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首页> 外文期刊>Marine Geodesy >An Illustration of the Contribution of the TOPEX/Poseidon—Jason-1 Tandem Mission to Mesoscale Variability Studies
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An Illustration of the Contribution of the TOPEX/Poseidon—Jason-1 Tandem Mission to Mesoscale Variability Studies

机译：TOPEX /波塞冬—Jason-1串联任务对中尺度变异性研究的贡献的例证

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摘要

Almost one year of TOPEX/Poseidon (T/P) and Jason-1 data are processed to analyze the contribution of the tandem mission to mesoscale studies. To merge T/P and Jason-1 sea level anomaly (SLA) data, the main difficulty is to estimate consistent mean profiles for the two missions. An ocean variability correction is thus applied to T/P data before computing the mean profile. As a result, T/P and Jason-1 mean profile crossover differences are reduced from 4.6 cm to 1.5 cm rms only. Results from the tandem mission are then compared with those derived from Jason-1 alone and an external verification is performed with ERS-2 data. We show that, in regions with large mesoscale variability, the sea level and velocity can be mapped respectively with an accuracy of about 6% and 20 to 30% of the signal variance. Compared to Jason-1 or T/P, the tandem mission is also shown to provide a much better description of the Gulf Stream meanders and eddies and of their associated velocity field. These results are very encouraging and demonstrate the potential of an optimised two-satellite constellation for the mesoscale circulation monitoring.
机译：处理了将近一年的TOPEX / Poseidon（T / P）和Jason-1数据，以分析串联任务对中尺度研究的贡献。要合并T / P和Jason-1海平面异常（SLA）数据，主要困难是估算两个任务的一致平均剖面。因此，在计算平均剖面之前，将海洋变化性校正应用于T / P数据。结果，T / P和Jason-1平均轮廓交叉差异仅从4.6 cm rms减小到1.5 cm rms。然后将串联任务的结果与仅从Jason-1获得的结果进行比较，并使用ERS-2数据进行外部验证。我们表明，在中尺度变化较大的区域中，海平面和速度可以分别以大约6％和20％至30％信号变化的精度进行映射。与Jason-1或T / P相比，串联飞行还显示出对湾流弯道和漩涡及其相关速度场的更好描述。这些结果非常令人鼓舞，并证明了优化的两颗卫星星座用于中尺度环流监测的潜力。

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