顾及非构造形变的参考站长期稳定性分析  

Long-Term Stability of Reference Stations by Taking Non-tectonic Deformation into Account

作　　者：钱闯[1] 刘晖[1] 丁志刚 郑洪艳[1] 

机构地区：[1]武汉大学卫星导航定位技术研究中心,湖北武汉430079 [2]山东北斗华宸导航技术有限公司,山东淄博255086

出　　处：《武汉大学学报（信息科学版）》2015年第9期1259-1265,共7页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2012AA12A209)~~

摘　　要：连续运行参考站可为地表位移研究提供连续可靠的原始数据,研究多个参考站的位置时间序列(也称为坐标时间序列)可以反映出该地区地表沉降和运动趋势,进而对引起运动的线性变化和非线性变化进行研究。本文以江西连续运行参考站网络(JXCORS)为例,通过建立各参考站3a的位置序列对江西地区的线性变化和非线性变化现象进行研究。在江西地区的线性变化中,局部平面变形很小(与附近陆态网站点的平均速率差异在1mm/a以内,优势方向差异为1.63°),垂向变化较为稳定(上抬升平均速度为1.887mm/a,沉降平均速度为0.906mm/a);在非线性变化研究中,参考站存在垂向半年周期的变化规律,进一步研究表明,水文负载是造成该变化的成因之一。Continuously operating reference stations can provide continuous and reliable original data for surface displacement studies. Multiple reference stations＇ position time series（Coordinate time series） may reflect surface subsidence and movement trends in the region, and is the basis for further research on linear and non-linear change in the movement. In this paper, continuously operating reference station network in Jiangxi （JXCORS） is researched as an example. The phenomena of linear and non-linear changes in Jiangxi were studied based on the establishment of the position series for three years at each reference station. For the linear variation, local plane deformation is small （The difference of average rate and dominant direction with the nearby sites are less than 1 mm/a and 1.63° respectively, the change of elevation direction is comparative stable）. The average lifting speed and settlement speed are 1. 887 mm/a and 0. 906 mm/a respectively. For the non-linear change, the vertical position of the reference stations has a semi-annual cycle, which is partially caused by hydrological load.

关 键 词：CORS 位置时间序列 速度场 地面沉降 非构造形变 

分 类 号：P228.42[天文地球—大地测量学与测量工程]