Fix systematic error in time coordinate
-
Deal with CSYERfor the time coordinate. -
Also, what's with LONPOLE,LATPOLE,MJDREFadded byastropy.WCS. -
Also, change the units of WCS keywords to be consistent with L1.
CSYER for the time coordinate.LONPOLE, LATPOLE, MJDREF added by astropy.WCS.