func ExampleMean_b() {
// Example 12.b, p. 89.
jd := julian.TimeToJD(time.Date(1987, 4, 10, 19, 21, 0, 0, time.UTC))
fmt.Printf("%.4d\n", sexa.NewFmtTime(sidereal.Mean(jd)))
// Output:
// 8ʰ34ᵐ57ˢ.0896
}
func ExamplePoly1900to1997() {
// Example 10.a, p. 78.
jd := julian.TimeToJD(time.Date(1977, 2, 18, 3, 37, 40, 0, time.UTC))
year := base.JDEToJulianYear(jd)
fmt.Printf("julian year %.1f\n", year)
fmt.Printf("%+.1f seconds\n", deltat.Poly1900to1997(jd))
// Output:
// julian year 1977.1
// +47.1 seconds
}
func ExampleHorizontal_EqToHz() {
// Example 13.b, p. 95.
eq := &coord.Equatorial{
RA: unit.NewRA(23, 9, 16.641),
Dec: unit.NewAngle('-', 6, 43, 11.61),
}
g := &globe.Coord{
Lat: unit.NewAngle(' ', 38, 55, 17),
Lon: unit.NewAngle(' ', 77, 3, 56),
}
jd := julian.TimeToJD(time.Date(1987, 4, 10, 19, 21, 0, 0, time.UTC))
st := sidereal.Apparent(jd)
hz := new(coord.Horizontal).EqToHz(eq, g, st)
fmt.Printf("A = %+.3j\n", sexa.FmtAngle(hz.Az))
fmt.Printf("h = %+.3j\n", sexa.FmtAngle(hz.Alt))
// Output:
// A = +68°.034
// h = +15°.125
}
func ExampleHorizontal_EqToHz() {
// Example 13.b, p. 95.
eq := &coord.Equatorial{
RA: sexa.NewRA(23, 9, 16.641).Rad(),
Dec: sexa.NewAngle(true, 6, 43, 11.61).Rad(),
}
g := &globe.Coord{
Lat: sexa.NewAngle(false, 38, 55, 17).Rad(),
Lon: sexa.NewAngle(false, 77, 3, 56).Rad(),
}
jd := julian.TimeToJD(time.Date(1987, 4, 10, 19, 21, 0, 0, time.UTC))
st := sidereal.Apparent(jd)
hz := new(coord.Horizontal).EqToHz(eq, g, st)
AStr := fmt.Sprintf("%+.3j", sexa.NewFmtAngle(hz.Az))
hStr := fmt.Sprintf("%+.3j", sexa.NewFmtAngle(hz.Alt))
fmt.Println("A =", AStr)
fmt.Println("h =", hStr)
// Output:
// A = +68°.034
// h = +15°.125
}