fixed dependencies
This commit is contained in:
nuknal
275
vendor/github.com/starainrt/astro/sun/sun.go
generated
vendored
Normal file
275
vendor/github.com/starainrt/astro/sun/sun.go
generated
vendored
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@@ -0,0 +1,275 @@
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package sun
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import (
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"errors"
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"math"
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"time"
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"github.com/starainrt/astro/basic"
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)
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var (
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ERR_SUN_NEVER_RISE = errors.New("ERROR:极夜，太阳在今日永远在地平线下！")
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ERR_SUN_NEVER_DOWN = errors.New("ERROR:极昼，太阳在今日永远在地平线上！")
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ERR_TWILIGHT_NOT_EXISTS = errors.New("ERROR:今日晨昏朦影不存在！")
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)
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/*
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太阳
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视星等 −26.74
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绝对星等 4.839
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光谱类型 G2V
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金属量 Z = 0.0122
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角直径 31.6′ – 32.7′
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*/
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// RiseTime 太阳升起时间
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// date，取日期，时区忽略
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// lon，经度，东正西负
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// lat，纬度，北正南负
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// height，高度
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// aero，true时进行大气修正
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func RiseTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, error) {
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var err error
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var aeroFloat float64
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if aero {
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aeroFloat = 1
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}
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if date.Hour() > 12 {
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date = date.Add(time.Hour * -12)
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}
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jde := basic.Date2JDE(date)
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_, loc := date.Zone()
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timezone := float64(loc) / 3600.0
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riseJde := basic.GetSunRiseTime(jde, lon, lat, timezone, aeroFloat, height)
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if riseJde == -2 {
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err = ERR_SUN_NEVER_RISE
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}
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if riseJde == -1 {
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err = ERR_SUN_NEVER_DOWN
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}
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return basic.JDE2DateByZone(riseJde, date.Location(), true), err
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}
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// SunDownTime 太阳落下时间
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// date，当地时区日期，务必做时区修正
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// lon，经度，东正西负
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// lat，纬度，北正南负
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// height，高度
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// aero，true时进行大气修正
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func DownTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, error) {
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var err error
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var aeroFloat float64
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if aero {
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aeroFloat = 1
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}
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if date.Hour() > 12 {
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date = date.Add(time.Hour * -12)
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}
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jde := basic.Date2JDE(date)
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_, loc := date.Zone()
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timezone := float64(loc) / 3600.0
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downJde := basic.GetSunDownTime(jde, lon, lat, timezone, aeroFloat, height)
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if downJde == -2 {
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err = ERR_SUN_NEVER_RISE
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}
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if downJde == -1 {
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err = ERR_SUN_NEVER_DOWN
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}
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return basic.JDE2DateByZone(downJde, date.Location(), true), err
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}
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// MorningTwilight 晨朦影
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// date，当地时区日期
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// lon，经度，东正西负
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// lat，纬度，北正南负
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// angle，朦影角度：可选-6 -12 -18(民用、航海、天文)
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func MorningTwilight(date time.Time, lon, lat, angle float64) (time.Time, error) {
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var err error
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if date.Hour() > 12 {
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date = date.Add(time.Hour * -12)
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}
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jde := basic.Date2JDE(date)
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_, loc := date.Zone()
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timezone := float64(loc) / 3600.0
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calcJde := basic.GetAsaTime(jde, lon, lat, timezone, angle)
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if calcJde == -2 {
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err = ERR_TWILIGHT_NOT_EXISTS
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}
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if calcJde == -1 {
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err = ERR_TWILIGHT_NOT_EXISTS
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}
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return basic.JDE2Date(calcJde), err
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}
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// EveningTwilight 昏朦影
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// date，当地时区日期
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// lon，经度，东正西负
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// lat，纬度，北正南负
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// angle，朦影角度：可选-6 -12 -18(民用、航海、天文)
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func EveningTwilight(date time.Time, lon, lat, angle float64) (time.Time, error) {
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var err error
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if date.Hour() > 12 {
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date = date.Add(time.Hour * -12)
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}
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jde := basic.Date2JDE(date)
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_, loc := date.Zone()
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timezone := float64(loc) / 3600.0
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//不需要进行力学时转换，会在GetBanTime中转换
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calcJde := basic.GetBanTime(jde, lon, lat, timezone, angle)
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if calcJde == -2 {
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err = ERR_TWILIGHT_NOT_EXISTS
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}
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if calcJde == -1 {
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err = ERR_TWILIGHT_NOT_EXISTS
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}
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return basic.JDE2Date(calcJde), err
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}
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// EclipticObliquity 黄赤交角
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// 返回date对应UTC世界时的黄赤交角，nutation为true时，计算交角章动
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func EclipticObliquity(date time.Time, nutation bool) float64 {
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//转换为UTC时间
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jde := basic.Date2JDE(date.UTC())
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//进行力学时转换
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jde = basic.TD2UT(jde, true)
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//黄赤交角计算
