b612
2bf8478639
- 新增日月食中心带、偏食带、阴影足迹、等时线、食分线及升落边界计算，支持极区与混合食拓扑 - 新增日食单时刻阴影求解器、站心状态查询、批量采样和 ΔT 覆盖接口 - 重构恒星与行星月掩路径，补充有限盘面接触、站心修正、掩带宽度、极区投影及升落边界 - 扩展 SVG 与 GeoJSON 输出，支持详细面板、全球/极区/地球投影、边界闭合、时间标记和拓扑签名 - 扩展日月食候选搜索、局地搜索、沙罗序列预计算与范围外推，补充系列锚点和成员一致性校验 - 补齐古历纪年、儒略历独有闰日、多公历候选、历法改革跨日及精确日期运算接口 - 优化 ΔT、章动、恒星时、月球地平线、事件根搜索和本地星历缓存，降低重复计算开销并提升边界稳定
173 lines
9.2 KiB
Go
173 lines
9.2 KiB
Go
// 低精度日月基线与高精度派生量的 n 截断收敛契约。
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package astro_test
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import (
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"encoding/json"
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"math"
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"os"
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"testing"
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"b612.me/astro/basic"
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"b612.me/astro/planet"
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)
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type lowPrecisionSunSnapshot struct {
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LoBits uint64 `json:"lo_bits"`
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MBits uint64 `json:"m_bits"`
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EccBits uint64 `json:"ecc_bits"`
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PeriBits uint64 `json:"peri_bits"`
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MidBits uint64 `json:"mid_bits"`
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TrueLoBits uint64 `json:"true_lo_bits"`
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ApparentLoBits uint64 `json:"apparent_lo_bits"`
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ApparentRaBits uint64 `json:"apparent_ra_bits"`
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ApparentDecBits uint64 `json:"apparent_dec_bits"`
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TrueRaBits uint64 `json:"true_ra_bits"`
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TrueDecBits uint64 `json:"true_dec_bits"`
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DistanceBits uint64 `json:"distance_bits"`
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}
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type lowPrecisionMoonSnapshot struct {
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LoBits uint64 `json:"lo_bits"`
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SunAngleBits uint64 `json:"sun_angle_bits"`
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MBits uint64 `json:"m_bits"`
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LonXBits uint64 `json:"lonx_bits"`
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IBits uint64 `json:"i_bits"`
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RBits uint64 `json:"r_bits"`
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BBits uint64 `json:"b_bits"`
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TrueLoBits uint64 `json:"true_lo_bits"`
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TrueBoBits uint64 `json:"true_bo_bits"`
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AwayBits uint64 `json:"away_bits"`
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ApparentLoBits uint64 `json:"apparent_lo_bits"`
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TrueRaBits uint64 `json:"true_ra_bits"`
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TrueDecBits uint64 `json:"true_dec_bits"`
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}
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type lowPrecisionSample struct {
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UTC string `json:"utc"`
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TTJD float64 `json:"tt_jd"`
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Sun lowPrecisionSunSnapshot `json:"sun"`
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Moon lowPrecisionMoonSnapshot `json:"moon"`
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}
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func loadLowPrecisionSamples(t *testing.T) []lowPrecisionSample {
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t.Helper()
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data, err := os.ReadFile("testdata/low_precision_sun_moon_baseline.json")
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if err != nil {
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t.Fatal(err)
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}
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var samples []lowPrecisionSample
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if err := json.Unmarshal(data, &samples); err != nil {
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t.Fatal(err)
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}
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if len(samples) == 0 {
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t.Fatal("empty low precision baseline samples")
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}
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return samples
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}
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func TestLowPrecisionSunMoonBaselineRegression(t *testing.T) {
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samples := loadLowPrecisionSamples(t)
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assertBits := func(t *testing.T, name, utc string, got float64, want uint64) {
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t.Helper()
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if math.Float64bits(got) != want {
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t.Fatalf("%s regression at %s", name, utc)
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}
