This plot shows the pixel shift introduced by the IRDIS optical distortion. The left four boxes are for the left beam and the right four boxes are for the right beam.</font><p><font size="2">
The four lowest order polynomial coefficients are applied to four reference
pixel positions in the 1024x1024 large FOV</font><p><font size="2">
<ul>
<li>upper left  quadrant (UL): x=12,y=1012  (512 +- 500)
<li>upper right quadrant (UR): x=1012,y=1012
<li>lower left  quadrant (LL): x=12,y=12
<li>lower right quadrant (LR): x=1012,y=12
</ul>
</font><p><font size="2">E.g.<br>
Box (1) shows the shift for pixel [512-500,512+500] in the upper left (UL) quadrant of the 1024x1024 pixel large FOV of the left channel.<br>
Box (6) shows the shift for pixel [512+500,512-500] in the lower right (LR) quadrant of the 1024x1024 pixel large FOV of the left channel.<br> 
</font><p><font size="2">
This plot is provisional, as the irdis distortion recipe is not yet fully
operational.