feat: 引入可切换星历模型并扩展天象观测链路
- 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
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package phenomena
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import (
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"time"
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"b612.me/astro/basic"
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)
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// AltitudeLimb 日月取高度的位置 / limb used for Sun and Moon altitude.
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type AltitudeLimb = basic.AltitudeLimb
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const (
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LimbUpper = basic.AltitudeLimbUpper
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LimbCenter = basic.AltitudeLimbCenter
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LimbLower = basic.AltitudeLimbLower
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)
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// AltitudeOptions 任意高度升落选项；零值为上缘、标准气象、计入折射 / altitude crossing options.
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type AltitudeOptions = basic.AltitudeCrossingOptions
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// AltitudeState 一个民用日内的穿越状态 / crossing state over one civil day.
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type AltitudeState = basic.AltitudeCrossingState
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const (
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AltitudeCrosses = basic.AltitudeCrosses
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AltitudeAlwaysAbove = basic.AltitudeAlwaysAbove
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AltitudeAlwaysBelow = basic.AltitudeAlwaysBelow
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AltitudeTangent = basic.AltitudeTangent
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)
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// AltitudeCrossingResult date 所在民用日内首次升、落（无则为零值，对应 HasRise/HasSet 为 false）与残差范围（度）/ first rise and set on the civil day.
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type AltitudeCrossingResult = basic.AltitudeCrossingResult
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// AltitudeCrossing 日、月或行星在 date 所在民用日内穿过视高度 altitude（度，相对天文地平）的时刻；height 只影响月球视差 /
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// Sun, Moon or planet crossings of an apparent altitude.
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func (module *Phenomena) AltitudeCrossing(body Body, date time.Time, lon, lat, height, altitude float64, options AltitudeOptions) (AltitudeCrossingResult, error) {
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return basic.SkyAltitudeCrossingOnDate(body, date, lon, lat, height, altitude, options, module.inst)
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}
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// StarAltitudeCrossing 恒星（视赤经、视赤纬，度）穿过视高度 altitude 的时刻 / star crossings of an apparent altitude.
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func StarAltitudeCrossing(date time.Time, ra, dec, lon, lat, altitude float64, options AltitudeOptions) (AltitudeCrossingResult, error) {
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return basic.StarAltitudeCrossingOnDate(date, ra, dec, lon, lat, altitude, options)
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}
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package phenomena
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import "time"
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// LongitudeCrossings 视黄经经过 longitude 的全部时刻 / times when the apparent longitude equals longitude.
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func LongitudeCrossings(body Body, longitude float64, start, end time.Time) []Event {
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return defaultModule.LongitudeCrossings(body, longitude, start, end)
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}
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// Stations 视黄经留 / longitude stations.
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func Stations(body Body, start, end time.Time) []Event {
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return defaultModule.Stations(body, start, end)
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}
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// AspectCrossings a 与 b 视黄经差（a − b）等于 angle 的时刻 / times when lon(a) − lon(b) equals angle.
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func AspectCrossings(a, b Body, angle float64, start, end time.Time) []Event {
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return defaultModule.AspectCrossings(a, b, angle, start, end)
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}
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// ClosestApproaches 两天体最近角距 / closest approaches of two bodies.
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func ClosestApproaches(a, b Body, maxSeparation float64, start, end time.Time) []Event {
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return defaultModule.ClosestApproaches(a, b, maxSeparation, start, end)
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}
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// StarApproaches 天体与恒星最近角距 / closest approaches of a body to a star.
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func StarApproaches(body Body, star StarCoordinate, maxSeparation float64, start, end time.Time) []Event {
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return defaultModule.StarApproaches(body, star, maxSeparation, start, end)
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}
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// PlanetHeliacalEvents 行星偕日事件 / planet heliacal events.
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func PlanetHeliacalEvents(body Body, start, end time.Time, lon, lat float64, options HeliacalOptions) []HeliacalEvent {
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return defaultModule.PlanetHeliacalEvents(body, start, end, lon, lat, options)
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}
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// StarHeliacalEvents 恒星偕日事件 / star heliacal events.
