利用短期静态PPP结果反演海潮负荷位移

采用香港11个GPS测站的观测资料进行1 h、2 h、3 h和4h静态PPP解算，获得4组PPP坐标序列，利用调和分析求取11个测站处8个主要分潮的负荷位移参数（振幅和相位），将其与海潮模型计算的负荷位移参数进行对比，并比较分析PPP反演值与海潮模型值改正海潮负荷信号的效果。结果表明，垂直和水平方向上，不同PPP结果反演8个分潮的负荷位移分别具有约5 mm和7 mm的差异；PPP反演8个分潮垂向负荷位移优于全球海潮模型，但水平方向上的反演效果稍弱。

Using Short Time-Scale Static PPP Results to Invert Ocean Tide Loading Displacement

In this paper, we first do 1 h, 2 h, 3 h and 4 h static PPP solutions by using short time-scale observation data from 11 GPS stations in Hong Kong, and then 4 sets of PPP coordinate sequences are obtained. Second, ocean tide loading (OTL) displacement parameters (amplitude and phase) of 8 main tidal constituents of 11 stations are obtained by harmonic analysis. Third, the misfits between PPP inversion value and ocean tide model value are analyzed. Finally, we compare the effect of correcting OTL signals by PPP inversion value and ocean tide model value. The results show that in vertical and horizontal directions, the OTL discrepancies of 8 tidal constituents inverted by static PPP with different sampling rates are about 5 mm and 7 mm, respectively; the vertical OTL of 8 tidal constituents by static PPP are better than global ocean tide model, but in horizontal direction the OTL signals inverted by static PPP are slightly weaker.