摘要
选取全球417个IGS测站2000~2012年环境负载数据分析非潮汐海洋、大气、积雪和土壤湿度等负载对GPS测站时间序列位移的影响以及与测站地理位置之间的联系。研究表明,大气压力对GPS时间序列位移的影响最大,U方向最大达到20mm,积雪负载的影响最小。4种负载对GPS时间序列高程方向的影响可达cm级,且大气及非潮汐海洋负载呈现显著的区域性特征。
Environmental loading effects have spatial differences, in order to provide the basis for sub- sequent loading data selection to correct reference station coordinate time series. In this paper, we cal- culate 4 different kinds of environmental loadings （atmosphere pressure, non-tidal ocean, snow pres- sure and soil moisture displacement time series） that are related to 417 global IGS stations. Referring to the analysis of these data, this article discusses the relationship between the same kind of load dis- placement of global IGS stations and geographical position. The result shows that the effect of atmos- pheric pressure on the GPS time series displacement is maximum; the displacement of U direction can reach 20 ram. The effect of snow loading on the GPS time series displacement is minimal. Effects of four environmental loadings on GPS time series in elevation direction can reach the centimeter level. Furthermore, non-tidal ocean and atmospheric loading shows significant regional characteristics.
出处
《大地测量与地球动力学》
CSCD
北大核心
2017年第9期961-967,共7页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(41674005
41374011)
江西省数字国土重点实验室开放研究基金(DLLJ201605)~~
关键词
GPS时间序列
环境负载
空间分布
GPS coordinate time series
environmental loading
spatial space
