2019-10-24 10:44:21 +08:00
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package earth
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import (
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2020-07-14 15:38:51 +08:00
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"time"
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2019-10-24 10:44:21 +08:00
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"b612.me/astro/basic"
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)
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2026-05-01 22:38:44 +08:00
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// EarthEccentricity 地球轨道偏心率 / orbital eccentricity of Earth.
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//
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// 返回 date 对应绝对时刻的地球轨道偏心率,无量纲。
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// Returns Earth's orbital eccentricity at the instant represented by date; the value is dimensionless.
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2020-07-14 15:38:51 +08:00
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func EarthEccentricity(date time.Time) float64 {
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jde := basic.Date2JDE(date.UTC())
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2019-10-24 10:44:21 +08:00
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return basic.Earthe(basic.TD2UT(jde, true))
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}
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