This plot shows the x-position of the optical axis derived from the
irdis distortion recipe.  The ST_ALC2 stop is in the optical path.
<br>
Optical axis x-positions of the right beam refer to the right beam product
extension with
size 1024x1024 pixel covering the pixel area x=[<b>1025</b>,2048], y=[1,1024]
of the raw frame.
</font><p><font size="2">
This plot is provisional, as the irdis distortion recipe is not yet fully operational.