| 摘要: |
| 为了更好地利用卫星测高数据分析黄海和东海的潮汐特性，对1993-1999年期间的TOPEX/Poseidon测高数据进行了质量控制和共线平差处理。在此基础上．在黄海、东海选取了1738个测高点，用最小二乘拟合法计算出12个分潮的调和常数。计算得出的M2和m1分潮的调和常数，在交叉点评估的内符精度振幅分别为2.4cm和0.8cm，迟角分别为2.3°和2.5°。测高点与附近验潮站的这两个分潮结果相比，振幅的均方根误差小于4cm，而迟角相差较大。这可能与验潮站的地理环境因素有关。用卫星测高数据算得的调和常数绘制的主要分潮特性图与现有常规观测得到的相应图进行了比较．在外海深水区两者符合较好；近岸由于卫星测高误差较大，所以两者符合差。 |
| 关键词: 潮汐, 卫星高度计, TOPEX/Poseidon, 黄海, 东海 |
| DOI： |
| 分类号: |
| 基金项目:国家“九五”攀登项目，C95-04-05号；国家自然科学基金资助项目，49876001号 |
附件 |
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DONG Xiao-Jun1, MA Ji-Rui2, HUANG Cheng1, FAN Zhen-Hua2, HAN Gui-Jun2, XU Chong-Jin2
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1.Shanghai Astronomical Observatory，The Chinese Academy of Sciences，National Astronomical Observatory Center，The Chinese Academy of Sciences;2.National Marine Data and Information Service
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| Abstract: |
| To analyze the tidal characteristics of the Yellow and East China Seas by using altimetric data, quality control was carried out for all TOPEX/Poseidon Satellite altimetric data from Jan.1993 to Jun.1999, and project algorithm was used for the collinear differences. The harmonic constants of 12 tidal constituents were calculated at the 1783 altimetric data points in the study area using the leas t square fit method. The internal coincidence accuracies of the amplitudes of M2 and m1(=(K1+O1)/2) at the crossover points are 2.4 cm and 0.8cm, and the accuracies of lags are 2.3°and 2.5° respectively. Compared with tidal stations nearby the altimetric data points the differences of amplitudes of M2 and m1 are less than a 4 cm root-mean-square error, but the differences in lags are both big due to the effects of the geographical environment and topography around the stations. The cotidal charts of the major constituents from the satellite altimetric data conform well to those obtained from the routine tidal observations in the deep water an d open ocean s, but they do not conform as well as those along the coastal areas. If the TOPEX/Poseidon Setellite altimetric data are used for the open and deep oceans where there is no tidal station, and the routine observations are used for the coastal areas, the worldwide harmonic constants obtained from the combined sources will be better than those that only use either of the both data sources. Anyway, the results of tidal analysis of the worldwide should be improved effectively in this way. |
| Key words: Tide, Satellite altimeter, TOPEX/Poseidon, Yellow Sea, East China Sea |
