J. Weiping;Xia Chuanyi;Li Zhao;Guo Qiyou;Zhang Shunqi
为了探讨环境负荷对区域GPS坐标时间序列的影响，利用中国地壳运动观测网络（CMONOC）1999 - 2011年和武汉连续业务卫星定位服务系统（WHCORS）2007 - 2012年的观测数据，以及中国和约35个IGS台站的观测数据，利用GAMIT软件进行了再处理，并对结果进行了分析。结果表明，环境负荷引起的中国境内GPS站位移具有明显的区域性特征，在环境负荷的影响下，中国境内GPS站的位移存在较大的区域性变化，且变化幅度较大，在环境负荷的影响下，中国境内GPS站的位移具有较大的区域性变化，在环境负荷的影响下，中国境内GPS站的位移具有较大的区域性变化，在环境负荷的影响下，中国境内GPS站的位移具有较大的区域性变化东北、华北、华中和西南地区的观测结果表明，西南地区各站垂直荷载位移均方根（RMS）最大值（KUNM）达6.09mm。结果表明，环境负荷订正能显著降低我国境内大部分台站垂直坐标和东向坐标时间序列的非线性变化（约占所选GPS基准站的70%），其中加权均方根（WRMS）的最大降低量达到1.5mm，但北向分量的改善程度相当有限。
In order to discuss environmental loading effects on regional GPS coordinate time series,the data which includes Crustal Movement Observation Network of China(CMONOC)measurements from 1999 to 2011and Wuhan Continuous Operational Satellite Positioning and Serving Syetem(WHCORS)measurements from2007 to 2012,together with China and around 35 IGS stations measurements are reprocessed by GAMIT,and the GPS fiducial stations coordinate time series under the ITRF2008 are obtained.The effects of environmental loading are then calculated by QOCA to correct the coordinate time series.It is found that the displacements of GPS stations inside China caused by environmental loading exhibit remarkable regional characteristics.Coherent and bigger variations exist in the northeast,north and central China,as well as the southwest regions,among which the biggest root mean square(RMS)of the vertical loading displacement for stations in southwest region(KUNM)reaches up to 6.09 mm.By comparing the corrected and the uncorrected time series,it is found that environmental loading correction could remarkably reduce the non-linear variations of most stations' vertical and east coordinate time series inside China(accounting for about 70%of the selected GPS fiducial stations),among which the biggest reduction in the weighted root mean square(WRMS)reaches 1.5mm.However,the improvement in the north components is quite limited.