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Validation of an 8-14 (mu)m cloud monitor using visual observations of antarctic cloud cover

机译:使用南极云层的目视观测对8-14μm云监测仪进行验证

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摘要

A cloud monitor instrument, sensing 8-14 (mu)m infrared radiation, has been installed near McMurdo, Antarctica, in order to provide supporting cloud cover information for a high-resolution sky-viewing Fabry-Perot spectrometer experiment. Validation of the cloud monitor observations was performed by a 1 year long comparison with the available 6 h visual cloud observations, expressed in octas (obscured eighths of the sky). The agreement between visual observations and those of the cloud monitor is good--the variation being slightly over one step, or octa--except at the clear sky extreme, which the subjective visual observations tend to overestimate during dark and moonless conditions. Both visual observations and the cloud monitor measurements show an austral winter-summer difference with the winter being clearer.
机译:在南极的麦克默多附近安装了一种可监测8-14μm红外辐射的云监测仪,以便为高分辨率的法布里-珀罗光谱仪实验提供支持的云层信息。通过与可用的6小时视觉云观测值进行1年的比较,对云监控器观测值进行了验证,以八度为单位(遮挡了八分之一的天空)。视觉观察与云监视器的观察之间的一致性很好-变化仅一步之遥或八分之一即可-除了在晴朗的极端天空下,主观视觉观察在黑暗和无月的情况下往往高估了这一点。目视观测和云监测仪测量均显示了冬夏的南半球差异,冬季更加晴朗。

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