31 lines
929 B
Go
31 lines
929 B
Go
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package mars
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import (
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"time"
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"b612.me/astro/basic"
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"b612.me/astro/calendar"
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)
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// Semidiameter 火星视半径，单位角秒 / apparent Mars semidiameter in arcseconds.
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func Semidiameter(date time.Time) float64 {
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return SemidiameterN(date, -1)
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}
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// SemidiameterN 火星视半径（截断版），单位角秒 / truncated apparent Mars semidiameter in arcseconds.
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func SemidiameterN(date time.Time, n int) float64 {
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jde := calendar.Date2JDE(date.UTC())
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return basic.MarsSemidiameterN(basic.TD2UT(jde, true), n)
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}
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// Diameter 火星视直径，单位角秒 / apparent Mars diameter in arcseconds.
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func Diameter(date time.Time) float64 {
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return DiameterN(date, -1)
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}
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// DiameterN 火星视直径（截断版），单位角秒 / truncated apparent Mars diameter in arcseconds.
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func DiameterN(date time.Time, n int) float64 {
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jde := calendar.Date2JDE(date.UTC())
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return basic.MarsDiameterN(basic.TD2UT(jde, true), n)
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}
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