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Cloud amount reported at aerodrome

The items within this code table are the cloud amount categories of operational significance for aviation as specified in Technical Regulations, Volume II (WMO-No. 49): Meteorological Services for International Air Navigation. This code table contains a subset of the cloud amount categories defined in Part B FM 94 BUFR Code Table 0 20 008. see[Cloud amount reported at aerodrome ][1]

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美国气象标准

1.低仪表LIFR气象 ----------- 云底高(指的是BROKEN多云或OVERCAST漫天云最低者)少于500英尺和或能见度小于1海里。这么说吧,这个情况对于仪表等级老司机也要叫苦了,因为这个标准略高于ILS盲降的进近标准(200-1/2),这种情况显示为紫红色。 2.仪表IFR气象: ---------- 云底高介于500/1000英尺,和或能见度介于1/3海里,它显示为红色。

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