starainrt
3ffdbe0034
- 新增日食、月食、本地可见性、中心线、半影区域、SVG 图示与沙罗周期信息 - 新增行星冲合、留、方照、物理星历、视直径、相位、亮肢角、轨道节点等计算 - 新增木星伽利略卫星位置、现象与接触事件计算 - 新增恒星星表、星座判定、自行修正与观测辅助能力 - 新增 coord、formula、orbit、sundial、lite/sun、lite/moon 等扩展包 - 完善农历年号、月相英文别名、视差角、大气质量、折射、日晷与双星计算 - 增加 NASA、JPL Horizons、IMCCE 等回归测试数据与基线测试 - 重构基础算法文件组织，补充大量公开 API 注释和语义回归测试 - 更新中文和英文 README，补充示例、精度说明、SVG 配图
51 lines
1.4 KiB
Go
51 lines
1.4 KiB
Go
package eclipse
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import (
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"time"
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"b612.me/astro/basic"
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"b612.me/astro/tools"
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)
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func moonSunLoDiff(date time.Time) float64 {
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jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
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sunLo := basic.HSunApparentLo(jde)
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moonLo := basic.HMoonApparentLo(jde)
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return tools.Limit360(moonLo - sunLo)
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}
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func solarAltitude(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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return basic.SunHeight(jde, lon, lat, float64(loc)/3600.0)
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}
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func solarCulminationTime(date time.Time, lon float64) time.Time {
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jde := basic.Date2JDE(date.Add(time.Duration(-1*date.Hour())*time.Hour)) + 0.5
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_, loc := date.Zone()
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timezone := float64(loc) / 3600.0
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calcJde := basic.CulminationTime(jde, lon, timezone) - timezone/24.0
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return basic.JDE2DateByZone(calcJde, date.Location(), false)
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}
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func lunarAzimuth(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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return basic.HMoonAzimuth(jde, lon, lat, float64(loc)/3600.0)
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}
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func lunarAltitude(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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return basic.HMoonHeight(jde, lon, lat, float64(loc)/3600.0)
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}
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func lunarCulminationTime(date time.Time, lon, lat float64) time.Time {
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if date.Hour() > 12 {
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date = date.Add(-12 * time.Hour)
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}
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jde := basic.Date2JDE(date)
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_, loc := date.Zone()
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return basic.JDE2DateByZone(basic.MoonCulminationTime(jde, lon, lat, float64(loc)/3600.0), date.Location(), true)
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}
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