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Misalignment measured during April 2002
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===============
26rd April data
===============
Table 1:
=======
p stop SECONDARY | PUPIL STOPS
|
center radius | center obs. radius outer radius measured scale angle offset
(x,y) pix (pix) | (x,y) pix (pix) (mm) (pix) (mm) (mm/pix) applied to pstop wheel
=============================================================================================================
naomi-clr(a) 513,525 135 517,493 --- ---- 87 1.948 0.0223 -1deg
naomi-clr(b) 513,525 135 522,494 --- ---- 87 1.948 0.0223 -0.9deg
naomi-clr(c) 513,525 135 526,493 --- ---- 87 1.948 0.0223 -0.8deg
naomi-obs 513,525 135 515,495 28? 0.88 87 1.948 0.0223 -1deg
osca-clr 513,525 135 514,492 -- ---- 77 1.61 0.021 -0.9deg
osca-obs (a) 513,525 135 518,493 18? 0.689 75 1.61 0.021 -0.9deg
osca-obs (b) 513,525 135 511,495 16? " 76 1.61 0.021 -1deg
cass-k 513,525 135 511,490 145 3.68 490 11.96 0.024-0.025 -1deg
cass-j 513,525 135 510,490 148 3.68 469 11.96 0.024 -0.8deg
cass-h 513,525 135 513,490 149 3.68 470 11.96 0.025 -0.8deg
cass-s 513,525 135 511,488 145 3.41 491 12.625 0.026 -0.9d
Table 2: (See notes below)
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Misalignment applied offset demand DVAL final DVAL DVAL for best alignment
(pix) (deg) of each stop
x y
------------------------------------------------------------------------------------------------
naomi-clr(a) -4 32 -1deg 238.029 237.029 236.949 (infered from data)
naomi-clr(b) -9 31 -0.9deg 238.029 237.129 -------
naomi-clr(c) -13 32 -0.8deg 238.029 237.229 -------
naomi-obs -2 30 -1deg 275.7467 274.7467 274.7467
osca-clr -1 33 -0.9deg 5.84587 4.98587 4.98587
osca-obs (a) -5 32 -0.9deg 44.653206 43.7532 -------
osca-obs (b) 2 30 -1.0deg 44.653206 43.6532 43.6532
cass-k 2 35 -1deg 198.743 197.743 197.743
cass-j 3 35 -0.8deg 121.442 120.642 120.642
cass-h 0 35 -0.8deg 160.150 159.315 159.315
cass-s 2 37 -0.9deg 83.0642 82.1642 82.1642
NOTES:
-----
* Misalignment=diff. in central position of secondary & pupil stop in pixels. Obtained
from data in Table 1, for each pstop after offseting the pstop wheel
by the amount estated in column 3.
applied offset=After requesting a pstop position (e.g. pstop ingrid cass-j), the offset
indicated here was applied to the pstop wheel. The missalignments given
here refer to the final position of the pupil stop.
demand DVAL=value read from the engineering mimic after requesting one position.
final DVAL=value read from the engineering mimic after offseting the pstop wheel
by the amount in column 3.