SHARP Set-up Notes for October 23, 2008.
John Vaillancourt and Jackie Davidson
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The HWP heaters are all fine, despite my earlier emails.  My confusion
actually stemmed from what mode the Topward PS should be in (serial or
parallel). In the end I played it safe and put it in Individual mode
which lets you set separate voltages.

HWP rotation and read-outs are confirmed to be working.

Gold mirror prior to HWP has some very obvious scratches.  They are
mostly in the lower-right quadrant when the mirror is observed from
the HWP looking backwards along the optical path.  I tried taking
pictures but the scrathces did not show up.  I do not recall seeing
these scratches before.

SHARC-II alignments
   - Files 045525 (exit aperture) and 045526 (entrance aperture).
   - sharcslice was used to make images of the array.
   - fitgauss was used to find the centroids below:
   - exit center:     X = 16.47, Y = 6.62  (off-center by 0.0, 0.1 pixels)
   - entrance center: X = 16.51, Y = 6.72  (off-center by 0.0, 0.2 pixels)
   - no chnages made to SHARC-II alignment

SHARP alignment:
    - Files 045527 and 045530 = entrance aperture
    - Files 045528 and 045529 = exit aperture

    - Centroid offsets from nominal center for entrance from fitgauss:
      H27 = (0.58 L, 0.29 U)     H30 = (0.58 L, 0.29 U)
      V27 = (0.95 L, 0.12 D)	 V30 = (0.95 L, 0.16 D)
      mean HV mis-alignment at entrance: 0.37 LR, 0.15 UD  pixels

    - Centroid offsets from nominal center for exit from fitgauss:
      H28 = (0.82 L, 0.41 U)      H29 = (0.82 L, 0.41 U)
      V28 = (0.70 L, 0.25 U)	  V29 = (0.74 L, 0.21 U)
      mean HV mis-alignment at exit: 0.10 LR, 0.18 UD  pixels
      
    - Parallelism: H = 0.24 LR, 0.12 UD  pixels
      		   V = 0.23 LR, 0.09 UD  pixels  
    - Mean exit/entrance mis-alignment
      	   H = [0.70 L, 0.35 U]
	   V = [0.84 L, 0.05 U]	
	   H - V = [0.14 LR, 0.30 UD]