Given that we're measuring different g parameters in the tangential and sagittal planes, I went back to alamode to see what astigmatism I could put into PR2 and/or PR3 to match what we're measuring. I looked at three cases: only PR2 is astigmatic, only PR3 is, or where we split the difference. Since the sagittal measurement matches, I left all the sagittal curvatures the same in
From Koji's post about the scans of the G&H mirrors, it looks entirely reasonable that we could have these levels of astigmatism in the optics.
These all make the same full PRC situation:
g (tangential): 0.966
g (sagittal): 0.939
ARM mode matching: 0.988