Radar Altimetry Derived Sea Level Anomalies – The Benefit of New Orbits and Harmonization
Radar Altimetry Derived Sea Level Anomalies – The Benefit of New Orbits and Harmonization
复制标题
雷达测高得出的海平面异常——新轨道和协调的好处
DOI：
10.1007/978-3-642-10228-8_25
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发表时间：
2010
影响因子：
2.6
通讯作者：
J. Raimondo
中科院分区：
文献类型：
--
作者：
T. Schöne;S. Esselborn;S. Rudenko;J. Raimondo
当今大多数海平面研究都使用 JASON-1 和 TOPEX/Poseidon 的最新高质量数据。之前的任务，例如 ERS-1 或 GEOSAT，显示出明显更高的噪声和错误。主要误差源之一是轨道确定。在这项研究中，使用新模型和轨道确定策略推导了新的 GEOSAT 轨道。新轨道的交叉 RMS 精度从 15 厘米 RMS 降低到 9 厘米 RMS，几乎达到 ERS-2 的水平。此外，大地测量任务和精确重复任务期间的轨道精度变得更加一致。显示了重新计算的卫星轨道对海平面异常的影响。
Most of today’s sea level studies are using the recent and high quality data of JASON-1 and TOPEX/Poseidon. Previous missions, like, e.g., ERS-1 or GEOSAT, show significant higher noise and errors. One of the main error sources is the orbit determination. In this study new GEOSAT orbits have been derived using new models and orbit determination strategies. With the new orbits the accuracy in terms of cross-over RMS is reduced from 15 to 9 cm RMS, which is almost the level of ERS-2. In addition, the orbit accuracy becomes more uniform for both the Geodetic Mission and Exact Repeat Mission period. The effects of recomputed satellite orbits on sea-level anomalies are shown.