shaah
A method that returns a shaah zmanis (temporal hour) according to the opinion of the GRA. This calculation divides the day based on the opinion of the GRA that the day runs from sea level sunrise to sea level sunset or sunrise to sunset (depending on the isUseElevation setting). The day is split into 12 equal parts with each one being a shaah zmanis. This method is similar to temporalHour, but can account for elevation.
Return
the long millisecond length of a shaah zmanis calculated from sunrise to sunset. 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.