| 内蒙古陆态网络坐标时间序列噪声分析及速度场修正 |
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| 引用本文： | 李鑫,姚德新.内蒙古陆态网络坐标时间序列噪声分析及速度场修正[J].全球定位系统,2021,46(6):68-73. |
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| 作者姓名： | 李鑫 姚德新 |
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| 作者单位： | 1.兰州交通大学 测绘与地理信息学院, 兰州 730070 |
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| 基金项目： | 兰州交通大学优秀平台支持(201806) |
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| 摘 要： | 利用中国地震局全球卫星导航系统(GNSS)数据产品服务平台获取内蒙古自治区境内15个陆态网络连续站2010-06—2021-06的观测数据，通过GAMIT/GLOBK软件、HECTOR软件解算得到去奇异值后的坐标时间序列，最后结合贝叶斯信息量准则(BIC)数值分析确定最优噪声模型:内蒙古自治区坐标时间序列在东(E)方向的最优模型为白噪声+闪烁噪声 (WN+FN)，在北(N)和天顶(U)方向的最优噪声模型为白噪声+幂律噪声(WN+PL). 采用最佳噪声模型对速度场进行修正，在ITRF14框架下，内蒙古地区陆态网络连续站的平均运动速率为30.653 mm/a，运动方向为26°57′51″SEE；垂直方向上平均运动速率为0.792 mm/a.
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| 关 键 词： | 陆态网络 时间序列 贝叶斯信息量准则(BIC)数值分析法 噪声模型 速度场 |
| 收稿时间： | 2021-07-08 |
Noise analysis and velocity field correction of Inner Mongolia CMONOC coordinate time series |
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| Affiliation: | 1.College of Surveying and Geo-informatics, Lanzhou Jiaotong University, Lanzhou730070, China2.National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring , Lanzhou 730070, China3.Gansu Provincial Engineering Laboratory for National Geographic State Monitoring , Lanzhou 730070, China |
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| Abstract: | This paper use the Global Navigation Satellite System (GNSS) data product service platform of China earthquake administration to obtain the observation data of 15 continuous terrestrial network stations in the Inner Mongolia from 2010-06 to 2021-06, and use GAMIT/GLOBK software and HRCTOR software to calculate the coordinate time series after removing the singular values. Finally, Bayesian information criterion (BIC) numerical analysis is combined with to determine the optimal noise model: the optimal model of Inner Mongolia coordinate time series in the east (E) direction is white noise+flicker noise (WN+FN), and the optimal noise model in the north (N) and zenith (U) directions is white noise+power law noise (WN+PL). The optimal noise model is used to correct the velocity field. Under the ITRF14 framework, the average moving speed of the land network in Inner Mongolia is 30.653 mm/a, and the moving direction is 26°57′51″SEE; The average moving speed in the vertical direction is 0.792 mm/ a. |
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