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return basic.EclipticObliquity(jde, nutation)
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}
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// EclipticNutation 黄经章动
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// 返回date对应UTC世界时的黄经章动
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func EclipticNutation(date time.Time) float64 {
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//转换为UTC时间
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jde := basic.Date2JDE(date.UTC())
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//进行力学时转换与章动计算
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return basic.HJZD(basic.TD2UT(jde, true))
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}
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// AxialtiltNutation 交角章动
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// 返回date对应UTC世界时的交角章动
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func AxialtiltNutation(date time.Time) float64 {
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//转换为UTC时间
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jde := basic.Date2JDE(date.UTC())
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//进行力学时转换与章动计算
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return basic.JJZD(basic.TD2UT(jde, true))
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}
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// GeometricLo 太阳几何黄经
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// 返回date对应UTC世界时的太阳几何黄经
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func GeometricLo(date time.Time) float64 {
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//转换为UTC时间
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jde := basic.Date2JDE(date.UTC())
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return basic.SunLo(basic.TD2UT(jde, true))
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}
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// TrueLo 太阳真黄经
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// 返回date对应UTC世界时的太阳真黄经
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func TrueLo(date time.Time) float64 {
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//转换为UTC时间
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jde := basic.Date2JDE(date.UTC())
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return basic.HSunTrueLo(basic.TD2UT(jde, true))
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}
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// TrueBo 太阳真黄纬
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// 返回date对应UTC世界时的太阳真黄纬
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func TrueBo(date time.Time) float64 {
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//转换为UTC时间
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jde := basic.Date2JDE(date.UTC())
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return basic.HSunTrueLo(basic.TD2UT(jde, true))
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}
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// ApparentLo 太阳视黄经
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// 返回date对应UTC世界时的太阳视黄经
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func ApparentLo(date time.Time) float64 {
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//转换为UTC时间
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jde := basic.Date2JDE(date.UTC())
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return basic.HSunApparentLo(basic.TD2UT(jde, true))
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}
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// ApparentRa 太阳地心视赤经
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// 返回date对应UTC世界时的太阳视赤经（使用黄道坐标转换，且默认忽略黄纬）
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func ApparentRa(date time.Time) float64 {
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//转换为UTC时间
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jde := basic.Date2JDE(date.UTC())
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return basic.HSunApparentRa(basic.TD2UT(jde, true))
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}
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// ApparentDec 太阳地心视赤纬
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// 返回date对应UTC世界时的太阳视赤纬（使用黄道坐标转换，且默认忽略黄纬）
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func ApparentDec(date time.Time) float64 {
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//转换为UTC时间
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jde := basic.Date2JDE(date.UTC())
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return basic.HSunApparentDec(basic.TD2UT(jde, true))
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}
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// ApparentRaDec 太阳地心视赤经和赤纬
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// 返回date对应UTC世界时的太阳视赤纬（使用黄道坐标转换，且默认忽略黄纬）
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func ApparentRaDec(date time.Time) (float64, float64) {
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//转换为UTC时间
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jde := basic.Date2JDE(date.UTC())
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return basic.HSunApparentRaDec(basic.TD2UT(jde, true))
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}
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// MidFunc 太阳中间方程
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func MidFunc(date time.Time) float64 {
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//转换为UTC时间
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jde := basic.Date2JDE(date.UTC())
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return basic.SunMidFun(basic.TD2UT(jde, true))
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}
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// EquationTime 均时差
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// 返回date对应UTC世界时的均时差
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func EquationTime(date time.Time) float64 {
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//转换为UTC时间
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jde := basic.Date2JDE(date.UTC())
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return basic.SunTime(basic.TD2UT(jde, true))
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}
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// HourAngle 太阳时角
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// 返回给定经纬度、对应date时区date时刻的太阳时角（
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func HourAngle(date time.Time, lon, lat float64) float64 {
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jde := basic.Date2JDE(date)
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_, loc := date.Zone()
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timezone := float64(loc) / 3600.0
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return basic.SunTimeAngle(jde, lon, lat, timezone)
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}
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// Azimuth 太阳方位角
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// 返回给定经纬度、对应date时区date时刻的太阳方位角（正北为0，向东增加）
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func Azimuth(date time.Time, lon, lat float64) float64 {
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jde := basic.Date2JDE(date)
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_, loc := date.Zone()
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timezone := float64(loc) / 3600.0
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return basic.SunAngle(jde, lon, lat, timezone)
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}
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// Zenith 太阳高度角
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// 返回给定经纬度、对应date时区date时刻的太阳高度角
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func Zenith(date time.Time, lon, lat float64) float64 {
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jde := basic.Date2JDE(date)
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_, loc := date.Zone()
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timezone := float64(loc) / 3600.0
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return basic.SunHeight(jde, lon, lat, timezone)
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}
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// CulminationTime 太阳中天时间
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// 返回给定经纬度、对应date时区date时刻的太阳中天日期
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func CulminationTime(date time.Time, lon float64) time.Time {
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jde := basic.Date2JDE(date)
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if jde-math.Floor(jde) > 0.5 {
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jde++
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}
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_, loc := date.Zone()
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timezone := float64(loc) / 3600.0
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calcJde := basic.GetSunTZTime(jde, lon, timezone) - timezone/24.00
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return basic.JDE2DateByZone(calcJde, date.Location(), false)
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}
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// EarthDistance 日地距离
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// 返回date对应UTC世界时日地距离
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func EarthDistance(date time.Time) float64 {
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jde := basic.Date2JDE(date.UTC())
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jde = basic.TD2UT(jde, true)
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return basic.EarthAway(jde)
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}
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