…All observations are reported in plain text from the airport's control tower to aircraft taking off and landing, but special observations designated as special observations and scheduled observations are transmitted using the International Air Weather Reporting System (METAR system). Weather elements observed include clouds, visibility, wind, weather, temperature, and other weather-specific factors such as prevailing visibility, runway visual range (RVR), and altimeter setting. Aviation weather observations are conducted in detail because each airport has minimum weather conditions for safe takeoff and landing, and flight procedures are restricted depending on the weather conditions, even if the weather conditions are better than the minimum conditions. … *Some of the terms mentioned in "runway visual distance" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…すべての観測が飛行場の管制塔から離着陸機に対し平文で通報されるが,このうち特別観測のとくに指定されたものと定時観測は国際航空気象通報式(METAR通報式)によって送信される。観測される気象要素には雲,視程,風,天気,気温などのほか,航空気象に特有の卓越視程,滑走路視距離(RVR),高度計規正値などがある。 航空気象観測がきめ細かく行われるのは,航空機を安全に離着陸させるための最低気象条件が各飛行場で決められており,気象状態が最低気象条件より良い場合でも,飛行方式を気象状態によって制限するためである。… ※「滑走路視距離」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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