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
84 lines
3.6 KiB
Go
84 lines
3.6 KiB
Go
package basic
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import (
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"math"
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"testing"
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"b612.me/astro/internal/ephemtest"
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)
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func TestMoonSeriesNumericalPrecision(t *testing.T) {
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ephemtest.PinLegacy(t)
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// The existing binary64 coefficients evaluated at 70 decimal digits.
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// These check arithmetic precision, not the lunar theory's physical error.
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for _, sample := range []struct{ jd, longitude, latitude, distance, velocity float64 }{
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{990647.125, 48.68531043735905108, -3.208940888099671943, 365328.8143785083007, 14.53542662716284001},
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{1730647.9333686847, 346.3227699608293767, -2.151500042672265917, 368450.7410464923284, 14.30553896629878483},
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{2451545.0, 223.3189003731153751, 5.170885995272171723, 402448.7431750887777, 12.02142669184144213},
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{2460770.123456789, 99.20516643712787636, 5.156920731462777075, 378303.2056716878878, 13.57356557811076973},
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{2817000.99999, 256.0031142427467021, 3.438015761341575242, 402219.0739759512533, 11.99285384469081927},
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{3191874.3956256355, 178.1121054545695063, 1.37109140818496243, 379219.9689425243825, 13.41568168416747773},
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{3547272.75, 167.6849402044916958, 5.088592207858965847, 374590.3971822900352, 13.85120063917007945},
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} {
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longitude := HMoonTrueLo(sample.jd)
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latitude := HMoonTrueBo(sample.jd)
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distance := HMoonAway(sample.jd)
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if error := math.Abs(math.Remainder(longitude-sample.longitude, 360)); error > 2e-11 {
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t.Errorf("jd=%.12f longitude error=%g degrees", sample.jd, error)
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}
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if error := math.Abs(latitude - sample.latitude); error > 2e-11 {
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t.Errorf("jd=%.12f latitude error=%g degrees", sample.jd, error)
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}
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if error := math.Abs(distance - sample.distance); error > 1e-5 {
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t.Errorf("jd=%.12f distance error=%g km", sample.jd, error)
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}
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const step = 5.0 / 86400
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before, after := sample.jd-step, sample.jd+step
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velocity := math.Remainder(HMoonTrueLo(after)-HMoonTrueLo(before), 360) / (after - before)
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if error := math.Abs(velocity - sample.velocity); error > 2e-7 {
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t.Errorf("jd=%.12f velocity error=%g degrees/day", sample.jd, error)
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}
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}
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}
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func TestOccultationContactDerivativeNumericalStability(t *testing.T) {
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config, _ := planetOccultationConfigFor(OccultationMercury)
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cache := newPlanetOccultationEventCache(config)
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const tt = 1730647.933368684724
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const longitude = 90.88806942770216
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const latitude = 29.603106445560446
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evaluations := newOccultationRiseSetEvaluationCache(cache.riseSetContextAt)
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derivative := func(jd float64) float64 {
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return evaluations.evaluation(jd).contactDerivative(longitude, latitude)
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}
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center := derivative(tt)
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const trendStep = 0.5 / 86400
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trend := (derivative(tt+trendStep) - derivative(tt-trendStep)) / (2 * trendStep)
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ulp := math.Nextafter(tt, math.Inf(1)) - tt
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for i := -16; i <= 16; i++ {
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offset := float64(i) * ulp
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jitter := derivative(tt+offset) - center - trend*offset
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if math.Abs(jitter) > occultationRiseSetJunctionDerivativeTolerance {
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t.Fatalf("offset=%g seconds: derivative jitter=%g degrees/day", offset*86400, jitter)
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}
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}
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cache.preparePathEphemeris(tt, OccultationPathAlgorithmOptimized)
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if cache.local == nil || !cache.local.dense {
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t.Fatal("smooth exact states must support the checked dense ephemeris")
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}
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}
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// MoonCalcNew 与 HMoonTrueLo 是同一个物理量的两个入口，必须给出同一个值。
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func TestMoonCalcNewMatchesHMoonTrueLo(t *testing.T) {
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for _, jd := range []float64{2451545.0, 2460310.5, 2415020.5, 2299160.5, 2500000.5} {
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direct := math.Mod(MoonCalcNew(0, jd)*180/math.Pi, 360)
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if direct < 0 {
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direct += 360
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}
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high := HMoonTrueLo(jd)
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if diff := math.Abs(direct - high); diff > 1e-12 {
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t.Errorf("jd %.1f: MoonCalcNew=%0.15f HMoonTrueLo=%0.15f diff=%.3g deg", jd, direct, high, diff)
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}
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}
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}
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