A Validation of a Satellite Cloud Retrieval during ASTEX
A Validation of a Satellite Cloud Retrieval during ASTEX
复制标题
ASTEX 期间卫星云检索的验证
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
F. Valero
中科院分区：
文献类型：
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作者：
S. Platnick;F. Valero
摘要 1992 年 6 月 12 日，在大西洋层积云转变实验 (ASTEX) 期间，一种使用 NOAA-12 AVHRR（高级甚高分辨率辐射计）太阳反射率测量来反演云滴尺寸和光学厚度的算法已应用于亚速尔群岛附近的边界层层积云。这一天对于验证特别有利，因为卫星立交桥期间没有卷云或其他高层云，并且存在大型相对均匀的层云坞。提出了检索的不确定性估计以及算法的讨论。 AVHRR 通道 1 的飞行中绝对校准是精确光学厚度反演所必需的，通过与美国国家航空航天局 ER-2 上飞行的可见辐射计进行比较并使用层云作为共同反射率目标进行反演，同时进行反演。结果与原位微观物理结果进行比较...
Abstract An algorithm using NOAA-12 AVHRR (Advanced Very High Resolution Radiometer) solar reflectance measurements for retrieving cloud droplet size and optical thickness has been applied to a boundary layer stratocumulus cloud in the vicinity of the Azores on 12 June 1992 during the Atlantic Stratocumulus Transition Experiment (ASTEX). This day was particularly advantageous for validations because of the absence of cirrus or other higher-level clouds during the satellite overpass and the existence of a large relatively uniform stratus cloud dock. Uncertainty estimates for the retrievals are presented along with a discussion of the algorithm. An in-flight absolute calibration of AVHRR channel 1, necessary for accurate optical thickness retrievals, was done concurrently with the retrievals through comparison with a visible radiometer flown on the National Aeronautics and Space Administration's ER-2 and using the stratus cloud as the common reflectance target. Results are compared with in situ microphysica...