shaah
A method that returns a shaah zmanis (temporal hour) according to the opinion of the Magen Avraham (MGA) based on a 72 minutes alos and tzais. This calculation divides the day that runs from dawn to dusk (for sof zman krias shema and tfila). Dawn for this calculation is 72 minutes before sunrise or sea level sunrise (depending on the isUseElevation elevation setting) and dusk is 72 minutes after sunset or sea level sunset (depending on the isUseElevation elevation setting). This day is split into 12 equal parts with each part being a shaah zmanis. Alternate methods of calculating a shaah zmanis according to the Magen Avraham (MGA) are available in the subclass ComplexZmanimCalendar.
Return
the long millisecond length of a shaah zmanis. 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, Long.MIN_VALUE will be returned. See detailed explanation on top of the AstronomicalCalendar documentation.