海南岛CORS站坐标时间序列特征分析  

Characteristic Analysis of Coordinate Time Series of CORS Station in Hainan Island

作　　者：许世民 何南 陆大进 陈科 XU Shimin;HE Nan;LU Dajin;CHEN Ke(Information Technology Institute of POWERCHINA Kunming Engineering Co.,Ltd.,Kunming 650051,China)

机构地区：[1]中国电建集团昆明勘测设计研究院有限公司信息技术研究院,云南昆明650051

出　　处：《测绘与空间地理信息》2024年第11期130-132,137,共4页Geomatics & Spatial Information Technology

摘　　要：通过GAMIT/GLOBK解算出海南岛CORS站坐标时间序列,分析海南岛CORS站坐标时间序列的噪声特性。根据最优噪声模型,N分量的最优噪声模型呈现多样性特征,E、U分量表现出一致性。分析有色噪声对于噪声量级的影响,仅考虑白噪声会高估其估值精度,须同时考虑白噪声与有色噪声。海南岛CORS站在水平方向都有向SEE向运动的趋势,与华南板块的运动方向一致。沿海测站的坐标时间序列所含的白噪声与闪烁噪声量级比岛内测站大,我国上空电离层的变化对闪烁噪声的影响较大,闪烁噪声量级明显大于白噪声,海南岛CORS站的闪烁噪声量级大于大陆沿海测站。This paper analyzes the noise characteristics of CORS station coordinate time series in Hainan Island through the coordinate time series of CORS stations in Hainan Island calculated by GAMIT/GLOBK.According to the optimal noise model,the optimal noise model of the N component shows diverse characteristics,and the E and U components show consistency.In order to analyze the influence of colored noise on the noise level,only considering white noise will overestimate its estimation accuracy,and both white noise and colored noise must be considered.The CORS stations in Hainan Island tend to move towards the SEE in the horizontal direction,which is consistent with the movement direction of the South China Plate.The magnitudes of white noise and flicker noise contained in the coordinate time series of coastal stations are larger than those of on-island stations.Changes in the ionosphere over China have a greater impact on flicker noise,and the magnitude of flicker noise is significantly greater than that of white noise.The flicker noise level of CORS stations in Hainan Island is larger than that of mainland coastal stations.

关 键 词：CORS站坐标时间序列 极大似然估计(MLE) 噪声模型 

分 类 号：P228.4[天文地球—大地测量学与测量工程]