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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Retrieving cloud fraction in the field-of-view of a high-spectral resolution infrared radiometer
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Retrieving cloud fraction in the field-of-view of a high-spectral resolution infrared radiometer

机译：在高光谱分辨率红外辐射仪的视野中检索云分数

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摘要

The combination of radiance from both clear and cloudy regions of sky within the instrument's field of view (FOV) adds significant uncertainty to retrievals of atmospheric state profiles and cloud microphysical properties from infrared spectroradiometers. In this letter, we use observations of radiance from both the 8-13 and 3-5 /spl mu/m bands to retrieve estimates of the cloud fraction in the instrument's FOV, as well as microphysical cloud properties, from high-spectral-resolution infrared radiometers. Cloud fraction derived from imagers as well as high-time-resolution observations show good agreement and high correlation with our derived cloud fraction values. This is shown for both ground-based and aircraft-based observations. We also demonstrate that the use of the additional information in the 3-5 /spl mu/m band extends the dynamic range and accuracy of microphysical properties that can be retrieved from infrared radiance data.
机译：仪器视场（FOV）内天空晴朗区域和多云区域的辐射相结合，大大增加了从红外光谱仪获取大气状态剖面和云微物理特性的不确定性。在这封信中，我们使用来自8-13和3-5 / spl mu / m波段的辐射率观测值，从高光谱分辨率中检索了仪器FOV中云量的估算值以及微物理云特性红外辐射计。来自成像仪的云分率以及高分辨率的观测结果与我们得出的云分值具有很好的一致性和高度相关性。地面和飞机观测都显示了这一点。我们还证明了使用3-5 / spl mu / m波段中的附加信息扩展了可以从红外辐射数据中检索到的微物理特性的动态范围和准确性。

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