基于潮汐调和分析的全球定位系统-多路径反射测量技术潮位预报

基于全球定位系统的多路径反射(GPS-MR)测量技术的潮位监测已经成为验潮站监测的有效补充,但较少学者利用GPS-MR反演潮位进行潮汐调和分析和预报.为了验证GPS-MR潮位预报的可能性,利用美国大陆板块边缘观测组织(PBO)提供的GPS信噪比数据进行潮位反演,将该反演结果重采样为等间隔潮位序列,利用该潮位序列计算各分潮的调和常数,并进行潮汐预报.通过与美国海洋与大气局(NOAA)提供的实测验潮数据进行对比,结果表明:GPS-MR反演潮位与验潮站实测潮位具有一致性,相关系数为0.94,均方根误差为0.16 m;经样条函数拟合后的1 h GPS-MR潮位序列预测结果同采用验潮站潮位进行预测结果精度相当,同验潮站实测潮位的均方根误差为0.14 m,相关系数为0.97.可见,利用GPS-MR技术进行潮位监测和预报是可行的.

GPS-MR Sea Level Inversion and Prediction Based on Tidal Harmonic Analysis

The use of GPS-MR for tide level monitoring has become an effective supplement for tide station monitoring, but only a few scholars have used GPS-MR for tide level inversion for tide prediction. To investigate the possibility of GPS-MR tide level prediction, this paper uses the GPS signal-to-noise ratio data provided by the Continental Plate Edge Observing Organization (PBO) to perform tide level inversion, resample the inversion results as equal-interval tide level series, calculates the harmonic constants of each tide component using the tide level series, and performs tide prediction. The results show that the GPS-MR inversion tide levels are consistent with the measured tide levels at tide stations, with a correlation coefficient of 0.94 and a root-mean-square error of 0.16 m. The result of GPS-MR tide level prediction is not different from that of tide level prediction by tidal station. The root-mean-square error of the measured tide level by tidal station is 0.14 m, and the correlation coefficient is 0.97. Therefore, it is feasible to use GPS-MR technology to monitor and forecast tide level.