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E_NoRiseSet |
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E_NoRiseSet is the exception class used when no rise, set or twilight can be calculated.
Unit Moon
Description
E_NoRiseSet is raised when the calculation of a moon/sun rise or set is not possible because the moon (or sun) is below or above the horizon for the whole day, or does not reach the elevation needed for the twilight. This happens especially for the polar winter. |