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Commissioning Notes from 18-19 May 2008 MST

Observers: Doug M on mountain and Andrew R in Tucson.

T.O.: Randy G.


Rotated WFS by the correct amount, verified improved closed loop performance. Showed convergence from 4000 nm of applied Z7 in two iterations, 6000 nm of applied Z4 in several iterations, mixed modes giving ~ 2000nm aberration in several iterations. Seems to work pretty well, converges to ~+/- 50 nm on z4-z11, and this in seeing ranging from 1.5"-2.5". Also we can see a way to improve on this without too much more effort.

Went off-axis and verified that the focus off-set calculated (between off-axis star and IRTC, from field curvature) is approximately correct, and that the pupil shift on the WFSC with field angle is approximately as calculated (~+/-10% of where it should be).

Started to determine orientation of y-axis of AGW stage in PM coordinates when we were stopped by bad weather and multiple GCS failures.

Nighttime Activities

-- AndrewRakich - 20 May 2008
Topic revision: r1 - 20 May 2008, AndrewRakich
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