时间：2011-04-18 00:52来源：蓝天飞行翻译 作者：航空 点击：次
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Tower/surface visibility. If either visi-bility (tower or surface) is below four statute miles, the lesser of the two will be reported in the body of the report; the greater will be reported in remarks. (b)Automated visibility. ASOS visibility stations will show visibility ten or greater than ten miles as “10SM.” AWOS visibility stations will show visibility less than 1/4 statute mile as “M1/4SM” and visibility ten or greater than ten miles as “10SM.” (c)Variable visibility. Variable visibility is shown in remarks (when rapid increase or decrease by 1/2 statute mile or more and the average prevailing visibility is less than three miles) e.g., VIS 1V2 “visibility variable between one and two.” (d)Sector visibility. Sector visibility is shown in remarks when it differs from the prevailing visibility, and either the prevailing or sector visibility is less than three miles. EXAMPLE. VIS N2 . visibility north two 7. Runway Visual Range (When Reported). “R” identifies the group followed by the runway heading (and parallel runway designator, if needed) “/” and the visual range in feet (meters in other countries) followed with “FT” (feet is not spoken). (a)Variability Values. When RVR varies (by more than on reportable value), the lowest and highest values are shown with “V” between them. (b)Maximum/Minimum Range. “P” indi-cates an observed RVR is above the maximum value for this system (spoken as “more than”). “M” indicates an observed RVR is below the minimum value which can be determined by the system (spoken as “less than”). EXAMPLE. R32L/1200FT . runway three two left R.V.R one thousand two hundred. R27R/M1000V4000FT . runway two seven right R.V.R variable from less than one thousand to four thousand. 7.1.62 Meteorology 8. Weather Phenomena. The weather as reported in the METAR code represents a significant change in the way weather is currently reported. In METAR, weather is reported in the format: Intensity/Proximity/Descriptor/Precipitation/ Obstruction to visibility/Other NOTE. The “/” above and in the following descriptions (except as the separator between the temperature and dew point) are for separation purposes in this publication and do not appear in the actual METARs. (a)Intensity applies only to the first type of precipitation reported. A “.” denotes light, no symbol denotes moderate, and a “+” denotes heavy. (b)Proximity applies to and reported only for weather occurring in the vicinity of the airport (between 5 and 10 miles of the point(s) of observation). It is denoted by the letters “VC.” (Intensity and “VC” will not appear together in the weather group). (c) Descriptor. These eight descriptors ap- |
