应用GPS连续观测修正流动观测垂向速率的分析与实验  

Analysis and Test of Correction to Vertical Velocity Measured by GPS Mobile Observation with Continuous Observation

作　　者：占伟[1,2] 李斐[1,3] 朱爽[2] 张杰[1] 

机构地区：[1]武汉大学测绘遥感信息工程国家重点实验室,湖北武汉430079 [2]中国地震局第一监测中心,天津300180 [3]武汉大学中国南极测绘研究中心,湖北武汉430079

出　　处：《武汉大学学报（信息科学版）》2016年第7期963-968,共6页Geomatics and Information Science of Wuhan University

基　　金：中国地震局地震行业科研专项基金(201308009);国家自然科学基金(41474002)~~

摘　　要：目前,基于GPS流动观测确定垂向变化速率受年周期运动影响较大,但因观测数据较少,不能有效消除周期性运动的影响,使得GPS流动观测得到的垂向速率精度较低。提出利用同一区域GPS连续观测修正流动观测垂向速率的方法,首先依据GPS连续站垂向时间序列计算得到连续站的年周期运动振幅,然后进行空间插值得到各流动站的年周期运动振幅,进而对流动站垂向时间序列进行周期性运动修正,最后依据修正后的流动站垂向时间序列求取垂向线性速率。分别选用云南地区陆态网络GPS连续（2010-2013年）和流动观测数据（2011-2013年）进行了验证。结果表明,在年周期运动空间一致性较好的区域,该方法能够有效修正GPS流动观测垂向速率,提高垂向速率的解算精度。At present,the vertical velocities measured by GPS mobile observations have relatively low precision,which is due to the significant effect of seasonal motion and which cannot be overcome effectively given the insufficient data.A method to correct the results of mobile observations by using the information from GPS continuous observation in the same area is given in this study.Firstly,amplitudes of annual motion in GPS continuous stations were calculated.The amplitudes were used to obtain the amplitudes in mobile stations by using spatial interpolation method.With the results above,the vertical time-series of mobile GPS could be corrected to weaken the annual motion effect,so the vertical velocity results were acquired with improved precision.Two tests based on the continuous（from 2010 to 2013）and mobile observation（from 2011 to 2013）from tectonic and environmental observation network（hereinafter referred to as TEONET）in Yunnan area are proposed to prove its reliability.The results show that,in the area with a consistent spatial motion with an annual period,the method can correct the results of vertical velocity measured by GPS mobile observation effectively and improve the precision of velocity results.

关 键 词：GPS 流动观测 垂向速率 修正 年周期运动 

分 类 号：P228.41[天文地球—大地测量学与测量工程]