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func StarHeliacalEvents(star StarCoordinate, magnitude float64, start, end time.Time, lon, lat float64, options HeliacalOptions) []HeliacalEvent {
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return defaultModule.StarHeliacalEvents(star, magnitude, start, end, lon, lat, options)
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}
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// Apsides 行星或地球的近日点与远日点 / perihelia and aphelia.
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func Apsides(body Body, start, end time.Time) []OrbitalEvent {
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return defaultModule.Apsides(body, start, end)
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}
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// Nodes 行星的升交点与降交点 / node passages.
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func Nodes(body Body, start, end time.Time) []OrbitalEvent {
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return defaultModule.Nodes(body, start, end)
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}
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// AltitudeCrossing 日、月或行星穿过任意视高度的时刻 / altitude crossings with the default ephemeris.
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func AltitudeCrossing(body Body, date time.Time, lon, lat, height, altitude float64, options AltitudeOptions) (AltitudeCrossingResult, error) {
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return defaultModule.AltitudeCrossing(body, date, lon, lat, height, altitude, options)
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}
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package phenomena
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import (
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"testing"
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"time"
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)
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func TestApsidesIndependentOfHostZone(t *testing.T) {
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start := time.Date(2026, 1, 1, 0, 0, 0, 0, time.UTC)
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end := time.Date(2026, 12, 31, 0, 0, 0, 0, time.UTC)
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saved := time.Local
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defer func() { time.Local = saved }()
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time.Local = time.UTC
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want := Apsides(Earth, start, end)
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newYork, err := time.LoadLocation("America/New_York")
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if err != nil {
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newYork = time.FixedZone("EST", -5*3600)
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}
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time.Local = newYork
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got := Apsides(Earth, start, end)
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if len(got) != len(want) || len(got) == 0 {
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t.Fatalf("len got %d, want %d", len(got), len(want))
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}
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for i := range got {
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if !got[i].Time.Equal(want[i].Time) || got[i].Time.Location() != time.UTC {
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t.Fatalf("event %d: got %v, want %v", i, got[i].Time, want[i].Time)
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}
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}
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}
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@@ -0,0 +1,176 @@
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// Package phenomena 提供任意两天体的黄经穿越、留、相位、最近角距与偕日可见搜索 / generic sky event and heliacal visibility searches.
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package phenomena
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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/internal/ephem"
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)
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// Body 可搜索的天体 / searchable body.
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type Body = basic.SkyBody
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// Earth 地球，只用于 Apsides / Earth, valid only for Apsides.
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const Earth = basic.SkyEarth
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const (
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// Sun 太阳 / the Sun.
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Sun = basic.SkySun
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// Moon 月球 / the Moon.
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Moon = basic.SkyMoon
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// Mercury 水星 / Mercury.
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Mercury = basic.SkyMercury
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// Venus 金星 / Venus.
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Venus = basic.SkyVenus
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// Mars 火星 / Mars.
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Mars = basic.SkyMars
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// Jupiter 木星 / Jupiter.
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Jupiter = basic.SkyJupiter
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// Saturn 土星 / Saturn.
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Saturn = basic.SkySaturn
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// Uranus 天王星 / Uranus.
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Uranus = basic.SkyUranus
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// Neptune 海王星 / Neptune.
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Neptune = basic.SkyNeptune
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)
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// StarCoordinate 恒星星表坐标 / catalog star coordinate.
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type StarCoordinate = basic.StarCoordinate
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// HeliacalOptions 偕日可见参数 / heliacal visibility options.
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type HeliacalOptions = basic.HeliacalOptions
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// HeliacalEventKind 偕日事件类型 / heliacal event kind.
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type HeliacalEventKind = basic.HeliacalEventKind
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const (
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// HeliacalMorningFirst 晨始见（偕日升） / morning first visibility.
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HeliacalMorningFirst = basic.HeliacalMorningFirst
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// HeliacalMorningLast 晨末见 / morning last visibility.
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HeliacalMorningLast = basic.HeliacalMorningLast
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// HeliacalEveningFirst 昏始见 / evening first visibility.
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HeliacalEveningFirst = basic.HeliacalEveningFirst
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// HeliacalEveningLast 昏末见（偕日落） / evening last visibility.
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HeliacalEveningLast = basic.HeliacalEveningLast
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)
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// Event 天象事件；Value 为事件对应的角量（度）/ sky event; Value is the event angle in degrees.
