Cesium-JulianDate

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最新推荐文章于 2025-06-08 17:31:08 发布 · 885 阅读

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Cesium中的JulianDate类用于表示天文日期，精确到秒。它存储日期的整数天数和当天的秒数。该类考虑了闰秒，并遵循国际原子时标准。成员包括静态属性leapSeconds（闰秒列表）和实例属性dayNumber（天数）、secondsOfDay（当天秒数）。addSeconds方法用于向日期添加指定秒数。

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JulianDate

new Cesium.JulianDate(julianDayNumber, secondsOfDay, timeStandard)

Represents an astronomical Julian date, which is the number of days since noon on January 1, -4712 (4713 BC). For increased precision, this class stores the whole number part of the date and the seconds part of the date in separate components. In order to be safe for arithmetic and represent leap seconds, the date is always stored in the International Atomic Time standard TimeStandard.TAI.

Name	Type	Default	Description
julianDayNumber	Number	0.0	optional The Julian Day Number representing the number of whole days. Fractional days will also be handled correctly.
secondsOfDay	Number	0.0	optional