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General Information 1100 General
Minimum Chart Requirements
Utilization of Data
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9SPSpSpSp air mass Air Weather Service aircraft AIREP altitude analysis areas AWSM back from reported barbs Celsius cloud code figure color constant pressure charts dew point temperature direction shaft drawn for zero dropsonde element gives entered entry evenly divisible flight level free air temperature freezing level Group height inch independent unit commanders indi indicated isallobars isobar Isotach knots labeled legend longitude maximum wind meters millibars minus signs nautical miles Nddff nearest Northern Hemisphere observation optional past positions Plot this element plotted as reported plotting model POMAR ported positions of fronts positions of pressure prescribed pressure centers pressure change prognostic charts projected position Q code Radiosonde RECCO relative humidity reported position saturation pressure sferics snow Southern Hemisphere specifications station circle Synoptic Code TdTd temperature change tion tropical cyclones tropopause upper wind reports WBAN wet-bulb temperature wind direction wind speed WMO Region