the function now accepts only BaseCoordinateFrames or SkyCoords as the definition of the new observer.  This is because these objects contain all the information required to calculate the effect of solar differential rotation as seen from the new observer.
the function now accepts only BaseCoordinateFrames or SkyCoords as the definition of the new observer.  This is because these objects contain all the information required to calculate the effect of solar differential rotation as seen from the new observer.

dpshelio/sunpy,dpshelio/sunpy,dpshelio/sunpy