b612/astro
1
1
Fork 0
Code Issues Pull Requests Projects Releases 20 Wiki Activity

feat: 完善时标与天象几何计算并扩展输出接口

Browse Source 
- 新增时标、ΔT 模型、质心时间与 UT1 支持
- 改进日月食、月掩、行星事件及路径边界计算
- 完善恒星三维自行与动态距离传播
- 扩展 SVG、GeoJSON、KML 输出与底层距离换算工具
- 整理中英文手册、示例资源及回归测试
This commit is contained in:
兔子
2026-09-23 18:55:12 +08:00
parent 1f31a9b5b5
commit 16c62a97d5
503 changed files with 33290 additions and 9471 deletions
Download Patch File Download Diff File Expand all files Collapse all files
basic/delta_t_test.go
+24 -18
View File
@@ -8,8 +8,8 @@ import (
func TestDefaultDeltaTFractionalYear(t *testing.T) {
for _, year := range []float64{-700.5, -0.5, 0, 1000.5, 1582.75, 1800.5, 2000.5, 2026.5} {
whole := math.Floor(year)
start := JDECalc(int(whole), 1, 1)
end := JDECalc(int(whole)+1, 1, 1)
start := JDCalc(int(whole), 1, 1)
end := JDCalc(int(whole)+1, 1, 1)
want := DefaultDeltaTv2(start+(year-whole)*(end-start), true)
got := DefaultDeltaTv2(year, false)
if math.IsNaN(got) || math.Abs(got-want) > 1e-10 {
@@ -28,36 +28,42 @@ func TestDefaultDeltaTInvalidInput(t *testing.T) {
}
}
func TestDeltaTLeapSecondBoundary(t *testing.T) {
// 闰秒只改 TT−UTC，不改 TT−UT1：ΔT 在闰秒两侧连续，TT−UTC 才跳 1 秒。
func TestDeltaTStaysContinuousAcrossLeapSecond(t *testing.T) {
boundary := 2457754.5
if got := DeltaTv2(boundary); got != 69.184 {
t.Fatalf("DeltaT at leap-second boundary=%v, want 69.184", got)
before := DeltaTv2(boundary - 1e-6)
after := DeltaTv2(boundary + 1e-6)
if math.Abs(after-before) > 1e-3 {
t.Fatalf("ΔT should stay continuous at a leap second: %v → %v", before, after)
}
if step := TTMinusUTCSeconds(boundary+1e-6) - TTMinusUTCSeconds(boundary-1e-6); math.Abs(step-1) > 1e-9 {
t.Fatalf("TT−UTC should step by one second: %v", step)
}
if got := DeltaTSplineY(math.NaN()); !math.IsNaN(got) {
t.Fatalf("DeltaTSplineY(NaN)=%v, want NaN", got)
}
}
func TestTD2UTRoundTrip(t *testing.T) {
func TestUTC2TTRoundTrip(t *testing.T) {
for _, year := range []int{-2000, -720, 0, 26, 1426, 2025, 2027, 3627, 4026, 5000} {
ut := JDECalc(year, 9, 20.123456)
tt := TD2UT(ut, true)
if got := TD2UT(tt, false); math.Abs(got-ut) > math.Nextafter(ut, math.Inf(1))-ut {
t.Errorf("year=%d UT round trip differs by %.9f seconds", year, (got-ut)*86400)
utc := JDCalc(year, 9, 20.123456)
tt := UTC2TT(utc)
if got := TT2UTC(tt); math.Abs(got-utc) > math.Nextafter(utc, math.Inf(1))-utc {
t.Errorf("year=%d UTC round trip differs by %.9f seconds", year, (got-utc)*86400)
}
if got := TD2UT(TD2UT(tt, false), true); got != tt {
if got := UTC2TT(TT2UTC(tt)); got != tt {
t.Errorf("year=%d TT round trip differs by %.9f seconds", year, (got-tt)*86400)
}
}
for _, seconds := range []float64{-70, -1, -0.1, 0, 0.1, 1, 70} {
ut := 2457754.5 + seconds/86400
if got := TD2UT(TD2UT(ut, true), false); got != ut {
t.Errorf("leap second offset=%g round trip differs by %.9f seconds", seconds, (got-ut)*86400)
utc := 2457754.5 + seconds/86400
if got := TT2UTC(UTC2TT(utc)); got != utc {
t.Errorf("leap second offset=%g round trip differs by %.9f seconds", seconds, (got-utc)*86400)
}
}
}
func TestTD2UTCustomDeltaT(t *testing.T) {
func TestUTC2TTRoundTripUnderCustomDeltaT(t *testing.T) {
original := GetDeltaTFn()
t.Cleanup(func() { SetDeltaTFn(original) })
for _, slope := range []float64{0, 0.01} {
@@ -67,9 +73,9 @@ func TestTD2UTCustomDeltaT(t *testing.T) {
}
return 10000 + slope*(jd-2451545)
})
ut := 3000000.123456
if got := TD2UT(TD2UT(ut, true), false); got != ut {
t.Errorf("custom slope=%g round trip differs by %.9f seconds", slope, (got-ut)*86400)
utc := 3000000.123456
if got := TT2UTC(UTC2TT(utc)); got != utc {
t.Errorf("custom slope=%g round trip differs by %.9f seconds", slope, (got-utc)*86400)
}
}
}