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}
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for _, sample := range samples {
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jd := sample.TTJD
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assertBits(t, "planet.SunLo", sample.UTC, planet.SunLo(jd), sample.Sun.LoBits)
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assertBits(t, "basic.SunLo", sample.UTC, basic.SunLo(jd), sample.Sun.LoBits)
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assertBits(t, "planet.SunM", sample.UTC, planet.SunM(jd), sample.Sun.MBits)
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assertBits(t, "basic.SunM", sample.UTC, basic.SunM(jd), sample.Sun.MBits)
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assertBits(t, "planet.Earthe", sample.UTC, planet.Earthe(jd), sample.Sun.EccBits)
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assertBits(t, "basic.Earthe", sample.UTC, basic.Earthe(jd), sample.Sun.EccBits)
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assertBits(t, "planet.EarthPI", sample.UTC, planet.EarthPI(jd), sample.Sun.PeriBits)
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assertBits(t, "basic.EarthPI", sample.UTC, basic.EarthPI(jd), sample.Sun.PeriBits)
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assertBits(t, "planet.SunMidFun", sample.UTC, planet.SunMidFun(jd), sample.Sun.MidBits)
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assertBits(t, "basic.SunMidFun", sample.UTC, basic.SunMidFun(jd), sample.Sun.MidBits)
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assertBits(t, "planet.SunTrueLo", sample.UTC, planet.SunTrueLo(jd), sample.Sun.TrueLoBits)
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assertBits(t, "basic.SunTrueLo", sample.UTC, basic.SunTrueLo(jd), sample.Sun.TrueLoBits)
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assertBits(t, "planet.SunApparentLo", sample.UTC, planet.SunApparentLo(jd), sample.Sun.ApparentLoBits)
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assertBits(t, "basic.SunApparentLo", sample.UTC, basic.SunApparentLo(jd), sample.Sun.ApparentLoBits)
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assertBits(t, "basic.SunApparentRa", sample.UTC, basic.SunApparentRa(jd), sample.Sun.ApparentRaBits)
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assertBits(t, "basic.SunApparentDec", sample.UTC, basic.SunApparentDec(jd), sample.Sun.ApparentDecBits)
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assertBits(t, "basic.SunTrueRa", sample.UTC, basic.SunTrueRa(jd), sample.Sun.TrueRaBits)
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assertBits(t, "basic.SunTrueDec", sample.UTC, basic.SunTrueDec(jd), sample.Sun.TrueDecBits)
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assertBits(t, "planet.Distance", sample.UTC, planet.Distance(jd), sample.Sun.DistanceBits)
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assertBits(t, "basic.Distance", sample.UTC, basic.Distance(jd), sample.Sun.DistanceBits)
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assertBits(t, "planet.MoonLo", sample.UTC, planet.MoonLo(jd), sample.Moon.LoBits)
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assertBits(t, "basic.MoonLo", sample.UTC, basic.MoonLo(jd), sample.Moon.LoBits)
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assertBits(t, "planet.SunMoonAngle", sample.UTC, planet.SunMoonAngle(jd), sample.Moon.SunAngleBits)
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assertBits(t, "basic.SunMoonAngle", sample.UTC, basic.SunMoonAngle(jd), sample.Moon.SunAngleBits)
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assertBits(t, "planet.MoonM", sample.UTC, planet.MoonM(jd), sample.Moon.MBits)
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assertBits(t, "basic.MoonM", sample.UTC, basic.MoonM(jd), sample.Moon.MBits)
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assertBits(t, "planet.MoonLonX", sample.UTC, planet.MoonLonX(jd), sample.Moon.LonXBits)
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assertBits(t, "basic.MoonLonX", sample.UTC, basic.MoonLonX(jd), sample.Moon.LonXBits)
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assertBits(t, "planet.MoonI", sample.UTC, planet.MoonI(jd), sample.Moon.IBits)
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assertBits(t, "basic.MoonI", sample.UTC, basic.MoonI(jd), sample.Moon.IBits)
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assertBits(t, "planet.MoonR", sample.UTC, planet.MoonR(jd), sample.Moon.RBits)
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assertBits(t, "basic.MoonR", sample.UTC, basic.MoonR(jd), sample.Moon.RBits)
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assertBits(t, "planet.MoonB", sample.UTC, planet.MoonB(jd), sample.Moon.BBits)
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assertBits(t, "basic.MoonB", sample.UTC, basic.MoonB(jd), sample.Moon.BBits)
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assertBits(t, "planet.MoonTrueLo", sample.UTC, planet.MoonTrueLo(jd), sample.Moon.TrueLoBits)
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assertBits(t, "basic.MoonTrueLo", sample.UTC, basic.MoonTrueLo(jd), sample.Moon.TrueLoBits)
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assertBits(t, "planet.MoonTrueBo", sample.UTC, planet.MoonTrueBo(jd), sample.Moon.TrueBoBits)
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assertBits(t, "basic.MoonTrueBo", sample.UTC, basic.MoonTrueBo(jd), sample.Moon.TrueBoBits)
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assertBits(t, "planet.MoonAway", sample.UTC, planet.MoonAway(jd), sample.Moon.AwayBits)
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assertBits(t, "basic.MoonAway", sample.UTC, basic.MoonAway(jd), sample.Moon.AwayBits)
