get
A utility method that returns the time of an offset by degrees below or above the horizon of sunrise. Note that the degree offset is from the vertical, so for a calculation of 14 before sunrise, an offset of 14 + AstronomicalCalendar.GEOMETRIC_ZENITH = 104 would have to be passed as a parameter.
Return
The Date of the offset after (or before) sunrise. If the calculation can't be computed such as in the Arctic Circle where there is at least one day a year where the sun does not rise, and one where it does not set, a null will be returned. See detailed explanation on top of the page.
Parameters
the degrees before sunrise to use in the calculation. For time after sunrise use negative numbers. Note that the degree offset is from the vertical, so for a calculation of 14 before sunrise, an offset of 14 + AstronomicalCalendar.GEOMETRIC_ZENITH = 104 would have to be passed as a parameter.