网络释义专业释义英英释义
... longitude by account 积算经度 longitude by chronometer 时间求经度 longitude by dead reckoning 积算经度 ...
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Longitude by chronometer
- abstract: Longitude by chronometer, is an astronomical method of calculating the longitude at which a position line, drawn from a sight by sextant of any celestial body, crosses the observer's assumed latitude. In order to calculate the position line, the time of the sight must be known so that the celestial position i.
以上来源于: WordNet
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