48 lines
2.4 KiB
Go
48 lines
2.4 KiB
Go
package coord
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import (
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"time"
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"b612.me/astro/basic"
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)
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// AtmosphericRefractionFromTrueAltitude 真高度角折射修正 / atmospheric refraction from true altitude.
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//
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// 输入真高度角，返回应加到真高度角上的大气折射修正量，单位度。
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// Takes true altitude and returns the atmospheric-refraction correction to be added to it, in degrees.
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func AtmosphericRefractionFromTrueAltitude(trueAltitude, pressureHPa, temperatureC float64) float64 {
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return basic.RefractionFromTrueAltitude(trueAltitude, pressureHPa, temperatureC)
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}
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// AtmosphericRefractionFromApparentAltitude 视高度角折射修正 / atmospheric refraction from apparent altitude.
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//
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// 输入视高度角，返回对应的大气折射修正量，单位度。
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// Takes apparent altitude and returns the corresponding atmospheric-refraction correction, in degrees.
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func AtmosphericRefractionFromApparentAltitude(apparentAltitude, pressureHPa, temperatureC float64) float64 {
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return basic.RefractionFromApparentAltitude(apparentAltitude, pressureHPa, temperatureC)
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}
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// ApparentAltitude 真高度角转视高度角 / apparent altitude from true altitude.
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//
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// 输入真高度角，返回加入标准大气折射后的视高度角，单位度。
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// Takes true altitude and returns the apparent altitude after applying standard atmospheric refraction, in degrees.
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func ApparentAltitude(trueAltitude, pressureHPa, temperatureC float64) float64 {
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return basic.ApparentAltitude(trueAltitude, pressureHPa, temperatureC)
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}
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// TrueAltitude 视高度角转真高度角 / true altitude from apparent altitude.
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//
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// 输入视高度角，返回去除大气折射后的真高度角，单位度。
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// Takes apparent altitude and returns the true altitude after removing atmospheric refraction, in degrees.
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func TrueAltitude(apparentAltitude, pressureHPa, temperatureC float64) float64 {
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return basic.TrueAltitude(apparentAltitude, pressureHPa, temperatureC)
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}
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// EquatorialToApparentHorizontal 赤道坐标转视地平坐标 / converts equatorial coordinates to apparent horizontal coordinates.
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func EquatorialToApparentHorizontal(date time.Time, ra, dec, observerLon, observerLat, pressureHPa, temperatureC float64) Horizontal {
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horizontal := EquatorialToHorizontal(date, ra, dec, observerLon, observerLat)
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horizontal.Altitude = basic.ApparentAltitude(horizontal.Altitude, pressureHPa, temperatureC)
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horizontal.Zenith = 90 - horizontal.Altitude
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return horizontal
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}
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