func TestTopoPlanet(t *testing.T) {
nt := novas.Date(2012, 12, 13, 12, 0, 0, 0, time.UTC)
sun := novas.Sun()
place := novas.NewPlace(53.21853, 6.5670, 0, 18, 1010)
data := sun.Topo(nt, place, novas.REFR_NONE)
tests := [][3]string{
{"Distance in AU", "0.984414", fmt.Sprintf("%.6f", data.Dis)},
{"Altitude", "13.278250", fmt.Sprintf("%.6f", data.Alt)},
{"Azimuth", "187.524224", fmt.Sprintf("%.6f", data.Az)},
}
for _, test := range tests {
if test[1] != test[2] {
t.Errorf("%s: expected %s, got %s", test[0], test[1], test[2])
}
}
}
func TestAppPlanet(t *testing.T) {
nt := novas.Date(2012, 12, 13, 12, 0, 0, 0, time.UTC)
sun := novas.Sun()
data := sun.App(nt)
tests := [][3]string{
{"Right ascension", "17.411478", fmt.Sprintf("%.6f", data.RA)},
{"Declination", "-23.187681", fmt.Sprintf("%.6f", data.Dec)},
{"Distance in AU", "0.984424", fmt.Sprintf("%.6f", data.Dis)},
{"Ecliptic longitude", "261.890295", fmt.Sprintf("%.6f", data.ELon)},
{"Ecliptic latitude", "0.001756", fmt.Sprintf("%.6f", data.ELat)},
}
for _, test := range tests {
if test[1] != test[2] {
t.Errorf("%s: expected %s, got %s", test[0], test[1], test[2])
}
}
}
func main() {
latitude, longitude := 53.21853, 6.5670 // Groningen, The Netherlands
// END OF USER SETTINGS
now := novas.Now()
fmt.Println(now)
geo := novas.NewPlace(latitude, longitude, 0, 20, 1010)
fmt.Println("\nLocation:", geo, "\n")
sun := novas.Sun()
fmt.Printf("Distance from earth's center: %.7f AU\n", sun.App(now).Dis)
data := sun.Topo(now, geo, novas.REFR_NONE)
fmt.Printf("Distance from surface location: %.7f AU\n\n", data.Dis)
fmt.Printf("Altitude: %7.3f°\nAzimuth: %7.3f°\n\n", data.Alt, data.Az)
fmt.Println(" Azimuth Altitude")
t0 := novas.Date(now.Year(), int(now.Month()), now.Day(), 0, 0, 0, 0, now.Location())
t1, topo, err := sun.Rise(t0, geo, sundip, time.Second, novas.REFR_NONE)
if err != nil {
fmt.Println(err)
} else {
fmt.Printf("Sun rise: %8.2f° %s\n", topo.Az, t1)
t0 = t1
}
t1, topo, err = sun.High(t0, geo, time.Second, novas.REFR_NONE)
if err != nil {
fmt.Println(err)
} else {
fmt.Printf("High noon: %8.2f° %8.2f° %s\n", topo.Az, topo.Alt, t1)
t0 = t1
}
t1, topo, err = sun.Set(t0, geo, sundip, time.Second, novas.REFR_NONE)
if err != nil {
fmt.Println(err)
} else {
fmt.Printf("Sun set: %8.2f° %s\n", topo.Az, t1)
t0 = t1
}
t1, topo, err = sun.Low(t0, geo, time.Second, novas.REFR_NONE)
if err != nil {
fmt.Println(err)
} else {
fmt.Printf("Deep night:%8.2f° %8.2f° %s\n\n", topo.Az, topo.Alt, t1)
t0 = t1
}
fmt.Println("Start of seasons in northern hempisphere")
fmt.Println("Spring:", novas.Spring(now.Time.Year(), time.Second))
fmt.Println("Summer:", novas.Summer(now.Time.Year(), time.Second))
fmt.Println("Autumn:", novas.Autumn(now.Time.Year(), time.Second))
fmt.Println("Winter:", novas.Winter(now.Time.Year(), time.Second))
}