@@ -101,9 +101,14 @@ def GetDayOfYear(utc_datetime): return delta.days def GetDeclination(day): + """The declination of the sun is the angle between + Earth's equatorial plane and a line between the Earth and the sun. + The declination of the sun varies between 23.45 degrees and -23.45 degrees, + hitting zero on the equinoxes and peaking on the solstices. + """ return 23.45 * math.sin((2 * math.pi / 365.0) * (day - 81)) -def GetEquatorialHorizontalParallax( radius_vector): +def GetEquatorialHorizontalParallax(radius_vector): return 8.794 / (3600 / radius_vector) def GetFlattenedLatitude(latitude): solar.py f3197354125deecfcca51156143e961c020066a2 Brandon Stafford brandon@farb.(none) http://github.com/pingswept/pysolar/commit/3ee9f8309fb56bc31ed96d070b071d81907a78fe 3ee9f8309fb56bc31ed96d070b071d81907a78fe 2008-03-08T13:49:48-08:00 2008-03-08T13:49:48-08:00 Added a docstring, removed some extra whitespace. 19d4619a84075269291cdff46a468e2605e7400e Brandon Stafford brandon@farb.(none)