+1 I also have requested Rotation Angle in FITS Header data. This would be very helpful when after a night of imaging, you have 60 images, and after Meridian Flip, there was a slight change in Rotation Angle. Id like to use PixInsight, Blink, to show the Series Analysis Report, to list the Rotation Angle for each and every image.
+1 for also being able to add it to the Image Name itself, that would actually be easier than the method i was looking to use. You could easily see which Rotation Angle is the most prominent.