longitude [i l1nd[qtJ):d | l9nd[itj):d ]    (¼øÀ§: 7398 - ´ëÇÐ ¼öÁØ)  
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Mean Angular distance on the earth's surface, measured east or west from the prime meridian at Greenwich, England, to the meridian passing through a position, expressed in degrees (or hours), minutes, and seconds.
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