44 lines
2.3 KiB
Go
44 lines
2.3 KiB
Go
package coord
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import "b612.me/astro/formula"
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// AirmassPlaneParallelFromTrueAltitude 平行平板大气质量 / plane-parallel airmass from true altitude.
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//
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// 输入为真高度角，单位度。适合中高空几何近似，接近地平线时会发散。
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// Input is true altitude in degrees. This geometric approximation is suitable at moderate and high altitudes but diverges near the horizon.
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func AirmassPlaneParallelFromTrueAltitude(trueAltitude float64) float64 {
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return formula.AirmassPlaneParallel(trueAltitude)
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}
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// AirmassKastenYoungFromApparentAltitude Kasten-Young 大气质量 / Kasten-Young airmass from apparent altitude.
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//
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// 输入为视高度角，单位度。
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// Input is apparent altitude in degrees.
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func AirmassKastenYoungFromApparentAltitude(apparentAltitude float64) float64 {
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return formula.AirmassKastenYoung(apparentAltitude)
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}
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// AirmassPickeringFromApparentAltitude Pickering 大气质量 / Pickering airmass from apparent altitude.
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//
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// 输入为视高度角，单位度。
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// Input is apparent altitude in degrees.
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func AirmassPickeringFromApparentAltitude(apparentAltitude float64) float64 {
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return formula.AirmassPickering(apparentAltitude)
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}
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// AirmassKastenYoungFromTrueAltitude Kasten-Young 大气质量 / Kasten-Young airmass from true altitude.
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//
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// 先用 pressureHPa / temperatureC 估算大气折射，将真高度角换算为视高度角，再代入经验公式。
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// First estimates atmospheric refraction from pressureHPa and temperatureC, converts true altitude to apparent altitude, and then applies the empirical formula.
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func AirmassKastenYoungFromTrueAltitude(trueAltitude, pressureHPa, temperatureC float64) float64 {
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return formula.AirmassKastenYoung(ApparentAltitude(trueAltitude, pressureHPa, temperatureC))
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}
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// AirmassPickeringFromTrueAltitude Pickering 大气质量 / Pickering airmass from true altitude.
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//
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// 先用 pressureHPa / temperatureC 估算大气折射，将真高度角换算为视高度角，再代入经验公式。
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// First estimates atmospheric refraction from pressureHPa and temperatureC, converts true altitude to apparent altitude, and then applies the empirical formula.
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func AirmassPickeringFromTrueAltitude(trueAltitude, pressureHPa, temperatureC float64) float64 {
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return formula.AirmassPickering(ApparentAltitude(trueAltitude, pressureHPa, temperatureC))
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}
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