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type Event struct {
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Time time.Time
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Value float64
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}
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// HeliacalEvent 偕日事件，Time 为当次晨昏最佳可见时刻 / heliacal event at the best moment of that twilight.
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type HeliacalEvent struct {
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Kind HeliacalEventKind
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Time time.Time
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Margin float64
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TargetAltitude float64
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SunAltitude float64
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}
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// Phenomena 指定星历实例的计算模块 / computation module bound to an ephemeris instance.
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type Phenomena struct{ inst *ephem.Instance }
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// NewWithInstance 创建指定星历实例的模块，nil 使用全局模型 / create a module; nil uses the global model.
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func NewWithInstance(inst *ephem.Instance) *Phenomena { return &Phenomena{inst: inst} }
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var defaultModule Phenomena
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func toTT(date time.Time) float64 { return basic.UTC2TT(basic.Date2JD(date.UTC())) }
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func events(list []basic.SkyEvent, loc *time.Location) []Event {
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out := make([]Event, 0, len(list))
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for _, e := range list {
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out = append(out, Event{Time: basic.JD2DateByZone(basic.TT2UTC(e.JDE), loc, false), Value: e.Value})
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}
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return out
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}
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// LongitudeCrossings 视黄经经过 longitude 的全部时刻 / times when the apparent longitude equals longitude.
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func (module *Phenomena) LongitudeCrossings(body Body, longitude float64, start, end time.Time) []Event {
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return events(basic.SkyLongitudeCrossingsWithInstance(body, longitude, toTT(start), toTT(end), module.inst), start.Location())
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}
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// Stations 视黄经留，Value 为留时视黄经 / longitude stations; Value is the longitude.
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func (module *Phenomena) Stations(body Body, start, end time.Time) []Event {
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return events(basic.SkyStationsWithInstance(body, toTT(start), toTT(end), module.inst), start.Location())
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}
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// AspectCrossings a 与 b 视黄经差（a − b）等于 angle 的时刻 / times when lon(a) − lon(b) equals angle.
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func (module *Phenomena) AspectCrossings(a, b Body, angle float64, start, end time.Time) []Event {
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return events(basic.SkyAspectCrossingsWithInstance(a, b, angle, toTT(start), toTT(end), module.inst), start.Location())
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}
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// ClosestApproaches 两天体地心视角距的局部极小，Value 为角距（度）/ closest approaches within maxSeparation degrees.
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func (module *Phenomena) ClosestApproaches(a, b Body, maxSeparation float64, start, end time.Time) []Event {
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return events(basic.SkySeparationMinimaWithInstance(a, b, maxSeparation, toTT(start), toTT(end), module.inst), start.Location())
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}
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// StarApproaches 天体与恒星地心视角距的局部极小 / closest approaches of a body to a star.
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func (module *Phenomena) StarApproaches(body Body, star StarCoordinate, maxSeparation float64, start, end time.Time) []Event {
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return events(basic.SkyStarSeparationMinimaWithInstance(body, star, maxSeparation, toTT(start), toTT(end), module.inst), start.Location())
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}
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func heliacal(list []basic.HeliacalEvent, loc *time.Location) []HeliacalEvent {
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out := make([]HeliacalEvent, 0, len(list))
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for _, e := range list {
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out = append(out, HeliacalEvent{e.Kind, basic.JD2DateByZone(e.JD, loc, false), e.Margin, e.TargetAltitude, e.SunAltitude})
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}
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return out
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}
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// PlanetHeliacalEvents 行星晨昏始见、末见（经度东正）/ planet heliacal events; longitude east positive.
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func (module *Phenomena) PlanetHeliacalEvents(body Body, start, end time.Time, lon, lat float64, options HeliacalOptions) []HeliacalEvent {
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return heliacal(basic.FindPlanetHeliacalEventsWithInstance(body, basic.Date2JD(start.UTC()), basic.Date2JD(end.UTC()), lon, lat, options, module.inst), start.Location())
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}
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// StarHeliacalEvents 恒星晨昏始见、末见；magnitude 为 V 星等 / star heliacal events with V magnitude.
