Algorithm for Harmonic Tidal Analysis along T/P Tracks： Taking Differences of Observed Sea Surface Heights at Adjacent Points as Observations

An algorithm （differential mode） is presented for the improvement of harmonic tidal analysis along T/P tracks, in which the differences between the observed sea surface heights at adjacent points are taken as observations. Also, the observation equations are constrained with the results of the crossover analysis; the parameter estimations are performed at 0.1° latitude intervals by the least squares. Cycle 10 to 330 T/P altimeter data covering the China Sea and the Northwest Pacific Ocean （2°-50° N,105°-150° E） are adopted for a refined along-track harmonic tidal analysis, and harmonic constants of 12 constituents in 8 474 points are obtained, which indicates that the algorithm can efficiently remove non-tidal effects in the altimeter observations, and improve the precision of tide parameters. Moreover, parameters along altimetry tracks represent a smoother distribution than those obtained by traditional algorithms. The root mean squares of the fitting errors between the tidal height model and the observations reduce from 11 cm to 1.3 cm.

一个算法(微分模式) 为沿着 T/P 的潮汐的分析追踪的泛音的改进被介绍，在哪个在邻近的点的观察海面高度之间的差别作为观察被拿。另外，观察方程与转线路分析的结果被抑制；参数估计被最少的广场在 0.1 °纬度间隔执行。盖住中国海和西北太平洋的周期 10～330 T/P 高度表数据( 2 °- 50 °N ， 105 °- 150 °E )为精制沿着轨道泛音被采用在 8 474 个点的 12 成分的潮汐的分析，和泛音常数被获得，它显示算法罐头高效地在高度表观察移开非潮汐的效果，并且改进潮参数的精确。而且，沿着测高法轨道的参数比传统的算法获得的那些代表更光滑的分布。在从 11 厘米的潮汐的高度模型和到 1.3 厘米的观察还原剂之间的恰当的错误的根平均数广场。