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
This commit is contained in:
+125
-36
@@ -4,6 +4,8 @@ import (
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"math"
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"sort"
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"time"
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"b612.me/astro/internal/geodata"
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)
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//哦~我是一颗小地球~~
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@@ -19,7 +21,7 @@ const (
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solarEclipsePathDurationHorizonToleranceDegrees = 0.1
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// 地球表面上的影锥足迹不可能比地球本身更宽。
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// No shadow footprint on the Earth can be wider than the Earth itself.
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solarEclipsePathMaxPossibleWidthKM = 2 * 6371.0088
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solarEclipsePathMaxPossibleWidthKM = 2 * geodata.EarthMeanRadiusKM
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solarEclipsePathDuplicateTimeDays = 1e-10
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// A short segment can still hide a large directional change at high
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// latitude. Use a small relative sagitta tolerance so refinement follows
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@@ -120,6 +122,8 @@ type SolarEclipsePathOptions struct {
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// most expensive stage of the pipeline and would otherwise be computed twice
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// by callers that ask for both products.
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SkipCentralBand bool
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// LunarLimb 月缘剖面，nil 为圆月面；修正南北界、带宽、中心带足迹、最长中心食时长与全球始末，中心线不变 / lunar limb profile for limits, widths, band, longest duration and P1/P4.
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LunarLimb LunarLimb
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}
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// SolarEclipsePathPoint 表示日食路径上的一个地理点。
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@@ -173,6 +177,8 @@ type SolarEclipsePathResult struct {
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// the sampled instantaneous footprints because no analytic envelope
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// described this event.
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CentralBandSampled bool
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// CentralLimitsLimbApplied 南北界至少一点按月缘剖面平移，带宽随之修正 / the central limits were moved by the lunar limb.
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CentralLimitsLimbApplied bool
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// StepDays 是实际采用的基础时间采样步长，单位为日。
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// StepDays is the effective base time step in days.
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StepDays float64
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@@ -224,6 +230,9 @@ type SolarEclipsePartialFootprintOptions struct {
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// SunRadiusModel 太阳半径口径，零值为标准档。
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// SunRadiusModel is the solar radius convention; the zero value is the standard one.
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SunRadiusModel SolarEclipseSunRadiusModel
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// LunarLimb 月缘剖面，nil 为圆月面；修正偏食可见域外边界（零食分包络与初亏/复圆升落曲线），
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// 内嵌全球结果与 P1/P4 也与全球日食接口同源地修正；食分线与等时线仍按圆月面 / lunar limb profile for the outer partial boundary, embedded global result and P1/P4.
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LunarLimb LunarLimb
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}
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// SolarEclipsePartialAreaOptions 是 SolarEclipsePartialFootprintOptions 的兼容别名。
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@@ -295,6 +304,8 @@ type SolarEclipsePartialFootprintsResult struct {
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// topology audit (the 16-segment per-curve and 32-segment total caps, shared
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// endpoints and monotonic times), so RiseSetCurves is a truncated result.
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RiseSetTopologyDegraded bool
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// PartialBoundaryLimbApplied 表示偏食可见域外边界至少有一点按月缘剖面平移 / the outer partial boundary was moved by the lunar limb.
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PartialBoundaryLimbApplied bool
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// P1-P4 是半影与地球的外切/内切接触点；不存在的内切点保持零值。
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// P1-P4 are external/internal penumbral contacts; absent internal contacts remain zero.
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P1 SolarEclipsePathPoint
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@@ -371,16 +382,14 @@ func SolarEclipseCentralPath(seedJDE float64, options SolarEclipsePathOptions) S
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return SolarEclipseCentralPathNASABulletinSplitK(seedJDE, options)
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}
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// SolarEclipseCentralPathIAUSingleK 计算日食中心路径，使用 IAU Single-K 模型。
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// SolarEclipseCentralPathIAUSingleK computes the central path with the IAU Single-K model.