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assertBits(t, "basic.MoonApparentLo", sample.UTC, basic.MoonApparentLo(jd), sample.Moon.ApparentLoBits)
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assertBits(t, "basic.MoonTrueRa", sample.UTC, basic.MoonTrueRa(jd), sample.Moon.TrueRaBits)
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assertBits(t, "basic.MoonTrueDec", sample.UTC, basic.MoonTrueDec(jd), sample.Moon.TrueDecBits)
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}
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}
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func derivedTruncationCases(samples []lowPrecisionSample) []truncationCase {
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jdOf := func(index int) float64 { return samples[index].TTJD }
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lon := 116.391
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lat := 39.907
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tz := 8.0
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// withSite 把带观测点经纬度与时区的入口适配成 jd 探针。
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withSite := func(f func(jd, lon, lat, tz float64, n int) float64) func(float64, int) float64 {
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return func(jd float64, n int) float64 { return f(jd, lon, lat, tz, n) }
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}
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withSiteRaDec := func(f func(jd, lon, lat, tz float64, n int) (float64, float64)) func(float64, int) (float64, float64) {
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return func(jd float64, n int) (float64, float64) { return f(jd, lon, lat, tz, n) }
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}
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// 上限按 48 个采样点实测最坏值放宽 5 倍以上给出，随 n 递减。
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return []truncationCase{
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scalarTruncation("HSunTrueLoN", jdOf, basic.HSunTrueLoN, true, []float64{0.15, 0.05, 0.02, 0.006}),
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scalarTruncation("HSunTrueBoN", jdOf, basic.HSunTrueBoN, true, []float64{1e-3, 5e-4, 3e-4, 1.5e-4}),
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scalarTruncation("HSunApparentLoN", jdOf, basic.HSunApparentLoN, true, []float64{0.15, 0.05, 0.02, 0.006}),
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scalarTruncation("SunLoGXCN", jdOf, basic.SunLoGXCN, true, []float64{1e-5, 2e-6, 1e-6, 3e-7}),
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scalarTruncation("EarthAwayN", jdOf, basic.EarthAwayN, false, []float64{1e-3, 3e-4, 1e-4, 3e-5}),
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scalarTruncation("HSunApparentRaN", jdOf, basic.HSunApparentRaN, true, []float64{0.15, 0.05, 0.02, 0.006}),
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scalarTruncation("HSunTrueRaN", jdOf, basic.HSunTrueRaN, true, []float64{0.15, 0.05, 0.02, 0.006}),
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scalarTruncation("HSunApparentDecN", jdOf, basic.HSunApparentDecN, true, []float64{0.05, 0.02, 0.008, 0.003}),
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scalarTruncation("HSunTrueDecN", jdOf, basic.HSunTrueDecN, true, []float64{0.05, 0.02, 0.008, 0.003}),
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pairTruncation("HSunApparentRaDecN", jdOf, basic.HSunApparentRaDecN, []float64{0.15, 0.05, 0.02, 0.006}),
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scalarTruncation("HMoonTrueLoN", jdOf, basic.HMoonTrueLoN, true, []float64{5, 2.5, 1, 0.25}),
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scalarTruncation("HMoonTrueBoN", jdOf, basic.HMoonTrueBoN, true, []float64{3, 0.75, 0.15, 0.06}),
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scalarTruncation("HMoonAwayN", jdOf, basic.HMoonAwayN, false, []float64{40000, 7000, 2500, 400}),
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scalarTruncation("HMoonApparentLoN", jdOf, basic.HMoonApparentLoN, true, []float64{5, 2.5, 1, 0.25}),
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scalarTruncation("HMoonTrueRaN", jdOf, basic.HMoonTrueRaN, true, []float64{5, 2.5, 1, 0.3}),
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scalarTruncation("HMoonTrueDecN", jdOf, basic.HMoonTrueDecN, true, []float64{3, 1, 0.4, 0.1}),
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pairTruncation("HMoonTrueRaDecN", jdOf, basic.HMoonTrueRaDecN, []float64{5, 2.5, 1, 0.3}),
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scalarTruncation("HMoonApparentRaN", jdOf, withSite(basic.HMoonApparentRaN), true, []float64{5, 2.5, 1, 0.3}),
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scalarTruncation("HMoonApparentDecN", jdOf, withSite(basic.HMoonApparentDecN), true, []float64{4, 1, 0.3, 0.1}),
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pairTruncation("HMoonApparentRaDecN", jdOf, withSiteRaDec(basic.HMoonApparentRaDecN), []float64{5, 2.5, 1, 0.3}),
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scalarTruncation("HMoonAzimuthN", jdOf, withSite(basic.HMoonAzimuthN), true, []float64{9, 4, 2, 0.9}),
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scalarTruncation("HMoonHeightN", jdOf, withSite(basic.HMoonHeightN), true, []float64{4, 2, 0.7, 0.15}),
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}
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}
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func TestDerivedHighPrecisionTruncationConverges(t *testing.T) {
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samples := loadLowPrecisionSamples(t)
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assertTruncationConverges(t, derivedTruncationCases(samples), len(samples))
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}
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