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func (module *Phenomena) StarHeliacalEvents(star StarCoordinate, magnitude float64, start, end time.Time, lon, lat float64, options HeliacalOptions) []HeliacalEvent {
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return heliacal(basic.FindStarHeliacalEventsWithInstance(star, magnitude, basic.Date2JD(start.UTC()), basic.Date2JD(end.UTC()), lon, lat, options, module.inst), start.Location())
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}
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// LimitingMagnitude 无月夜肉眼极限星等（Schaefer 模型），消光系数非正时为 NaN / naked-eye limiting magnitude without moonlight.
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func LimitingMagnitude(targetAltitude, sunAltitude, separation, extinction float64) float64 {
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return basic.LimitingMagnitude(targetAltitude, sunAltitude, separation, extinction)
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}
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// OrbitalEventKind 轨道事件类型 / orbital event kind.
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type OrbitalEventKind = basic.OrbitalEventKind
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const (
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// Perihelion 近日点 / perihelion.
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Perihelion = basic.OrbitalPerihelion
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// Aphelion 远日点 / aphelion.
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Aphelion = basic.OrbitalAphelion
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// AscendingNode 升交点 / ascending node.
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AscendingNode = basic.OrbitalAscendingNode
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// DescendingNode 降交点 / descending node.
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DescendingNode = basic.OrbitalDescendingNode
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)
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// OrbitalEvent 轨道事件，DistanceAU 为日心距 / orbital event with heliocentric distance in AU.
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type OrbitalEvent struct {
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Time time.Time
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Kind OrbitalEventKind
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DistanceAU float64
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}
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func orbital(list []basic.OrbitalEvent, loc *time.Location) []OrbitalEvent {
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out := make([]OrbitalEvent, 0, len(list))
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for _, e := range list {
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out = append(out, OrbitalEvent{Time: basic.JD2DateByZone(basic.TT2UTC(e.JDE), loc, false), Kind: e.Kind, DistanceAU: e.DistanceAU})
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}
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return out
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}
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// Apsides 行星或地球在 [start, end] 内的近日点与远日点 / perihelia and aphelia in the window.
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func (module *Phenomena) Apsides(body Body, start, end time.Time) []OrbitalEvent {
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return orbital(basic.PlanetApsidesWithInstance(body, toTT(start), toTT(end), module.inst), start.Location())
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}
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// Nodes 行星在 [start, end] 内穿过历元平黄道的升交点与降交点 / ascending and descending node passages.
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func (module *Phenomena) Nodes(body Body, start, end time.Time) []OrbitalEvent {
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return orbital(basic.PlanetNodesWithInstance(body, toTT(start), toTT(end), module.inst), start.Location())
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}
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@@ -0,0 +1,41 @@
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// 被测契约：公开包装与 basic 一致，并保留输入时区。
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package phenomena
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import (
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"testing"
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"time"
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)
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func TestGreatConjunctionPublic(t *testing.T) {
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loc := time.FixedZone("CST", 8*3600)
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got := ClosestApproaches(Jupiter, Saturn, 1, time.Date(2020, 10, 1, 0, 0, 0, 0, loc), time.Date(2021, 3, 1, 0, 0, 0, 0, loc))
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if len(got) != 1 || got[0].Time.Location() != loc || got[0].Time.Month() != time.December || got[0].Value > 0.11 {
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t.Fatalf("%+v", got)
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}
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}
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func TestVenusHeliacalPublic(t *testing.T) {
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got := PlanetHeliacalEvents(Venus, time.Date(2025, 2, 15, 0, 0, 0, 0, time.UTC), time.Date(2025, 4, 30, 0, 0, 0, 0, time.UTC), 116.4, 39.9, HeliacalOptions{})
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if len(got) < 2 {
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t.Fatalf("%+v", got)
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}
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}
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func TestAltitudeCrossingPublic(t *testing.T) {
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date := time.Date(2025, 3, 20, 0, 0, 0, 0, time.FixedZone("CST", 8*3600))
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got, err := AltitudeCrossing(Sun, date, 116.4, 39.9, 0, -18, AltitudeOptions{Limb: LimbCenter, NoRefraction: true})
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if err != nil || !got.HasRise || !got.HasSet || got.State != AltitudeCrosses {
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t.Fatalf("astronomical twilight: %+v %v", got, err)
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}
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if got.Rise.Hour() != 4 || got.Set.Hour() != 19 {
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t.Errorf("unexpected twilight times %v %v", got.Rise, got.Set)
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}
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star, err := StarAltitudeCrossing(date, 101.287, -16.716, 116.4, 39.9, 0, AltitudeOptions{})
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if err != nil || !star.HasRise {
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t.Fatalf("star: %+v %v", star, err)
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||||
}
|
||||
ev := Apsides(Earth, time.Date(2026, 1, 1, 0, 0, 0, 0, time.UTC), time.Date(2026, 12, 31, 0, 0, 0, 0, time.UTC))
|
||||
if len(ev) != 2 || ev[0].Kind != Perihelion || ev[0].Time.Month() != time.January {
|
||||
t.Errorf("earth apsides 2026: %+v", ev)
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,29 @@
|
||||
package phenomena
|
||||
|
||||
import "b612.me/astro/basic"
|
||||
|
||||
// StarData 内嵌 9100 星表中的一条记录 / one entry from the embedded 9100-star catalog.
