海潮改正模型对GPS基线的影响

利用GAMIT软件解算了2011年前200天国内9个IGS站的数据,解算时考虑采用未加入和分别加入4种不同的海潮改正模型等情况,对4种不同海潮改正模型在基线分量上的影响进行了比较,说明了不同模型对GPS基线的影响差异较小;并对含沿海地区GPS测站和只含内陆地区GPS测站的基线进行了分析,结果表明含沿海地区GPS测站的基线比只含内陆地区GPS测站的基线受海潮改正模型的影响大;最后重点采用功率谱分析了海潮改正对GPS基线分量影响的周期,得到其3个方向的变化周期。

Influence of Ocean Loading Tides Correction Model on GPS baselineby

This thesis resolved the data of 9 domestic IGS station among 200 days before 2011 by means of GAMIT software.This resolving adopted both not adding and adding four different kinds of correction of ocean loading tides models individually,made compare with the influence of the base component of these four different corrections of ocean loading tides models,and illustrated that the differences of the impacts on GPS base line of different models was small.We analyzed the baselines of the GPS station baselines,which contains the coastal areas or only contains inland areas in this paper,the results show that the correction of ocean loading tides models has more impact on the baseline of GPS station which contains the coastal areas more than the one only contains inland areas.Lastly,we mainly analyzed the period of the impact on GPS base component of correction of ocean loading tides through power spectrum,and got the periodic variation of three directions.