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func SolarEclipseCentralPathIAUSingleK(seedJDE float64, options SolarEclipsePathOptions) SolarEclipsePathResult {
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return solarEclipseCentralPath(seedJDE, SolarEclipseModelIAUSingleK, options)
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// SolarEclipseCentralPathIAUSingleKWithInstance 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 SolarEclipseCentralPathIAUSingleKWithInstance(seedJDE float64, options SolarEclipsePathOptions, inst *Instance) SolarEclipsePathResult {
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return solarEclipseCentralPath(seedJDE, SolarEclipseModelIAUSingleK, options, inst)
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}
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// SolarEclipseCentralPathNASABulletinSplitK 计算日食中心路径，使用 NASA bulletin Split-K 模型。
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// SolarEclipseCentralPathNASABulletinSplitK computes the central path with the NASA bulletin Split-K model.
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func SolarEclipseCentralPathNASABulletinSplitK(seedJDE float64, options SolarEclipsePathOptions) SolarEclipsePathResult {
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return solarEclipseCentralPath(seedJDE, SolarEclipseModelNASABulletinSplitK, options)
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// SolarEclipseCentralPathNASABulletinSplitKWithInstance 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 SolarEclipseCentralPathNASABulletinSplitKWithInstance(seedJDE float64, options SolarEclipsePathOptions, inst *Instance) SolarEclipsePathResult {
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return solarEclipseCentralPath(seedJDE, SolarEclipseModelNASABulletinSplitK, options, inst)
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}
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// SolarEclipsePartialFootprints 计算给定近朔时刻附近的日食偏食半影足迹序列，默认使用 NASA bulletin Split-K 模型。
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@@ -389,16 +398,14 @@ func SolarEclipsePartialFootprints(seedJDE float64, options SolarEclipsePartialF
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return SolarEclipsePartialFootprintsNASABulletinSplitK(seedJDE, options)
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}
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// SolarEclipsePartialFootprintsIAUSingleK 计算日食偏食半影足迹序列，使用 IAU Single-K 模型。
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// SolarEclipsePartialFootprintsIAUSingleK computes penumbral footprint samples with the IAU Single-K model.
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func SolarEclipsePartialFootprintsIAUSingleK(seedJDE float64, options SolarEclipsePartialFootprintOptions) SolarEclipsePartialFootprintsResult {
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return solarEclipsePartialFootprints(seedJDE, SolarEclipseModelIAUSingleK, options)
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// SolarEclipsePartialFootprintsIAUSingleKWithInstance 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 SolarEclipsePartialFootprintsIAUSingleKWithInstance(seedJDE float64, options SolarEclipsePartialFootprintOptions, inst *Instance) SolarEclipsePartialFootprintsResult {
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return solarEclipsePartialFootprints(seedJDE, SolarEclipseModelIAUSingleK, options, inst)
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}
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// SolarEclipsePartialFootprintsNASABulletinSplitK 计算日食偏食半影足迹序列，使用 NASA bulletin Split-K 模型。
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// SolarEclipsePartialFootprintsNASABulletinSplitK computes penumbral footprint samples with the NASA bulletin Split-K model.
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func SolarEclipsePartialFootprintsNASABulletinSplitK(seedJDE float64, options SolarEclipsePartialFootprintOptions) SolarEclipsePartialFootprintsResult {
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return solarEclipsePartialFootprints(seedJDE, SolarEclipseModelNASABulletinSplitK, options)
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// SolarEclipsePartialFootprintsNASABulletinSplitKWithInstance 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 SolarEclipsePartialFootprintsNASABulletinSplitKWithInstance(seedJDE float64, options SolarEclipsePartialFootprintOptions, inst *Instance) SolarEclipsePartialFootprintsResult {
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return solarEclipsePartialFootprints(seedJDE, SolarEclipseModelNASABulletinSplitK, options, inst)
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}
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// SolarEclipsePartialArea 计算日食偏食半影足迹序列，是 SolarEclipsePartialFootprints 的兼容包装。
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@@ -419,13 +426,15 @@ func SolarEclipsePartialAreaNASABulletinSplitK(seedJDE float64, options SolarEcl
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return SolarEclipsePartialFootprintsNASABulletinSplitK(seedJDE, options)
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}
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func solarEclipseCentralPath(seedJDE float64, model SolarEclipseRadiusModel, options SolarEclipsePathOptions) SolarEclipsePathResult {
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func solarEclipseCentralPath(seedJDE float64, model SolarEclipseRadiusModel, options SolarEclipsePathOptions, instances ...*Instance) SolarEclipsePathResult {
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inst := instanceValue(instances)
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options = normalizeSolarEclipsePathOptions(options)
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newMoonJDE := CalcMoonSHByJDE(seedJDE, 0)
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newMoonJDE := solarEclipseAnchorNewMoon(seedJDE, inst)
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solver := newSolarEclipseSolverWithOptions(newMoonJDE, SolarEclipseOptions{
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RadiusModel: model,
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SunRadiusModel: options.SunRadiusModel,
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}).withDeltaTSeconds(options.DeltaTSeconds)
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}, inst).withDeltaTSeconds(options.DeltaTSeconds)
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result := solver.eclipseResult()
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path := SolarEclipsePathResult{