|
||||
type StarData = basic.StarData
|
||||
|
||||
// StarCoordinateFromStarData 将星表记录转换为恒星坐标 / converts a catalog entry to a star coordinate.
|
||||
func StarCoordinateFromStarData(star StarData) (StarCoordinate, error) {
|
||||
return basic.StarCoordinateFromStarData(star)
|
||||
}
|
||||
|
||||
// StarCoordinateByHR 按 HR 编号从内嵌星表得到恒星坐标 / returns a star coordinate by HR number.
|
||||
func StarCoordinateByHR(hr int) (StarCoordinate, error) {
|
||||
star, err := basic.StarDataByHR(hr)
|
||||
if err != nil {
|
||||
return StarCoordinate{}, err
|
||||
}
|
||||
return StarCoordinateFromStarData(star)
|
||||
}
|
||||
|
||||
// StarCoordinateByName 按内嵌星表中文名得到恒星坐标 / returns a star coordinate by Chinese catalog name.
|
||||
func StarCoordinateByName(name string) (StarCoordinate, error) {
|
||||
star, err := basic.StarDataByChinese(name)
|
||||
if err != nil {
|
||||
return StarCoordinate{}, err
|
||||
}
|
||||
return StarCoordinateFromStarData(star)
|
||||
}
|
||||
@@ -0,0 +1,45 @@
|
||||
package phenomena
|
||||
|
||||
import (
|
||||
"testing"
|
||||
|
||||
"b612.me/astro/basic"
|
||||
)
|
||||
|
||||
func TestStarCoordinateLookup(t *testing.T) {
|
||||
byHR, err := StarCoordinateByHR(2491)
|
||||
if err != nil {
|
||||
t.Fatalf("StarCoordinateByHR() error = %v", err)
|
||||
}
|
||||
byName, err := StarCoordinateByName("天狼")
|
||||
if err != nil {
|
||||
t.Fatalf("StarCoordinateByName() error = %v", err)
|
||||
}
|
||||
if byHR != byName {
|
||||
t.Fatalf("lookup mismatch: HR=%+v name=%+v", byHR, byName)
|
||||
}
|
||||
|
||||
data, err := basic.StarDataByHR(2491)
|
||||
if err != nil {
|
||||
t.Fatalf("basic star lookup error = %v", err)
|
||||
}
|
||||
converted, err := StarCoordinateFromStarData(data)
|
||||
if err != nil {
|
||||
t.Fatalf("StarCoordinateFromStarData() error = %v", err)
|
||||
}
|
||||
if byHR != converted {
|
||||
t.Fatalf("wrapper mismatch: lookup=%+v converted=%+v", byHR, converted)
|
||||
}
|
||||
}
|
||||
|
||||
func TestStarCoordinateLookupInvalid(t *testing.T) {
|
||||
if _, err := StarCoordinateByHR(0); err == nil {
|
||||
t.Fatal("StarCoordinateByHR(0) expected an error")
|
||||
}
|
||||
if _, err := StarCoordinateByName("不存在的恒星"); err == nil {
|
||||
t.Fatal("StarCoordinateByName() expected an error")
|
||||
}
|
||||
if _, err := StarCoordinateFromStarData(StarData{}); err == nil {
|
||||
t.Fatal("StarCoordinateFromStarData() expected an error")
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user