67 lines
3.1 KiB
Go
67 lines
3.1 KiB
Go
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package basic
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import (
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"math"
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"time"
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)
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type mercuryEventFunc func(float64) float64
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type mercuryEventCase struct {
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name string
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tolerance float64
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fn mercuryEventFunc
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}
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func mercuryEventSamples() []time.Time {
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start := time.Date(1995, 1, 15, 12, 34, 56, 789000000, time.UTC)
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samples := make([]time.Time, 0, 96)
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for i := 0; i < 48; i++ {
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d := start.AddDate(0, 0, i*137)
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d = d.Add(time.Duration((i%7)*3)*time.Hour + time.Duration((i%11)*7)*time.Minute + time.Duration((i%13)*11)*time.Second)
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samples = append(samples, d)
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}
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extraStart := start.AddDate(0, 0, 41)
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for i := 0; i < 48; i++ {
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d := extraStart.AddDate(0, 0, i*89)
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d = d.Add(time.Duration((i%5)*7)*time.Hour + time.Duration((i%13)*5)*time.Minute + time.Duration((i%17)*19)*time.Second)
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samples = append(samples, d)
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}
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return samples
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}
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func mercuryEventSampleTTJD(date time.Time) float64 {
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return TD2UT(Date2JDE(date.UTC()), true)
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}
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func mercuryEventCases() []mercuryEventCase {
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const (
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conjunctionTolerance = 0.00001
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searchTolerance = 30.0 / 86400.0
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)
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return []mercuryEventCase{
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{name: "LastMercuryConjunction", tolerance: conjunctionTolerance, fn: LastMercuryConjunction},
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{name: "NextMercuryConjunction", tolerance: conjunctionTolerance, fn: NextMercuryConjunction},
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{name: "LastMercuryInferiorConjunction", tolerance: conjunctionTolerance, fn: LastMercuryInferiorConjunction},
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{name: "NextMercuryInferiorConjunction", tolerance: conjunctionTolerance, fn: NextMercuryInferiorConjunction},
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{name: "LastMercurySuperiorConjunction", tolerance: conjunctionTolerance, fn: LastMercurySuperiorConjunction},
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{name: "NextMercurySuperiorConjunction", tolerance: conjunctionTolerance, fn: NextMercurySuperiorConjunction},
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{name: "LastMercuryRetrograde", tolerance: searchTolerance, fn: LastMercuryRetrograde},
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{name: "NextMercuryRetrograde", tolerance: searchTolerance, fn: NextMercuryRetrograde},
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{name: "LastMercuryProgradeToRetrograde", tolerance: searchTolerance, fn: LastMercuryProgradeToRetrograde},
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{name: "NextMercuryProgradeToRetrograde", tolerance: searchTolerance, fn: NextMercuryProgradeToRetrograde},
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{name: "LastMercuryRetrogradeToPrograde", tolerance: searchTolerance, fn: LastMercuryRetrogradeToPrograde},
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{name: "NextMercuryRetrogradeToPrograde", tolerance: searchTolerance, fn: NextMercuryRetrogradeToPrograde},
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{name: "LastMercuryGreatestElongation", tolerance: searchTolerance, fn: LastMercuryGreatestElongation},
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{name: "NextMercuryGreatestElongation", tolerance: searchTolerance, fn: NextMercuryGreatestElongation},
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{name: "LastMercuryGreatestElongationEast", tolerance: searchTolerance, fn: LastMercuryGreatestElongationEast},
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{name: "NextMercuryGreatestElongationEast", tolerance: searchTolerance, fn: NextMercuryGreatestElongationEast},
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{name: "LastMercuryGreatestElongationWest", tolerance: searchTolerance, fn: LastMercuryGreatestElongationWest},
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{name: "NextMercuryGreatestElongationWest", tolerance: searchTolerance, fn: NextMercuryGreatestElongationWest},
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}
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}
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func almostEqualWithinDays(got, want, tolerance float64) bool {
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return math.Abs(got-want) <= tolerance
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}
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