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astro/mars/mars.go

241 lines
7.4 KiB
Go

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package mars
import (
"b612.me/astro/basic"
"b612.me/astro/calendar"
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"b612.me/astro/planet"
"errors"
"time"
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)
var (
ERR_MARS_NEVER_RISE = errors.New("ERROR:极夜,火星今日永远在地平线下!")
ERR_MARS_NEVER_DOWN = errors.New("ERROR:极昼,火星今日永远在地平线上!")
)
// ApparentLo 视黄经
func ApparentLo(date time.Time) float64 {
jde := calendar.Date2JDE(date)
return basic.MarsApparentLo(basic.TD2UT(jde, true))
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}
// ApparentBo 视黄纬
func ApparentBo(date time.Time) float64 {
jde := calendar.Date2JDE(date)
return basic.MarsApparentBo(basic.TD2UT(jde, true))
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}
// ApparentRa 视赤经
func ApparentRa(date time.Time) float64 {
jde := calendar.Date2JDE(date)
return basic.MarsApparentRa(basic.TD2UT(jde, true))
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}
// ApparentDec 视赤纬
func ApparentDec(date time.Time) float64 {
jde := calendar.Date2JDE(date)
return basic.MarsApparentDec(basic.TD2UT(jde, true))
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}
// ApparentRaDec 视赤经赤纬
func ApparentRaDec(date time.Time) (float64, float64) {
jde := calendar.Date2JDE(date)
return basic.MarsApparentRaDec(basic.TD2UT(jde, true))
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}
// ApparentMagnitude 视星等
func ApparentMagnitude(date time.Time) float64 {
jde := calendar.Date2JDE(date)
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return basic.MarsMag(basic.TD2UT(jde, true))
}
// EarthDistance 与地球距离(天文单位)
func EarthDistance(date time.Time) float64 {
jde := calendar.Date2JDE(date)
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return basic.EarthMarsAway(basic.TD2UT(jde, true))
}
// EarthDistance 与太阳距离(天文单位)
func SunDistance(date time.Time) float64 {
jde := calendar.Date2JDE(date)
return planet.WherePlanet(3, 2, basic.TD2UT(jde, true))
}
// Zenith 高度角
func Zenith(date time.Time, lon, lat float64) float64 {
jde := basic.Date2JDE(date)
_, loc := date.Zone()
timezone := float64(loc) / 3600.0
return basic.MarsHeight(jde, lon, lat, timezone)
}
// Azimuth 方位角
func Azimuth(date time.Time, lon, lat float64) float64 {
jde := basic.Date2JDE(date)
_, loc := date.Zone()
timezone := float64(loc) / 3600.0
return basic.MarsAzimuth(jde, lon, lat, timezone)
}
// HourAngle 时角
// 返回给定经纬度、对应date时区date时刻的时角
func HourAngle(date time.Time, lon float64) float64 {
jde := basic.Date2JDE(date)
_, loc := date.Zone()
timezone := float64(loc) / 3600.0
return basic.MarsHourAngle(jde, lon, timezone)
}
// CulminationTime 中天时间
// 返回给定经纬度、对应date时区date时刻的中天日期
func CulminationTime(date time.Time, lon float64) time.Time {
if date.Hour() > 12 {
date = date.Add(time.Hour * -12)
}
jde := basic.Date2JDE(date)
_, loc := date.Zone()
timezone := float64(loc) / 3600.0
calcJde := basic.MarsCulminationTime(jde, lon, timezone) - timezone/24.00
return basic.JDE2DateByZone(calcJde, date.Location(), false)
}
// RiseTime 升起时间
// date取日期时区忽略
// lon经度东正西负
// lat纬度北正南负
// height高度
// aerotrue时进行大气修正
func RiseTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, error) {
var err error
var aeroFloat float64
if aero {
aeroFloat = 1
}
if date.Hour() > 12 {
date = date.Add(time.Hour * -12)
}
jde := basic.Date2JDE(date)
_, loc := date.Zone()
timezone := float64(loc) / 3600.0
riseJde := basic.MarsRiseTime(jde, lon, lat, timezone, aeroFloat, height)
if riseJde == -2 {
err = ERR_MARS_NEVER_RISE
}
if riseJde == -1 {
err = ERR_MARS_NEVER_DOWN
