IGS测站的非线性变化研究

¹ 武汉大学测绘学院,武汉市珞喻路129号, 430079² 武汉大学地球空间环境与大地测量教育部重点实验室,武汉市珞喻路129号, 430079³武汉大学卫星导航定位技术研究中心,武汉市珞喻路129号,430079

基金项目: 国家863计划资助项目(2006AA12Z323);国家973计划资助项目(2006CB701301);国家自然科学基金资助项目(40574005)。

详细信息

On Non-linear Motion of IGS Station

¹ School of Geodesy and Geomatics, Whuan University,129 Luoyu Road,Wuhan 430079,China ;² Key Laboratory of Geospace Environment and Geodesy, Ministry of Education,Whuan University,129 Luoyu Road, Wuhan 430079,China ;³ Research Center of GNSS, Whuan University,129 Luoyu Road,Wuhan 430079, China

Funds: 国家863计划资助项目(2006AA12Z323);国家973计划资助项目(2006CB701301);国家自然科学基金资助项目(40574005)。

摘要: 基于坐标模式的广义网平差模型,利用IGS发布的对GPS全球站处理后形成的单天解SINEX文件,通过自编软件计算了IGS测站的时间序列,并发现IGS测站存在非线性变化。利用频谱分析方法得出了IGS测站存在年周期或半年周期的变化,同时利用经验模型建立了IGS测站的测站速度函数。指出了仅利用1个线性量估计IGS跟踪站的速度值会存在偏差,应建立周期性变化模型,或采用分段线性化的方法,每隔一定的时间给出1个对应的速度。
- IGS测站 /
- 非线性 /
- 频谱分析 /
- 经验模型
Abstract: With the daily SINEX files of IGS, the time series of IGS stations are obtained by independently developed software under generalized network adjustment model with coordinate pattern. From the time series, non-linear motion are found.With spectral analysis method, the variation frequency of site velocity are found.Moreover, the empirical model of the velocity variation of the station has been established by regressive analysis method based on week solution coordinate series of the station.With respect to the velocity of IGS tracking station, it had better to model the variation periodically or to give a velocity periodically using piece-wise linear function rather than using a linear variable to estimate its bias.
- IGS station /
- non-linear /
- spectral analysis /
- empirical model