b612
044f2f4381
- 新增半解析、旧模型、自定义与多源堆叠星历实例，提供 Context、Instance、SPK 读取及状态与视位置计算 - 统一太阳、月球和行星实例接口，扩展黄经穿越、留、相位、最近角距、偕日可见、任意高度升落、轨道节点及凌日等天象查询 - 完善日月食、月掩与凌日的月缘剖面、有限盘面接触、站心修正、局地可见性、全球路径和地图输出 - 新增 SVG、GeoJSON、KML 天象输出及凌日、月掩和月缘地形相关缓存与几何求解 - 新增恒星星表导入与查询，支持 CSV、Hipparcos、BSC5、Stellarium 等格式及名称、交叉标识、锥面检索和星等过滤 - 补充 IAU 2006、地球定向、折射消光、大气观测、轨道传播及半解析行星/月球数据支持 - 将默认未来民用时标切换为 TimeScaleLeapHour，更新 2027–2400 农历速查表、中文日期解析和时区边界处理 - 增加事件基线、跨模型回归、几何边界、月缘地形和输出契约测试，完善中英文手册、示例资源、NOTICE 与忽略规则
52 lines
2.7 KiB
Go
52 lines
2.7 KiB
Go
package basic
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import (
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. "b612.me/astro/tools"
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)
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// MoonBrightLimbPositionAngle 月亮明亮边缘位置角 / position angle of the Moon's bright limb.
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func MoonBrightLimbPositionAngle(jde float64) float64 {
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return MoonBrightLimbPositionAngleN(jde, -1)
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}
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// MoonBrightLimbPositionAngleNWithInstance 用指定星历实例求值；inst 为 nil 时用进程当前模型 / evaluation with an explicit instance; nil uses the process model.
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func MoonBrightLimbPositionAngleNWithInstance(jde float64, n int, inst *Instance) float64 {
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sunRA, sunDec := HSunApparentRaDecNWithInstance(jde, n, inst)
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moonRA, moonDec := HMoonTrueRaDecNWithInstance(jde, n, inst)
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return brightLimbPositionAngleFromRaDec(sunRA, sunDec, moonRA, moonDec)
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}
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// MoonTopocentricBrightLimbPositionAngle 月亮站心明亮边缘位置角 / topocentric position angle of the Moon's bright limb.
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func MoonTopocentricBrightLimbPositionAngle(jde, observerLon, observerLat, height float64) float64 {
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return MoonTopocentricBrightLimbPositionAngleN(jde, observerLon, observerLat, height, -1)
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}
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// MoonTopocentricBrightLimbPositionAngleNWithInstance 用指定星历实例求值；inst 为 nil 时用进程当前模型 / evaluation with an explicit instance; nil uses the process model.
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func MoonTopocentricBrightLimbPositionAngleNWithInstance(jde, observerLon, observerLat, height float64, n int, inst *Instance) float64 {
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sunRA, sunDec := sunTopocentricApparentRaDecN(jde, observerLon, observerLat, height, n, inst)
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moonRA, moonDec := moonTopocentricApparentRaDecN(jde, observerLon, observerLat, height, n, inst)
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return brightLimbPositionAngleFromRaDec(sunRA, sunDec, moonRA, moonDec)
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}
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func moonTopocentricApparentRaDecN(jde, observerLon, observerLat, height float64, n int, instances ...*Instance) (float64, float64) {
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inst := instanceValue(instances)
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geocentricRA := HMoonTrueRaNWithInstance(jde, n, inst)
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geocentricDec := HMoonTrueDecNWithInstance(jde, n, inst)
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distanceAU := HMoonAwayNWithInstance(jde, n, inst) / moonPhysicalAstronomicalUnitKM
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return TopocentricRaDec(geocentricRA, geocentricDec, observerLat, observerLon, TT2UTC(jde), distanceAU, height)
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}
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func sunTopocentricApparentRaDecN(jde, observerLon, observerLat, height float64, n int, instances ...*Instance) (float64, float64) {
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inst := instanceValue(instances)
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geocentricRA, geocentricDec := HSunApparentRaDecNWithInstance(jde, n, inst)
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return TopocentricRaDec(geocentricRA, geocentricDec, observerLat, observerLon, TT2UTC(jde), EarthAwayNWithInstance(jde, n, inst), height)
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}
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func brightLimbPositionAngleFromRaDec(sunRA, sunDec, bodyRA, bodyDec float64) float64 {
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y := Cos(sunDec) * Sin(sunRA-bodyRA)
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x := Sin(sunDec)*Cos(bodyDec) - Cos(sunDec)*Sin(bodyDec)*Cos(sunRA-bodyRA)
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return ArcTan2(y, x)
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}
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