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首页> 外文期刊>Geoscience and Remote Sensing, IEEE Transactions on >Comparison of Ocean Surface Winds From ENVISAT ASAR, MetOp ASCAT Scatterometer, Buoy Measurements, and NOGAPS Model
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Comparison of Ocean Surface Winds From ENVISAT ASAR, MetOp ASCAT Scatterometer, Buoy Measurements, and NOGAPS Model

机译：ENVISAT ASAR，MetOp ASCAT散射仪，浮标测量和NOGAPS模型对海洋表面风的比较

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摘要

In this paper, we perform a comparison of wind speed measurements from the ENVISAT Advanced Synthetic Aperture Radar (ASAR), the MetOp-A Advanced Scatterometer (ASCAT), the U.S. National Data Buoy Center's moored buoys, and the U.S. Navy Operational Global Atmospheric Prediction System (NOGAPS) model. These comparisons were made in near U.S. coast regions over a 17-month period from March 2009 to July 2010. The ASAR wind speed retrieval agreed well with the scatterometer and model estimates, with mean differences ranging from -0.69 to 0.85 m/s and standard deviations between 1.16 and 1.77 m/s, depending upon the ASAR beam mode type. The results indicate that ASAR-derived ocean surface wind speeds are as accurate as the ASCAT and NOGAPS wind products. Comparisons between ASCAT winds and synthetic aperture radar (SAR) winds averaged at different spatial resolutions show very little change. This demonstrates that it is suitable that the scatterometer wind retrieval geophysical model function, i.e., CMOD5, is used for SAR wind retrieval. The impact of C-band VV polarization SAR calibration error on wind retrieval is also discussed.
机译：在本文中，我们对ENVISAT高级合成孔径雷达（ASAR），MetOp-A高级散射仪（ASCAT），美国国家数据浮标中心的系泊浮标以及美国海军作战全球大气预测进行的风速测量结果进行了比较。系统（NOGAPS）模型。这些比较是在2009年3月至2010年7月的17个月内，在美国近海岸地区进行的。ASAR风速反演与散射仪和模型估算值吻合得很好，平均差异范围为-0.69至0.85 m / s，取决于ASAR波束模式类型，偏差在1.16和1.77 m / s之间。结果表明，ASAR派生的海面风速与ASCAT和NOGAPS风产品一样精确。在不同的空间分辨率下，平均的ASCAT风与合成孔径雷达（SAR）风之间的比较显示出很小的变化。这表明将散射仪风场地球物理模型函数CMOD5用于SAR风场是合适的。还讨论了C波段VV极化SAR标定误差对回风的影响。

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