Date: Thu, 22 Aug 2013 15:29:00 -0400 (EDT)
From: jegunn
Subject: Re: [sdss3-25mlog 1342] Re: 2.5m obslog 20130821 (MJD 56526)
Actuall, a *deci*-SDSS clearance unit.. ;-)).
1 SDSS clearance unit = 3/8 inch ~ 1 cm....
Which, historically, is how close various eminently destructable
(and expensive) things on the telescope get to the forks or the floor as
the telescope and rotator move.
--j
On Thu, 22 Aug 2013, Dan Long wrote:
> Right.  No spacers were touched during the shutdown (dewar, optics barrel, saddlebags come off and go on as a unit).  Just had to move focus rings to gain a few sdss clearance units during camera removal/installation.
>
> -Dan
>
> On Aug 22, 2013, at 1:04 PM, jegunn wrote:
>
>> We didn't touch the spacers.
>>
>> --jim
>>
>> On Thu, 22 Aug 2013, Kyle Dawson wrote:
>>
>>> In a wild world, I could imagine getting the spacers incorrect.  We'll take a look at the hartmanns and arcs to evaluate coma/tilt.
>>>
>>>
>>> On Aug 22, 2013, at 12:30 PM, jegunn
>>> wrote:
>>>
>>>>
>>>> Any idea how this happened? We did not touch the focus rings, so the
>>>> focus SHOULD not have changed since the cameras were last used; the
>>>> incoming beam is parallel, so dismounting and remounting the cameras should cause no focus change at all....
>>>>
>>>> --jim
>>>>
>>>> On Thu, 22 Aug 2013, Dan Long wrote:
>>>>
>>>>> Hi Kaike,
>>>>>
>>>>> B1 was _really_ out of focus.  It took about a turn-and-a-half to get it close enough for spCollimate to make sense of how much to turn it.  You should be able to fine tune it now.
>>>>>
>>>>> 		Cheers,
>>>>>
>>>>> 		   Dan
>>>>>
>>>>>
>>>>> On Aug 22, 2013, at 2:26 AM, kpan@apo.nmsu.edu wrote:
>>>>>
>>>>>>
>>>>>>                     APACHE POINT OBSERVATORY SDSS 2.5M
>>>>>>
>>>>>>                               OBSERVING LOG
>>>>>>                        Wednesday August 21, 2013
>>>>>>
>>>>>>                                (MJD 56526)
>>>>>>
>>>>>> ----  Observing Team ----
>>>>>>
>>>>>> Kaike Pan
>>>>>> John Parejko
>>>>>> Jon Brinkmann
>>>>>>
>>>>>> Support: Stephen Bailey
>>>>>>       David Schlegel
>>>>>>
>>>>>> ---- Observing Plan ----
>>>>>>
>>>>>> Checkour BOSS spectrographs, collimation tests
>>>>>>
>>>>>> ---- Observing Summary ----
>>>>>>
>>>>>> Reset focus rings for both r1 and r2 so that collimator are in the middle
>>>>>> points when they are focused,
>>>>>>
>>>>>> Took BOSS 30 biases: 165060-89.
>>>>>> Took 5+18 900 sec darks: 165090-94, 165134-51.
>>>>>>
>>>>>> took some test exposures for John P.: 165123-31.
>>>>>>
>>>>>> We started exhaustfan and opened louvers at 7:30Z. Jack and Patrick has
>>>>>> kindly agreed to stop the ventilation if weather becomes bad. They will
>>>>>> leave the ventilation on if weather is good in the morning.
>>>>>>
>>>>>> We noticed that 10L dewars were autofilled at 11:00 PM, so looks
>>>>>> like that the auto fill problem we had last night was fixed.
>>>>>>
>>>>>> Problem:
>>>>>> 1. could not load cartridge. John P. reversed platedb actor to the previous
>>>>>> version and fixed it.
>>>>>> 2. Had issue in starting sos damemon processes, with helps from Stephen B. and
>>>>>> David S., we were able to started them without connecting to outside.
>>>>>> 3. Sos was not be able to reduce flat and arc because of lacking access to
>>>>>> plug-map files. With Stephen's help, John and Jon found that it was due to
>>>>>> missing a dependency, liblapack on sos3, and fixed.
>>>>>> 4. B1 camera could not be focused. See log body.
>>>>>>
>>>>>
>>>>> _____________________________________________________
>>>>> Message 1336 of sdss3-25mlog - Logs of nightly APO activities.
>>>>> https://trac.sdss3.org/tracmailman/browser/private/sdss3-25mlog/all/1336.html
>>>>> sdss3-25mlog@sdss3.org
>>>>> https://sdss3.org/mailman/listinfo/sdss3-25mlog
>>>>>
>>>> _____________________________________________________
>>>> Message 1342 of sdss3-25mlog - Logs of nightly APO activities.
>>>> https://trac.sdss3.org/tracmailman/browser/private/sdss3-25mlog/all/1342.html
>>>> sdss3-25mlog@sdss3.org
>>>> https://sdss3.org/mailman/listinfo/sdss3-25mlog
>>>
>>>
>
>