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Eclipse: result,
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@@ -447,7 +456,7 @@ func solarEclipseCentralPath(seedJDE float64, model SolarEclipseRadiusModel, opt
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result.GreatestEclipse,
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result.GreatestLongitude,
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result.GreatestLatitude,
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solver.besselAxisAt(result.GreatestEclipse).gst,
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solver.besselAxisAt(result.GreatestEclipse).gst, inst,
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) / rad,
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}
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}
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@@ -486,14 +495,33 @@ func solarEclipseCentralPath(seedJDE float64, model SolarEclipseRadiusModel, opt
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solver.setCenterLinePairWidths(
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centerLine, result.Centrality, northernLimit, southernLimit, pairedLimits,
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)
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limb := options.LunarLimb
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if limb != nil {
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path.Eclipse = solver.withLunarLimb(path.Eclipse, limb)
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greatestIndex, circularWidth := solarEclipseNearestCenterWidth(centerLine, result.GreatestEclipse)
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northernLimb, northWidthApplied := solver.limbCorrectCentralLimits(northernLimit, limb)
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southernLimb, southWidthApplied := solver.limbCorrectCentralLimits(southernLimit, limb)
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path.CentralLimitsLimbApplied = northWidthApplied || southWidthApplied
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solver.setCenterLinePairWidths(centerLine, result.Centrality, northernLimb, southernLimb, pairedLimits)
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// 目录带宽沿用解析口径，只叠加食甚附近成对横截面上的月缘增量。
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if greatestIndex >= 0 && circularWidth > 0 && centerLine[greatestIndex].WidthKM > 0 {
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delta := centerLine[greatestIndex].WidthKM - circularWidth
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path.Eclipse.PathWidthKM += delta
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path.Greatest.WidthKM += delta
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}
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}
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if result.Centrality == SolarEclipseCentralTwoLimits {
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// A one-limit event has no paired cross-section at all, so every sample
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// keeps the 0 that the catalogues also print for it.
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setSolarEclipseCentralContactWidths(centerLine, path.NorthernLimit, path.SouthernLimit)
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}
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path.CenterLine = centerLine
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durationSolver := solver
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if limb != nil {
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durationSolver = solver.withLimbParams(limb)
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}
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path.MaxCentralDurationDays, path.MaxCentralDurationLongitude, path.MaxCentralDurationLatitude =
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solver.centralPathMaxCentralDuration(centerLine)
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durationSolver.centralPathMaxCentralDuration(centerLine)
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// A two-limit central eclipse starts and ends at the external umbral
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// contacts, where the northern and southern limits meet. The center line
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// begins later because its Earth-axis intersection is undefined before the
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@@ -523,6 +551,10 @@ func solarEclipseCentralPath(seedJDE float64, model SolarEclipseRadiusModel, opt
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result.CentralEndOnEarth,
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solarEclipseCentralLimitTargetSpacingKM,
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)
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var northApplied, southApplied bool
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path.NorthernLimit, northApplied = solver.limbCorrectCentralLimits(path.NorthernLimit, limb)
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path.SouthernLimit, southApplied = solver.limbCorrectCentralLimits(path.SouthernLimit, limb)
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path.CentralLimitsLimbApplied = path.CentralLimitsLimbApplied || northApplied || southApplied
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path.PathWidthDefined = result.Centrality == SolarEclipseCentralTwoLimits &&
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len(path.NorthernLimit) > 0 && len(path.SouthernLimit) > 0
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if !path.PathWidthDefined {
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@@ -542,10 +574,29 @@ func solarEclipseCentralPath(seedJDE float64, model SolarEclipseRadiusModel, opt
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StepDays: options.StepDays, BoundaryPoints: 96, DisableRiseSetCurves: true,
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}))
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path.CentralBandSegments = band.CentralBandSegments
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if limb != nil {
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for index, segment := range path.CentralBandSegments {
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path.CentralBandSegments[index], _ = solver.limbCorrectCentralLimits(segment, limb)
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}
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}
