feat: 完善时标与天象几何计算并扩展输出接口
- 新增时标、ΔT 模型、质心时间与 UT1 支持 - 改进日月食、月掩、行星事件及路径边界计算 - 完善恒星三维自行与动态距离传播 - 扩展 SVG、GeoJSON、KML 输出与底层距离换算工具 - 整理中英文手册、示例资源及回归测试
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+61
-61
@@ -7,79 +7,79 @@ import (
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. "b612.me/astro/tools"
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)
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func SaturnL(jd float64) float64 {
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return planet.WherePlanet(5, 0, jd)
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func SaturnL(jde float64) float64 {
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return planet.WherePlanet(5, 0, jde)
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}
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func SaturnB(jd float64) float64 {
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return planet.WherePlanet(5, 1, jd)
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func SaturnB(jde float64) float64 {
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return planet.WherePlanet(5, 1, jde)
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}
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func SaturnR(jd float64) float64 {
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return planet.WherePlanet(5, 2, jd)
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func SaturnR(jde float64) float64 {
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return planet.WherePlanet(5, 2, jde)
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}
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func ASaturnX(jd float64) float64 {
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l := SaturnL(jd)
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b := SaturnB(jd)
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r := SaturnR(jd)
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el := planet.WherePlanet(-1, 0, jd)
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eb := planet.WherePlanet(-1, 1, jd)
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er := planet.WherePlanet(-1, 2, jd)
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func ASaturnX(jde float64) float64 {
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l := SaturnL(jde)
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b := SaturnB(jde)
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r := SaturnR(jde)
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el := planet.WherePlanet(-1, 0, jde)
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eb := planet.WherePlanet(-1, 1, jde)
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er := planet.WherePlanet(-1, 2, jde)
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x := r*Cos(b)*Cos(l) - er*Cos(eb)*Cos(el)
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return x
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}
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func ASaturnY(jd float64) float64 {
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func ASaturnY(jde float64) float64 {
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l := SaturnL(jd)
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b := SaturnB(jd)
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r := SaturnR(jd)
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el := planet.WherePlanet(-1, 0, jd)
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eb := planet.WherePlanet(-1, 1, jd)
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er := planet.WherePlanet(-1, 2, jd)
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l := SaturnL(jde)
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b := SaturnB(jde)
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r := SaturnR(jde)
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el := planet.WherePlanet(-1, 0, jde)
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eb := planet.WherePlanet(-1, 1, jde)
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er := planet.WherePlanet(-1, 2, jde)
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y := r*Cos(b)*Sin(l) - er*Cos(eb)*Sin(el)
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return y
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}
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func ASaturnZ(jd float64) float64 {
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//l := SaturnL(jd)
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b := SaturnB(jd)
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r := SaturnR(jd)
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// el := planet.WherePlanet(-1, 0, jd)
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eb := planet.WherePlanet(-1, 1, jd)
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er := planet.WherePlanet(-1, 2, jd)
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func ASaturnZ(jde float64) float64 {
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//l := SaturnL(jde)
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b := SaturnB(jde)
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r := SaturnR(jde)
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// el := planet.WherePlanet(-1, 0, jde)
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eb := planet.WherePlanet(-1, 1, jde)
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er := planet.WherePlanet(-1, 2, jde)
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z := r*Sin(b) - er*Sin(eb)
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return z
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}
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func ASaturnXYZ(jd float64) (float64, float64, float64) {
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l := SaturnL(jd)
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b := SaturnB(jd)
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r := SaturnR(jd)
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el := planet.WherePlanet(-1, 0, jd)
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eb := planet.WherePlanet(-1, 1, jd)
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er := planet.WherePlanet(-1, 2, jd)
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func ASaturnXYZ(jde float64) (float64, float64, float64) {
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l := SaturnL(jde)
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b := SaturnB(jde)
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r := SaturnR(jde)
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el := planet.WherePlanet(-1, 0, jde)
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eb := planet.WherePlanet(-1, 1, jde)
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er := planet.WherePlanet(-1, 2, jde)
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x := r*Cos(b)*Cos(l) - er*Cos(eb)*Cos(el)
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y := r*Cos(b)*Sin(l) - er*Cos(eb)*Sin(el)
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z := r*Sin(b) - er*Sin(eb)
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return x, y, z
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}
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func SaturnApparentRa(jd float64) float64 {
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lo, bo := SaturnApparentLoBo(jd)
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eps := TrueObliquity(jd)
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func SaturnApparentRa(jde float64) float64 {
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lo, bo := SaturnApparentLoBo(jde)
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eps := TrueObliquity(jde)
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ra := math.Atan2((Sin(lo)*Cos(eps) - Tan(bo)*Sin(eps)), Cos(lo))
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ra = ra * 180 / math.Pi
