| 香港CORS站坐标时间序列分析研究 |
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| 引用本文： | 陈晨,魏冠军,高志钰,寇瑞雄.香港CORS站坐标时间序列分析研究[J].全球定位系统,2019,44(2):89-97. |
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| 作者姓名： | 陈晨 魏冠军 高志钰 寇瑞雄 |
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| 作者单位： | 1.兰州交通大学 测绘与地理信息学院,甘肃 兰州 730070 |
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| 基金项目： | 国家自然科学基金(41771002);兰州交通大学"百名青年优秀人才培养计划"(152022);兰州交通大学优秀平台支持(201806) |
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| 摘 要： | 针对不同地区连续运行参考站(CORS)坐标时间序列周期特性与噪声特性存在的差异性问题,本文采用功率谱分析法和极大似然法分析香港卫星参考站网(SatRef)的坐标时间序列.研究结果表明,参考站点的三个坐标分量上都存在明显的年周期项与半年周期项.各参考站坐标分量上的噪声特性存在多样化的特征,白噪声(WN)加闪烁噪声(FN)是主要噪声模型,仅考虑WN而忽视有色噪声(CN)的做法会大大低估参数估计的不确定度.根据最优噪声模型估值得出的SatRef站速度场在水平方向上有整体向东南方向运动的趋势,与华南块体的运动结果基本一致.
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| 关 键 词： | 时间序列 功率谱分析法 极大似然估计法 周期特性 噪声模型 参数估计 |
Coordinate time series analysis of Hong Kong CORS station |
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| CHEN Chen,WEI Guanjun,GAO Zhiyu,KOU Ruixiong.Coordinate time series analysis of Hong Kong CORS station[J].Gnss World of China,2019,44(2):89-97. |
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| Authors: | CHEN Chen WEI Guanjun GAO Zhiyu KOU Ruixiong |
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| Affiliation: | (Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China;National-LocalJoint Engineering Research Center of Technologies and Application for National GeographicState Monitoring,Lanzhou 730070,China;Gansu Provincial Engineering Laboratory forNational Geographic State Monitoring,Lanzhou 730070,China) |
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| Abstract: | According to the difference between the periodic characteristics and the noise characteristics of the coordinate time series of CORS stations in different regions, the power spectrum analysis method and the maximum likelihood method are used to analyze the coordinate time series of the Hong Kong satellite reference station network (SatRef). The research results show that there are obvious annual period items and half-year period items on the three coordinate components of the reference station. There are diversified features of the noise characteristics on the coordinate components of each reference station. White noise plus flicker noise is the main noise model. The practice of considering only white noise and neglecting colored noise can greatly underestimate the uncertainty of parameter estimation. According to the optimal noise model, the velocity field of the SatRef station has a trend of moving toward the southeast in the horizontal direction, which is basically consistent with the motion of the South China block. |
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| Keywords: | time series power spectrum analysis maximum likelihood estimation method periodic characteristics noise model parameter estimation |
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