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path.CentralBandSampled = band.CentralBandSampled
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return path
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}
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// solarEclipseNearestCenterWidth 返回最接近 jde 的中心线样本序号与其带宽，没有样本时序号为 −1。
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func solarEclipseNearestCenterWidth(centerLine []SolarEclipsePathPoint, jde float64) (int, float64) {
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best, bestDelta := -1, math.Inf(1)
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for index, point := range centerLine {
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if delta := math.Abs(point.JDE - jde); delta < bestDelta {
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best, bestDelta = index, delta
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}
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}
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if best < 0 {
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return -1, 0
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}
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return best, centerLine[best].WidthKM
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}
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func (solver solarEclipseSolver) attachCentralMagnitudeOneTransitions(
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points []SolarEclipsePathPoint,
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) []SolarEclipsePathPoint {
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@@ -581,13 +632,14 @@ func normalizeSolarEclipsePathOptions(options SolarEclipsePathOptions) SolarEcli
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func solarEclipsePartialFootprints(
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seedJDE float64,
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model SolarEclipseRadiusModel,
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options SolarEclipsePartialFootprintOptions,
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) SolarEclipsePartialFootprintsResult {
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options SolarEclipsePartialFootprintOptions, instances ...*Instance) SolarEclipsePartialFootprintsResult {
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inst := instanceValue(instances)
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return solarEclipsePartialFootprintsWithResult(
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seedJDE, model, options, solarEclipseWithDeltaT(seedJDE, SolarEclipseOptions{
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RadiusModel: model,
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SunRadiusModel: options.SunRadiusModel,
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}, options.DeltaTSeconds),
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}, options.DeltaTSeconds, inst), inst,
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)
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}
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@@ -595,8 +647,9 @@ func solarEclipsePartialFootprintsWithResult(
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seedJDE float64,
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model SolarEclipseRadiusModel,
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options SolarEclipsePartialFootprintOptions,
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result SolarEclipseResult,
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) SolarEclipsePartialFootprintsResult {
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result SolarEclipseResult, instances ...*Instance) SolarEclipsePartialFootprintsResult {
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inst := instanceValue(instances)
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options = normalizeSolarEclipsePartialFootprintOptions(options)
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footprintsResult := SolarEclipsePartialFootprintsResult{
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Eclipse: result,
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@@ -608,20 +661,28 @@ func solarEclipsePartialFootprintsWithResult(
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return footprintsResult
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}
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newMoonJDE := CalcMoonSHByJDE(seedJDE, 0)
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newMoonJDE := solarEclipseAnchorNewMoon(seedJDE, inst)
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solver := newSolarEclipseSolverWithOptions(newMoonJDE, SolarEclipseOptions{
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RadiusModel: model,
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SunRadiusModel: options.SunRadiusModel,
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}).withDeltaTSeconds(options.DeltaTSeconds)
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}, inst).withDeltaTSeconds(options.DeltaTSeconds)
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footprintsResult, totalMagnitudeOneSegments := solver.centralBandWithResult(result, options)
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// 有月缘时先求全球月缘结果：偏食足迹与食甚等时线必须落在最终报告的 P1–P4 之内。
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global, window := result, result
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if options.LunarLimb != nil {
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global = solver.withLunarLimb(result, options.LunarLimb)
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if global.PartialBeginOnEarth < result.GreatestEclipse && result.GreatestEclipse < global.PartialEndOnEarth {
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window = global
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}
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}
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// Partial and central-shadow sweeps used to enforce the point budget
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// independently. A high-resolution request could therefore allocate
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// nearly two budgets for each sweep before the caller saw the result.
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// Reserve the already-built central-band samples and share the remaining
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// budget between the main time series before either sweep is generated.
