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首页> 外文期刊>Geoscience and Remote Sensing Letters, IEEE >Intercomparison of OSCAT Winds With Numerical-Model-Generated Winds
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Intercomparison of OSCAT Winds With Numerical-Model-Generated Winds

机译:OSCAT风与数值模型风的比较

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摘要

Subsequent to the launch of an ocean scatterometer onboard the Oceansat-2 satellite, hereby referred to as OSCAT, on September 23, 2009, the nine-month period from November 2009 to July 2010 was the validation phase for the retrieved ocean surface winds. This letter focuses on one section of the validation campaign, where the validation study for OSCAT winds with European Centre for Medium-Range Weather Forecasts (ECMWF) and National Centers for Environmental Prediction (NCEP) analyses is carried out. It is found that, in the 4–24-m/s range of wind speed, the rms error in OSCAT wind speed with ECMWF analysis is 1.4 m/s while that with NCEP analysis is 1.7 m/s. In the case of retrieved wind direction, the rms error is 17.2$^{circ}$ with ECMWF analyses, while that for NCEP is 18.8$^{circ}$ . These statistics are well within the mission goal of 2-m/s accuracy in wind speed and 20 $^{circ}$ in wind directions. This letter discusses the comparison results for different geographical regions and wind speed ranges.
机译:在2009年9月23日发射了Oceansat-2卫星(现称为OSCAT)上的海洋散射仪之后,从2009年11月到2010年7月的9个月是对回收的海面风的验证阶段。这封信的重点是验证活动的一部分,其中与欧洲中程天气预报中心(ECMWF)和国家环境预测中心(NCEP)分析一起进行了OSCAT风的验证研究。结果发现,在4-24 m / s的风速范围内,使用ECMWF分析的OSCAT风速的均方根误差为1.4 m / s,而使用NCEP分析的OSCAT风速的均方根误差为1.7 m / s。在获取风向的情况下,通过ECMWF分析得出的均方根误差为17.2 $ ^ {circ} $,而对于NCEP则为18.8 $ ^ {circ} $。这些统计数据完全符合风速精度为2 m / s和风向精度为20 ^的任务目标。这封信讨论了不同地理区域和风速范围的比较结果。

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