sot/eng_archive — comment on commit 1acd02e48303b6ea6229a62e120a7d02f0c54f9f
File: Ska/engarchive/derived/pcad.py line 122
By taldcroft:

As long as there is a float *anywhere* in the computation then other integers will be changed to float appropriately. So 98% of the time you don't need to multiply by 1.0.