利用GPS动态PPP技术求解海潮负荷位移
发布时间：2018-09-07 15:58
【摘要】：受特殊海岸线及复杂海底地形的影响,目前发布的全球海潮模型在局部沿海地区差异较大,需利用其他大地测量手段直接测定沿海地区的海潮负荷位移参数。GPS技术因具有全天候、精度高、成本低等优势,已成为获取海潮负荷位移参数的有效手段。本文基于GPS技术监测测站三维位移变化的灵敏度高于监测48个海潮参数的灵敏度这一基本思想,改进了利用GPS精密单点定位(PPP)技术估计48个海潮调和参数的方法,直接逐历元求解三维海潮负荷位移变化,再利用调和分析方法提取主要潮波(M2、S2、N2、K2、K1、O1、P1、Q1)的海潮负荷位移建模参数(振幅与相位)。利用12个香港连续运行参考站(CORS)8年的GPS观测数据,计算各测站的海潮负荷位移建模参数。与传统方法比较,本文方法可有效加速K1潮波在东西方向的收敛。将GPS海潮负荷位移建模参数估值与中国近海海潮模型值比较,发现除S2、K2和K1潮波的均方根误差较大外,其他潮波的均方根误差均小于1.5mm。将香港2008—2014年验潮站数据反演的潮波参数与海潮模型值比较,结果表明:GPS与验潮站数据反演的潮波参数均与中国近海海潮模型及HAMTIDE2011.11A全球海潮模型符合较好,验证了GPS PPP反演海潮负荷位移的有效性。采用GPS PPP估计的8个潮波的振幅与相位值替换全球海潮模型中对应的潮波值,进行海潮负荷效应改正,可减弱GPS长时间序列中的半周年信号。
[Abstract]:Influenced by the special coastline and complicated seabed topography, the global tidal model published at present is quite different in the local coastal areas, so it is necessary to use other geodetic methods to directly measure the tidal load displacement parameters in the coastal areas. GPS technology has become the parameter of tidal load displacement because of its advantages of all-weather, high precision and low cost. Based on the basic idea that the sensitivity of GPS technology is higher than that of 48 tidal parameters, this paper improves the method of estimating 48 tidal harmonic parameters by using GPS precise single point positioning (PPP) technology, and solves the 3-D tidal load displacement change directly by epoch, then harmonic analysis is used. Methods The modeling parameters (amplitude and phase) of tidal load and displacement of main tidal waves (M2, S2, N2, K2, K1, O1, P1, Q1) were extracted. The modeling parameters of tidal load and displacement of 12 Hong Kong Continuous Operation Reference Stations (CORS) for 8 years were calculated. Comparing the GPS tidal load displacement modeling parameters with the Chinese Offshore Tidal Model values, it is found that except for the larger root mean square errors of S2, K2 and K1 tidal waves, the root mean square errors of other tidal waves are all less than 1.5mm. The simulated tidal wave parameters are in good agreement with the China Offshore Tidal Model and the HAMTIDE2011.11A global tidal model, which verify the validity of GPS PPP inversion of tidal load displacement. The half year signal in the inter sequence.
【作者单位】： 国家测绘地理信息局大地测量数据处理中心;长安大学;中国科学院国家授时中心;机械工业勘察设计研究院有限公司;
【基金】：国家自然科学基金(41504006;41674034) 国家重点研究发展计划(2016YFB0501804) 中科院百人计划和前沿科技重点研发计划(QYZDB-SSW-DQC028)~~
【分类号】：P228.4;P714.1
，
本文编号：2228722
[Abstract]:Influenced by the special coastline and complicated seabed topography, the global tidal model published at present is quite different in the local coastal areas, so it is necessary to use other geodetic methods to directly measure the tidal load displacement parameters in the coastal areas. GPS technology has become the parameter of tidal load displacement because of its advantages of all-weather, high precision and low cost. Based on the basic idea that the sensitivity of GPS technology is higher than that of 48 tidal parameters, this paper improves the method of estimating 48 tidal harmonic parameters by using GPS precise single point positioning (PPP) technology, and solves the 3-D tidal load displacement change directly by epoch, then harmonic analysis is used. Methods The modeling parameters (amplitude and phase) of tidal load and displacement of main tidal waves (M2, S2, N2, K2, K1, O1, P1, Q1) were extracted. The modeling parameters of tidal load and displacement of 12 Hong Kong Continuous Operation Reference Stations (CORS) for 8 years were calculated. Comparing the GPS tidal load displacement modeling parameters with the Chinese Offshore Tidal Model values, it is found that except for the larger root mean square errors of S2, K2 and K1 tidal waves, the root mean square errors of other tidal waves are all less than 1.5mm. The simulated tidal wave parameters are in good agreement with the China Offshore Tidal Model and the HAMTIDE2011.11A global tidal model, which verify the validity of GPS PPP inversion of tidal load displacement. The half year signal in the inter sequence.
【作者单位】： 国家测绘地理信息局大地测量数据处理中心;长安大学;中国科学院国家授时中心;机械工业勘察设计研究院有限公司;
【基金】：国家自然科学基金(41504006;41674034) 国家重点研究发展计划(2016YFB0501804) 中科院百人计划和前沿科技重点研发计划(QYZDB-SSW-DQC028)~~
【分类号】：P228.4;P714.1
，
本文编号：2228722
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