51 lines
1.4 KiB
Go
51 lines
1.4 KiB
Go
|
package eclipse
|
||
|
|
|
||
|
|
import (
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"b612.me/astro/basic"
|
||
|
|
"b612.me/astro/tools"
|
||
|
|
)
|
||
|
|
|
||
|
|
func moonSunLoDiff(date time.Time) float64 {
|
||
|
|
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
|
||
|
|
sunLo := basic.HSunApparentLo(jde)
|
||
|
|
moonLo := basic.HMoonApparentLo(jde)
|
||
|
|
return tools.Limit360(moonLo - sunLo)
|
||
|
|
}
|
||
|
|
|
||
|
|
func solarAltitude(date time.Time, lon, lat float64) float64 {
|
||
|
|
jde := basic.Date2JDE(date)
|
||
|
|
_, loc := date.Zone()
|
||
|
|
return basic.SunHeight(jde, lon, lat, float64(loc)/3600.0)
|
||
|
|
}
|
||
|
|
|
||
|
|
func solarCulminationTime(date time.Time, lon float64) time.Time {
|
||
|
|
jde := basic.Date2JDE(date.Add(time.Duration(-1*date.Hour())*time.Hour)) + 0.5
|
||
|
|
_, loc := date.Zone()
|
||
|
|
timezone := float64(loc) / 3600.0
|
||
|
|
calcJde := basic.CulminationTime(jde, lon, timezone) - timezone/24.0
|
||
|
|
return basic.JDE2DateByZone(calcJde, date.Location(), false)
|
||
|
|
}
|
||
|
|
|
||
|
|
func lunarAzimuth(date time.Time, lon, lat float64) float64 {
|
||
|
|
jde := basic.Date2JDE(date)
|
||
|
|
_, loc := date.Zone()
|
||
|
|
return basic.HMoonAzimuth(jde, lon, lat, float64(loc)/3600.0)
|
||
|
|
}
|
||
|
|
|
||
|
|
func lunarAltitude(date time.Time, lon, lat float64) float64 {
|
||
|
|
jde := basic.Date2JDE(date)
|
||
|
|
_, loc := date.Zone()
|
||
|
|
return basic.HMoonHeight(jde, lon, lat, float64(loc)/3600.0)
|
||
|
|
}
|
||
|
|
|
||
|
|
func lunarCulminationTime(date time.Time, lon, lat float64) time.Time {
|
||
|
|
if date.Hour() > 12 {
|
||
|
|
date = date.Add(-12 * time.Hour)
|
||
|
|
}
|
||
|
|
jde := basic.Date2JDE(date)
|
||
|
|
_, loc := date.Zone()
|
||
|
|
return basic.JDE2DateByZone(basic.MoonCulminationTime(jde, lon, lat, float64(loc)/3600.0), date.Location(), true)
|
||
|
|
}
|