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return Limit360(ra)
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}
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func SaturnApparentDec(jd float64) float64 {
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lo, bo := SaturnApparentLoBo(jd)
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eps := TrueObliquity(jd)
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func SaturnApparentDec(jde float64) float64 {
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lo, bo := SaturnApparentLoBo(jde)
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eps := TrueObliquity(jde)
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dec := ArcSin(Sin(bo)*Cos(eps) + Cos(bo)*Sin(eps)*Sin(lo))
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return dec
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}
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func SaturnApparentRaDec(jd float64) (float64, float64) {
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lo, bo := SaturnApparentLoBo(jd)
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eps := TrueObliquity(jd)
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func SaturnApparentRaDec(jde float64) (float64, float64) {
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lo, bo := SaturnApparentLoBo(jde)
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eps := TrueObliquity(jde)
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ra := math.Atan2((Sin(lo)*Cos(eps) - Tan(bo)*Sin(eps)), Cos(lo))
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ra = ra * 180 / math.Pi
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dec := ArcSin(Sin(bo)*Cos(eps) + Cos(bo)*Sin(eps)*Sin(lo))
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@@ -105,16 +105,16 @@ func SaturnApparentLoBo(jd float64) (float64, float64) {
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return geo.lo, geo.bo
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}
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func SaturnMag(jd float64) float64 {
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return SaturnMagN(jd, -1)
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func SaturnMag(jde float64) float64 {
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return SaturnMagN(jde, -1)
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}
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func SaturnHeight(jde, lon, lat, timezone float64) float64 {
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func SaturnHeight(localJD, lon, lat, timezone float64) float64 {
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// 转换为世界时
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utcJde := jde - timezone/24.0
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utcJD := localJD - timezone/24.0
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// 计算视恒星时
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ra, dec := SaturnApparentRaDec(TD2UT(utcJde, true))
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st := Limit360(ApparentSiderealTime(utcJde)*15 + lon)
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ra, dec := SaturnApparentRaDec(UTC2TT(utcJD))
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st := Limit360(ApparentSiderealTime(UTC2UT1(utcJD))*15 + lon)
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// 计算时角
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hourAngle := Limit360(st - ra)
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// 高度角、时角与天球座标三角转换公式
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@@ -123,12 +123,12 @@ func SaturnHeight(jde, lon, lat, timezone float64) float64 {
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return ArcSin(sinHeight)
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}
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func SaturnAzimuth(jde, lon, lat, timezone float64) float64 {
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func SaturnAzimuth(localJD, lon, lat, timezone float64) float64 {
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// 转换为世界时
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utcJde := jde - timezone/24.0
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utcJD := localJD - timezone/24.0
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// 计算视恒星时
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ra, dec := SaturnApparentRaDec(TD2UT(utcJde, true))
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st := Limit360(ApparentSiderealTime(utcJde)*15 + lon)
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ra, dec := SaturnApparentRaDec(UTC2TT(utcJD))
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st := Limit360(ApparentSiderealTime(UTC2UT1(utcJD))*15 + lon)
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// 计算时角
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hourAngle := Limit360(st - ra)
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// 三角转换公式
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@@ -147,21 +147,21 @@ func SaturnAzimuth(jde, lon, lat, timezone float64) float64 {
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}
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func SaturnHourAngle(jd, lon, timezone float64) float64 {
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siderealLongitude := Limit360(ApparentSiderealTime(jd-timezone/24)*15 + lon)
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hourAngle := siderealLongitude - SaturnApparentRa(TD2UT(jd-timezone/24.0, true))
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siderealLongitude := Limit360(ApparentSiderealTime(UTC2UT1(jd-timezone/24))*15 + lon)
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hourAngle := siderealLongitude - SaturnApparentRa(UTC2TT(jd-timezone/24.0))
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if hourAngle < 0 {
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hourAngle += 360
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}
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return hourAngle
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}
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func SaturnCulminationTime(jde, lon, timezone float64) float64 {
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//jde 世界时，非力学时，当地时区 0时，无需转换力学时
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func SaturnCulminationTime(localJD, lon, timezone float64) float64 {
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// localJD 是本地民用日锚点（当地 0 时），不是力学时。
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//ra,dec 瞬时天球座标，非J2000等时间天球坐标
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jde = math.Floor(jde) + 0.5
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estimateJD := jde + Limit360(360-SaturnHourAngle(jde, lon, timezone))/15.0/24.0*0.99726851851851851851
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normalizedHourAngle := func(jde, lon, timezone float64) float64 {
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currentHourAngle := SaturnHourAngle(jde, lon, timezone)
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localJD = math.Floor(localJD) + 0.5
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estimateJD := localJD + Limit360(360-SaturnHourAngle(localJD, lon, timezone))/15.0/24.0*0.99726851851851851851
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normalizedHourAngle := func(localJD, lon, timezone float64) float64 {
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currentHourAngle := SaturnHourAngle(localJD, lon, timezone)
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if currentHourAngle < 180 {
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currentHourAngle += 360
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}
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