[Comm2011] Fwd: PPRS-043589-Updated-VST-INSTRUMENT CONTROL SYSTEM-150nm spherical aberation detected at good seeing-Science Operations
Konrad Kuijken
kuijken at strw.leidenuniv.nl
Mon Nov 19 01:29:47 CET 2012
Begin forwarded message:
> From: Paranal_AREmail <esoarspl at eso.org>
> Subject: PPRS-043589-Updated-VST-INSTRUMENT CONTROL SYSTEM-150nm spherical aberation detected at good seeing-Science Operations
> Date: November 19, 2012 1:28:50 GMT+01:00
> To: kuijken at strw.leidenuniv.nl
> Reply-To: Paranal_AREmail <esoarspl at eso.org>
>
> Problem number PPRS-043589 in the Paranal PRS has now been updated.
> The new details of the ticket are listed below.
> This is for your information only.
>
>
> Problem Number : PPRS-043589
>
> Creation Date : 2012-01-22 01:33:59 by Thomas Szeifert (tszeifer at eso.org)
> Type : Problem
> Keywords : 150nm spherical aberation detected at good seeing
> Priority : Necessary
> Deadline :
> Status : On Hold
>
> ----- Minor Change Section ---------------------
>
> -------------------------------------------------
>
> Location : VST
> Area/Instrument Type : CENTRAL CONTROL
> System/Instrument : INSTRUMENT CONTROL SYSTEM
> Sub-system : GUIDING AND WFS SOFTWARE
>
> Assigned to Group : Science Operations
> Assigned to Person : tszeifer
> CC List :
> aparragu at eso.org
> kuijken at strw.leidenuniv.nl
> pietro.schipani at oacn.inaf.it
> par-tios at eso.org
> uweilenm at eso.org
> msterzik at eso.org
> vst at eso.org
> par-vst at eso.org
> acarlier at eso.org
> akaufer at eso.orgVst_all
>
> Telescope Downtime : 00:00
> Workload (hrs.) : 3
> Detailed Description :
> the OMEGACAM WFS detect +200nm spherical aberrations - which I can as well confirm from the off focus images.
>
> The ONECAL table would require a minor modification.
>
> I have sent -200 with vstactguiWrtAber.
>
> Any ONECAL will change this back to the original value (send -200 after ONECAL to be in the best shape)
>
> ----- Worklog & Comments Section ---------------
>
> Worklog and Comments :
> 2012-04-01 03:55:26 vst
> I have still -120nm spherical aberations after ONECALs. Unfortunately I don't know how to correct this except of writing it with the wrtAber GUI after each ONECAL!
>
> TSz
> 2012-05-12 15:57:18 vst
> This is still an open issue. I can only ask the operators to correct the spherical aberrations - I don't know how to add a spherical aberation to the ONECAL.
> 2012-05-12 18:46:58 vst
> I think that it is possible to put the 150nm spherical
> aberrations into the mod2 column of the following table
> where the altitute dependent.
>
> @wtvst:Appl_data:TCS:act:control:calcParams:calibCoeffs.paramCA(0:19,0:36)
>
> I will intend on my next turno.
>
> 1 .Test if the spherical aberrations remains after a telescope SH IA.
> - onecal
> - SH IA (log spherical aberration)
> - OMEGACAM IA
> 2. Measure spherical aberrations with the instrument curvature sensor after ONECAL
> 3. update table with constant -150nm for mod2
> 4. Measure spherical aberrations with the instrument curvature sensor after ONECAL
>
> TSz
> 2012-06-14 12:43:17 smieske
> Hi Thomas,
>
> any update on this?
>
> Steffen
> 2012-07-02 01:42:17 vst
> Yesterday I found in average 120nm spherical aberations (corrected -120 on vstactguiWrtAber).
>
> Today about 100nm, TSz
> 2012-11-19 00:26:33 vst
> I have checked again with the telescope SH sensor that there is no spherical aberation between the Sh sensor
> of VST and the WFS of OMEGACAM.
>
> We have yesterday setup an offset of -100nm in the ONECAL table. I will issue a ticket to archive the modified ONECAL table.
>
> Put on hold until the consfiguration is archived
>
> Status Changed: On Hold
> Modified By: vst
> Modified Date: 2012-11-19 00:26:33
> Status Changed: On Hold
> Modified By: vst
> Modified Date: 2012-11-19 00:26:33
>
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