A Java port (with some tweaks) of the awesome SunCalc JS lib.
// now
Calendar d = Calendar.getInstance();
// Paris coordinates
double LAT = 48.818684;
double LON = 2.323096;
// get a list of phases at a given location & day
List<SunPhase> sunPhases = SunCalc.getPhases(d, LAT, LON);
for(SunPhase e : SunCalc.getPhases(d, LAT, LON))
{
System.out.println("Phase : " + e.getName());
System.out.println("start at : " + e.getStartDate().getTime());
System.out.println("end at : " + e.getEndDate().getTime());
System.out.println("===========================================");
}
// get the sun position (azimuth and elevation) at a given location & time
SunPosition sp = SunCalc.getSunPosition(d, LAT, LON);
Currently supported sun phases are:
- Night (Morning)
- Twilight Astronomical (Morning)
- Twilight Nautical (Morning)
- Twilight Civil (Morning)
- Sunrise (Morning)
- Golden Hour (Morning)
- Daylight
- Golden Hour (Evening)
- Sunset (Evening)
- Twilight Civil (Evening)
- Twilight Nautical (Evening)
- Twilight Astronomical (Evening)
- Night (Evening)
There is an implementation of the moon phases but it has not been really tested, use it at your own risks.
If you try to get sun phases at extremes location (such as poles) you could get invalid dates (such as the famous January 1970)
- Florian Mierzejewski - florian.pub@gmail.com
"THE BEER-WARE LICENSE" (Revision 42):
You can do whatever you want with this stuff.
If we meet some day, and you think this stuff is worth it, you can buy me a beer in return.