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Correction of the effect of relative wind direction on wind speed derived by advanced microwave scanning radiometer

机译：先进微波扫描辐射计对相对风向对风速影响的校正

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The sea surface wind speed (SSWS) derived by a microwave radiometer can be contaminated by changes of the brightness temperature owing to the angle between the sensor azimuth and the wind direction (Relative Wind Direction effect: RWD effect). We attempt to apply the method proposed by Konda and Shibata (2004) to the SSWS derived by Advanced Microwave Scanning Radiometer (AMSR) on Advanced Earth Observing Satellite II (ADEOS-II), in order to correct for the RWD effect. The improvement of accuracy of the SSWS estimation amounts to roughly 60% of the error caused by the RWD effect. Comparison with in situ observation at the Tropical Atmosphere Ocean (TAO) array shows that the root mean square error of the corrected SSWS is 1.1 ms?1. It is found that the impact of the RWD effect on the estimation of the latent heat flux can amount to about 30 Wm?2 on average. We applied the method to the SSWS derived by AMSR for Earth Observing System (AMSR-E) and obtained a similar result.
机译：微波辐射计得出的海面风速（SSWS）可能会由于传感器方位角与风向之间的角度而导致的亮度温度变化而受到污染（相对风向效应：RWD效应）。我们尝试将Konda和Shibata（2004）提出的方法应用于高级地球观测卫星II（ADEOS-II）上的高级微波扫描辐射计（AMSR）得出的SSWS，以校正RWD效应。 SSWS估计准确性的提高大约是RWD效应引起的误差的60％。与热带大气（TAO）阵列的原位观测的比较表明，校正后的SSWS的均方根误差为1.1 ms？1。已经发现，RWD效应对潜热通量估计的影响平均可以达到约30Wm 2。我们将该方法应用于AMSR推导的地球观测系统（SSSR-E）的SSWS，并获得了相似的结果。

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