get_epoch¶
- sofia_redux.scan.utilities.utils.get_epoch(equinox)[source]¶
Return an astropy frame representing the equinox of an observation.
An FK4 frame will be returned in instances where
equinoxis a string and the first letter is ‘B’ (B1950 for example), or the year is less than 1984. In other instances a Julian FK5 frame will be returned.- Parameters:
- equinoxBaseCoordinateFrame or Time or float or int or str
The equinox of the observation
- Returns:
- epochBaseCoordinateFrame
Typically and FK5 or FK5 frame unless another BaseCoordinateFrame was passed in as
equinox.