为了研究海潮负荷对中国区域连续运行观测站精密定位的影响,利用 GAMIT 软件,采用加入全球海潮模型和不加入全球海潮模型两种解算模式,选取了不同区域的 CORS 站点和同一区域多天的 CORS 站点分别进行解算,并对解算结果进行了分析比较...为了研究海潮负荷对中国区域连续运行观测站精密定位的影响,利用 GAMIT 软件,采用加入全球海潮模型和不加入全球海潮模型两种解算模式,选取了不同区域的 CORS 站点和同一区域多天的 CORS 站点分别进行解算,并对解算结果进行了分析比较。结果表明:海潮负荷位移在海岛上的影响最大,特别是在 U 方向,达到了厘米级,在 N 和 E 方向上的影响相对较小;沿海站点 E 和 U 方向上的影响在0. 2~ 0. 3 cm之间,N 方向上的影响相对较小,而对内陆站点的影响基本可以忽略不计;对于 CORS 站点连续多天的基线处理,加入海潮模型改正对整体解算精度有一定的改善。所以在高精度定位解算时必须加入海潮模型改正。展开更多
The synthetic tidal parameters with high spatial resolution for gravity over China and its neighbor area are constructed with Earth＇s tidal model and ocean tide loading calculated using TPXO7 global ocean tide model ...The synthetic tidal parameters with high spatial resolution for gravity over China and its neighbor area are constructed with Earth＇s tidal model and ocean tide loading calculated using TPXO7 global ocean tide model as well as tidal data over China seas. The comparison between synthetic parameters and ones observed by spring gravimeters at some seismic network stations and Hong Kong station and one observed by super-conducting gravimeter at Wuhan station shows that the average differences in amplitude factors and phases are smaller than 0.005 and 0.5° respectively; and that the discrepancies between observational and synthetic parameters are dependent on gravimetric technique in that the synthetic parameters are in well agreement with the superconducting gravimetric observations. This also indicates that the synthetic result is a good estimation for tidal gravity, and the numerical results in the present paper not only can provide ground and space gravimetry such as absolute gravimetry with correction model of tidal gravity, but also provide effective tidal parameters over areas where no observation is carried out.展开更多
文摘为了研究海潮负荷对中国区域连续运行观测站精密定位的影响,利用 GAMIT 软件,采用加入全球海潮模型和不加入全球海潮模型两种解算模式,选取了不同区域的 CORS 站点和同一区域多天的 CORS 站点分别进行解算,并对解算结果进行了分析比较。结果表明:海潮负荷位移在海岛上的影响最大,特别是在 U 方向,达到了厘米级,在 N 和 E 方向上的影响相对较小;沿海站点 E 和 U 方向上的影响在0. 2~ 0. 3 cm之间,N 方向上的影响相对较小,而对内陆站点的影响基本可以忽略不计;对于 CORS 站点连续多天的基线处理,加入海潮模型改正对整体解算精度有一定的改善。所以在高精度定位解算时必须加入海潮模型改正。
基金The Knowledge Innovation Program of the Chinese Academy of Sciences (KZCX2-YW-133)National Nature Science Foundation of China (40730316, 40574034).
文摘The synthetic tidal parameters with high spatial resolution for gravity over China and its neighbor area are constructed with Earth＇s tidal model and ocean tide loading calculated using TPXO7 global ocean tide model as well as tidal data over China seas. The comparison between synthetic parameters and ones observed by spring gravimeters at some seismic network stations and Hong Kong station and one observed by super-conducting gravimeter at Wuhan station shows that the average differences in amplitude factors and phases are smaller than 0.005 and 0.5° respectively; and that the discrepancies between observational and synthetic parameters are dependent on gravimetric technique in that the synthetic parameters are in well agreement with the superconducting gravimetric observations. This also indicates that the synthetic result is a good estimation for tidal gravity, and the numerical results in the present paper not only can provide ground and space gravimetry such as absolute gravimetry with correction model of tidal gravity, but also provide effective tidal parameters over areas where no observation is carried out.