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partialTimes, _ := solarEclipseMovingDiskEngine().sampleTimes(
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result.PartialBeginOnEarth,
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result.PartialEndOnEarth,
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window.PartialBeginOnEarth,
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window.PartialEndOnEarth,
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result.GreatestEclipse,
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options.StepDays,
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)
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@@ -654,9 +715,12 @@ func solarEclipsePartialFootprintsWithResult(
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false,
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)
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}
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if options.LunarLimb != nil && !options.DisableRiseSetCurves {
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footprintsResult.PartialBoundaryLimbApplied = solver.limbCorrectPartialBoundary(&footprintsResult, options.LunarLimb)
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}
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footprints, stepDays, effectiveBoundaryPoints := solver.partialFootprints(
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result.PartialBeginOnEarth,
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result.PartialEndOnEarth,
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window.PartialBeginOnEarth,
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window.PartialEndOnEarth,
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result.GreatestEclipse,
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options,
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)
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@@ -694,7 +758,7 @@ func solarEclipsePartialFootprintsWithResult(
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greatestTimeOptions := options
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if len(greatestTimeOptions.GreatestTimeValues) == 0 && greatestTimeOptions.GreatestTimeStep > 0 {
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levels := greatestTimeContourAlignedLevels(
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result.PartialBeginOnEarth, result.PartialEndOnEarth,
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window.PartialBeginOnEarth, window.PartialEndOnEarth,
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greatestTimeOptions.GreatestTimeStep, greatestTimeContourMaxLevels,
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)
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greatestTimeOptions.GreatestTimeValues = make([]float64, 0, len(levels))
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@@ -703,13 +767,36 @@ func solarEclipsePartialFootprintsWithResult(
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}
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}
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footprintsResult.GreatestTimeContours = solver.greatestTimeContours(
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result.PartialBeginOnEarth,
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result.PartialEndOnEarth,
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window.PartialBeginOnEarth,
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window.PartialEndOnEarth,
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greatestTimeOptions,
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)
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if options.LunarLimb != nil {
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applyFootprintsGlobalLimb(&footprintsResult, global)
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}
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return footprintsResult
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}
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// applyFootprintsGlobalLimb 让足迹里的全球结果与 P1/P4 和全球日食接口同源：换上月缘修正后的偏食始末、
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// 食甚点中心食时长与接触点位置；偏食足迹与食甚等时线须已按同一时间窗采样。
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func applyFootprintsGlobalLimb(footprintsResult *SolarEclipsePartialFootprintsResult, global SolarEclipseResult) {
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footprintsResult.Eclipse = global
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if !global.LunarLimbApplied {
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return
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}
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// 时刻与位置必须同源：月缘解给出接触点时一并替换，否则保留整套圆月面接触点。
|
||||
if footprintsResult.P1.JDE != 0 && global.PartialBeginContact.Defined {
|
||||
footprintsResult.P1.JDE = global.PartialBeginOnEarth
|
||||
footprintsResult.P1.Longitude = global.PartialBeginContact.Longitude
|
||||
footprintsResult.P1.Latitude = global.PartialBeginContact.Latitude
|
||||
}
|
||||
if footprintsResult.P4.JDE != 0 && global.PartialEndContact.Defined {
|
||||
footprintsResult.P4.JDE = global.PartialEndOnEarth
|
||||
footprintsResult.P4.Longitude = global.PartialEndContact.Longitude
|
||||
footprintsResult.P4.Latitude = global.PartialEndContact.Latitude
|
||||
}
|
||||
}
|
||||
|
||||
func (solver solarEclipseSolver) centralBandWithResult(
|
||||
result SolarEclipseResult,
|
||||
options SolarEclipsePartialFootprintOptions,
|
||||
@@ -1337,6 +1424,8 @@ func (solver solarEclipseSolver) centralPathMaxCentralDuration(
|
||||
centerLine []SolarEclipsePathPoint,
|
||||
) (float64, float64, float64) {
|
||||
bestDays, bestLongitude, bestLatitude := 0.0, 0.0, 0.0
|
||||
// 局部星历只建一次；逐点各建一次会让整段扫描的星历开销翻上百倍。
|
||||
solver = solver.withLocalEphemeris()
|
||||
for _, point := range centerLine {
|
||||
if point.SunAltitude < -solarEclipsePathDurationHorizonToleranceDegrees {
|
||||
continue
|
||||
|
||||
Reference in New Issue
Block a user