【摘要】：受特殊海岸線及復(fù)雜海底地形的影響,目前發(fā)布的全球海潮模型在局部沿海地區(qū)差異較大,需利用其他大地測量手段直接測定沿海地區(qū)的海潮負(fù)荷位移參數(shù)。GPS技術(shù)因具有全天候、精度高、成本低等優(yōu)勢,已成為獲取海潮負(fù)荷位移參數(shù)的有效手段。本文基于GPS技術(shù)監(jiān)測測站三維位移變化的靈敏度高于監(jiān)測48個海潮參數(shù)的靈敏度這一基本思想,改進(jìn)了利用GPS精密單點定位(PPP)技術(shù)估計48個海潮調(diào)和參數(shù)的方法,直接逐歷元求解三維海潮負(fù)荷位移變化,再利用調(diào)和分析方法提取主要潮波(M2、S2、N2、K2、K1、O1、P1、Q1)的海潮負(fù)荷位移建模參數(shù)(振幅與相位)。利用12個香港連續(xù)運行參考站(CORS)8年的GPS觀測數(shù)據(jù),計算各測站的海潮負(fù)荷位移建模參數(shù)。與傳統(tǒng)方法比較,本文方法可有效加速K1潮波在東西方向的收斂。將GPS海潮負(fù)荷位移建模參數(shù)估值與中國近海海潮模型值比較,發(fā)現(xiàn)除S2、K2和K1潮波的均方根誤差較大外,其他潮波的均方根誤差均小于1.5mm。將香港2008—2014年驗潮站數(shù)據(jù)反演的潮波參數(shù)與海潮模型值比較,結(jié)果表明:GPS與驗潮站數(shù)據(jù)反演的潮波參數(shù)均與中國近海海潮模型及HAMTIDE2011.11A全球海潮模型符合較好,驗證了GPS PPP反演海潮負(fù)荷位移的有效性。采用GPS PPP估計的8個潮波的振幅與相位值替換全球海潮模型中對應(yīng)的潮波值,進(jìn)行海潮負(fù)荷效應(yīng)改正,可減弱GPS長時間序列中的半周年信號。
[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.
【作者單位】： 國家測繪地理信息局大地測量數(shù)據(jù)處理中心;長安大學(xué);中國科學(xué)院國家授時中心;機械工業(yè)勘察設(shè)計研究院有限公司;
【基金】：國家自然科學(xué)基金(41504006;41674034) 國家重點研究發(fā)展計劃(2016YFB0501804) 中科院百人計劃和前沿科技重點研發(fā)計劃(QYZDB-SSW-DQC028)~~
【分類號】：P228.4;P714.1
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本文編號：2228722