1884年，国际子午线大会确立了格林威治标准时间（GMT），即伦敦附近的格林威治皇家气象台（the Royal Observatory in Greenwich）的平均太阳时间。
The International Meridien Conference of 1884 established Greenwich Mean Time, referring to the mean solar time at the Royal Observatory in Greenwich, near London.
直到1968年，格林威治子午线时间是全英国的标准时间。
Greenwich is known because Greenwich time, the time for the meridian of Greenwich, was, until 1968, standard time in Britain.
人工子午线是民用飞机适航性标准中磁影响试验的设备。
Artificial meridian is a test apparatus for magnetic effects in airworthiness standards of civil planes.
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