}
return basic.JDE2DateByZone(riseJde, date.Location(), true), err
}
// DownTime 落下时间
// date取日期时区忽略
// lon经度东正西负
// lat纬度北正南负
// height高度
// aerotrue时进行大气修正
func DownTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, error) {
var err error
var aeroFloat float64
if aero {
aeroFloat = 1
}
if date.Hour() > 12 {
date = date.Add(time.Hour * -12)
}
jde := basic.Date2JDE(date)
_, loc := date.Zone()
timezone := float64(loc) / 3600.0
riseJde := basic.MarsDownTime(jde, lon, lat, timezone, aeroFloat, height)
if riseJde == -2 {
err = ERR_MARS_NEVER_RISE
}
if riseJde == -1 {
err = ERR_MARS_NEVER_DOWN
}
return basic.JDE2DateByZone(riseJde, date.Location(), true), err
}
// LastConjunction 上次合日时间
// 返回上次合日时间
func LastConjunction(date time.Time) time.Time {
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
return basic.JDE2DateByZone(basic.LastMarsConjunction(jde), date.Location(), false)
}
// NextConjunction 下次合日时间
// 返回下次合日时间
func NextConjunction(date time.Time) time.Time {
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
return basic.JDE2DateByZone(basic.NextMarsConjunction(jde), date.Location(), false)
}
// LastOpposition 上次冲日时间
// 返回上次冲日时间
func LastOpposition(date time.Time) time.Time {
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
return basic.JDE2DateByZone(basic.LastMarsOpposition(jde), date.Location(), false)
}
// NextOpposition 下次冲日时间
// 返回下次冲日时间
func NextOpposition(date time.Time) time.Time {
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
return basic.JDE2DateByZone(basic.NextMarsOpposition(jde), date.Location(), false)
}
// LastProgradeToRetrograde 上次留(顺转逆)
// 返回上次顺转逆留的时间
func LastProgradeToRetrograde(date time.Time) time.Time {
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
return basic.JDE2DateByZone(basic.LastMarsProgradeToRetrograde(jde), date.Location(), false)
}
// NextProgradeToRetrograde 下次留(顺转逆)
// 返回下次顺转逆留的时间
func NextProgradeToRetrograde(date time.Time) time.Time {
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
return basic.JDE2DateByZone(basic.NextMarsProgradeToRetrograde(jde), date.Location(), false)
}
// LastRetrogradeToPrograde 上次留(逆转瞬)
// 返回上次逆转瞬留的时间
func LastRetrogradeToPrograde(date time.Time) time.Time {
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
return basic.JDE2DateByZone(basic.LastMarsRetrogradeToPrograde(jde), date.Location(), false)
}
// NextRetrogradeToPrograde 上次留(逆转瞬)
//// 返回上次逆转瞬留的时间
func NextRetrogradeToPrograde(date time.Time) time.Time {
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
return basic.JDE2DateByZone(basic.NextMarsRetrogradeToPrograde(jde), date.Location(), false)
}
// LastEasternQuadrature 上次东方照时间
// 返回上次东方照时间
func LastEasternQuadrature(date time.Time) time.Time {
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
return basic.JDE2DateByZone(basic.LastMarsEasternQuadrature(jde), date.Location(), false)
}
// NextEasternQuadrature 下次东方照时间
// 返回下次东方照时间
func NextEasternQuadrature(date time.Time) time.Time {
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
return basic.JDE2DateByZone(basic.NextMarsEasternQuadrature(jde), date.Location(), false)
}
// LastWesternQuadrature 上次西方照时间
// 返回上次西方照时间
func LastWesternQuadrature(date time.Time) time.Time {
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
return basic.JDE2DateByZone(basic.LastMarsWesternQuadrature(jde), date.Location(), false)
}
// NextWesternQuadrature 下次西方照时间
// 返回下次西方照时间
func NextWesternQuadrature(date time.Time) time.Time {
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
return basic.JDE2DateByZone(basic.NextMarsWesternQuadrature(jde), date.Location(), false)
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}