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
195 lines
4.7 KiB
Go
195 lines
4.7 KiB
Go
package basic
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import (
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"b612.me/astro/planet"
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. "b612.me/astro/tools"
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)
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// SunLo 太阳几何黄经
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func SunLo(jd float64) float64 {
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return planet.SunLo(jd)
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}
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func SunM(jd float64) float64 {
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return planet.SunM(jd)
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}
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/*
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@name 地球偏心率
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*/
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func Earthe(jd float64) float64 { //'地球偏心率
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return planet.Earthe(jd)
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}
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func EarthPI(jd float64) float64 { //近日點經度
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return planet.EarthPI(jd)
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}
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func SunMidFun(jd float64) float64 { //'太阳中间方程
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return planet.SunMidFun(jd)
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}
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func SunTrueLo(jd float64) float64 { // '太阳真黄经
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return planet.SunTrueLo(jd)
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}
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func SunApparentLo(jd float64) float64 { //'太阳视黄经
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return planet.SunApparentLo(jd)
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}
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func SunApparentRa(jd float64) float64 { // '太阳视赤经
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return LoToRa(jd, SunApparentLo(jd), 0)
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}
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func SunApparentRaDec(jd float64) (float64, float64) {
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return LoBoToRaDec(jd, SunApparentLo(jd), 0)
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}
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func SunTrueRa(jd float64) float64 { //'太阳真赤经
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eps := TrueObliquity(jd)
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sunTrueRa := ArcTan(Cos(eps) * Sin(SunTrueLo(jd)) / Cos(SunTrueLo(jd)))
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//Select Case SunTrueLo(JD)
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sunTrueLo := SunTrueLo(jd)
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if sunTrueLo >= 90 && sunTrueLo < 180 {
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sunTrueRa = 180 + sunTrueRa
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} else if sunTrueLo >= 180 && sunTrueLo < 270 {
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sunTrueRa = 180 + sunTrueRa
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} else if sunTrueLo >= 270 && sunTrueLo <= 360 {
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sunTrueRa = 360 + sunTrueRa
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}
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return sunTrueRa
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}
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func SunApparentDec(jd float64) float64 { // '太阳视赤纬
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t := (jd - 2451545) / 36525
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eps := TrueObliquity(jd) + 0.00256*Cos(125.04-1934.136*t)
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sunApparentDec := ArcSin(Sin(eps) * Sin(SunApparentLo(jd)))
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return sunApparentDec
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}
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func SunTrueDec(jd float64) float64 { // '太阳真赤纬
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eps := TrueObliquity(jd)
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sunTrueDec := ArcSin(Sin(eps) * Sin(SunTrueLo(jd)))
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return sunTrueDec
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}
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func SunTime(jd float64) float64 { //均时差
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tm := (SunLo(jd) - 0.0057183 - (HSunApparentRa(jd)) + (Nutation2000Bi(jd))*Cos(TrueObliquity(jd))) / 15
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if tm > 23 {
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tm = -24 + tm
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}
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return tm
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}
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func SunTimeN(jd float64, n int) float64 { //均时差
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tm := (SunLo(jd) - 0.0057183 - (HSunApparentRaN(jd, n)) + (Nutation2000Bi(jd))*Cos(TrueObliquity(jd))) / 15
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if tm > 23 {
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tm = -24 + tm
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}
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return tm
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}
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func SunSC(lo, jd float64) float64 { //黄道上的岁差，仅黄纬=0时
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t := (jd - 2451545) / 36525
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//n := 47.0029/3600*t - 0.03302/3600*t*t + 0.000060/3600*t*t*t
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//m := 174.876384/3600 - 869.8089/3600*t + 0.03536/3600*t*t
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pk := 5029.0966/3600.00*t + 1.11113/3600.00*t*t - 0.000006/3600.00*t*t*t
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return lo + pk
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}
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// 高精度，使用VSOP87
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func HSunTrueLo(jd float64) float64 {
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return HSunTrueLoN(jd, -1)
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}
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// HSunTrueLoN 高精度太阳真黄经，n<0 时取全量 VSOP 项。
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func HSunTrueLoN(jd float64, n int) float64 {
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return planet.WherePlanetN(0, 0, jd, n)
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}
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func HSunTrueBo(jd float64) float64 {
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return HSunTrueBoN(jd, -1)
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}
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// HSunTrueBoN 高精度太阳真黄纬，n<0 时取全量 VSOP 项。
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func HSunTrueBoN(jd float64, n int) float64 {
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return planet.WherePlanetN(0, 1, jd, n)
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}
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func HSunApparentLo(jd float64) float64 {
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return HSunApparentLoN(jd, -1)
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}
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func HSunApparentLoN(jd float64, n int) float64 {
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lo := HSunTrueLoN(jd, n)
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lo = lo + Nutation2000Bi(jd) + SunLoGXCN(jd, n)
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return lo
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}
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func SunLoGXC(jd float64) float64 {
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return SunLoGXCN(jd, -1)
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}
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func SunLoGXCN(jd float64, n int) float64 {
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radius := EarthAwayN(jd, n)
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return -20.49552 / radius / 3600
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}
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func EarthAway(jd float64) float64 {
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return EarthAwayN(jd, -1)
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}
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func EarthAwayN(jd float64, n int) float64 {
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return planet.WherePlanetN(0, 2, jd, n)
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}
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func HSunApparentRaDec(jd float64) (float64, float64) {
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return HSunApparentRaDecN(jd, -1)
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}
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func HSunApparentRaDecN(jd float64, n int) (float64, float64) {
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return LoBoToRaDec(jd, HSunApparentLoN(jd, n), HSunTrueBoN(jd, n))
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}
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func HSunApparentRa(jd float64) float64 { // '太阳视赤经
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return HSunApparentRaN(jd, -1)
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}
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func HSunApparentRaN(jd float64, n int) float64 { // '太阳视赤经
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return LoToRa(jd, HSunApparentLoN(jd, n), HSunTrueBoN(jd, n))
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}
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func HSunTrueRa(jd float64) float64 {
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return HSunTrueRaN(jd, -1)
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}
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func HSunTrueRaN(jd float64, n int) float64 {
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sunTrueLo := HSunTrueLoN(jd, n)
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eps := TrueObliquity(jd)
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numerator := Cos(eps) * Sin(sunTrueLo)
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denominator := Cos(sunTrueLo)
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return ArcTan2(numerator, denominator)
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}
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func HSunApparentDec(jd float64) float64 { // '太阳视赤纬
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return HSunApparentDecN(jd, -1)
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}
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func HSunApparentDecN(jd float64, n int) float64 { // '太阳视赤纬
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return ArcSin(Sin(EclipticObliquity(jd, true)) * Sin(HSunApparentLoN(jd, n)))
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}
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func HSunTrueDec(jd float64) float64 { // '太阳真赤纬
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return HSunTrueDecN(jd, -1)
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}
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func HSunTrueDecN(jd float64, n int) float64 { // '太阳真赤纬
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return ArcSin(Sin(EclipticObliquity(jd, false)) * Sin(HSunTrueLoN(jd, n)))
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}
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func Distance(jd float64) float64 { //ri di ju li
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return planet.Distance(jd)
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}
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