54 lines
2.2 KiB
Go
54 lines
2.2 KiB
Go
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package basic
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import "time"
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type marsEventFunc func(float64) float64
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type marsEventCase struct {
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name string
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tolerance float64
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fn marsEventFunc
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}
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func marsEventSamples() []time.Time {
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start := time.Date(1992, 8, 17, 9, 21, 45, 678000000, 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*311)
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d = d.Add(time.Duration((i%8)*4)*time.Hour + time.Duration((i%10)*9)*time.Minute + time.Duration((i%12)*17)*time.Second)
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samples = append(samples, d)
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}
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extraStart := start.AddDate(0, 0, 53)
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for i := 0; i < 48; i++ {
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d := extraStart.AddDate(0, 0, i*197)
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d = d.Add(time.Duration((i%7)*5)*time.Hour + time.Duration((i%9)*14)*time.Minute + time.Duration((i%16)*23)*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 marsEventSampleTTJD(date time.Time) float64 {
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return TD2UT(Date2JDE(date.UTC()), true)
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}
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func marsEventCases() []marsEventCase {
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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 []marsEventCase{
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{name: "LastMarsConjunction", tolerance: conjunctionTolerance, fn: LastMarsConjunction},
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{name: "NextMarsConjunction", tolerance: conjunctionTolerance, fn: NextMarsConjunction},
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{name: "LastMarsOpposition", tolerance: conjunctionTolerance, fn: LastMarsOpposition},
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{name: "NextMarsOpposition", tolerance: conjunctionTolerance, fn: NextMarsOpposition},
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{name: "LastMarsEasternQuadrature", tolerance: conjunctionTolerance, fn: LastMarsEasternQuadrature},
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{name: "NextMarsEasternQuadrature", tolerance: conjunctionTolerance, fn: NextMarsEasternQuadrature},
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{name: "LastMarsWesternQuadrature", tolerance: conjunctionTolerance, fn: LastMarsWesternQuadrature},
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{name: "NextMarsWesternQuadrature", tolerance: conjunctionTolerance, fn: NextMarsWesternQuadrature},
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{name: "LastMarsProgradeToRetrograde", tolerance: searchTolerance, fn: LastMarsProgradeToRetrograde},
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{name: "NextMarsProgradeToRetrograde", tolerance: searchTolerance, fn: NextMarsProgradeToRetrograde},
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{name: "LastMarsRetrogradeToPrograde", tolerance: searchTolerance, fn: LastMarsRetrogradeToPrograde},
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{name: "NextMarsRetrogradeToPrograde", tolerance: searchTolerance, fn: NextMarsRetrogradeToPrograde},
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}
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}
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