Subject: Re: [sloan-25mlog 2069] focus ring setup
From: Kaike Pan
Date: Tue, 20 Jan 2015 12:41:57 -0700
Hi Elena,
We should use the midpoint of two extreme (the lowest and highest), not =
average.
So SP1 from -2.3 to 2.0, it=92s almost perfect.
SP2 from -3.2 to 1.3, if we adjust the residual -1.0 degrees (move B2 =
focus ring
by +2 degrees), we will have residual distribution of -2.2 to 2.3.  =
However, this
set of cartridges don=92t include some extreme cartridge. If all =
cartridges are used,
we usually have residual distribution of -3.5 to +3.5 degrees (not much =
room for=20
adjustment). Consider all of these factors, I recommend that we don=92t =
adjust focus
rings if all residuals are within -3.5 to +3.5 degrees.=20
-kaike
> On Jan 20, 2015, at 12:26 PM, Elena Malanushenko  =
wrote:
>=20
> Kaike and  all,=20
>=20
> I looked at  for last night hartmann residuals
> Sunday January 18, 2015  (SJD 57041)
> Ct      b1      b2 (residuals)
> 12     2.0    -2.7
> 13     0.2    -1.7
> 14     0.8     1.3
> 15     0.3    -2.2
> 3      -1.6    -3.2
>  1     -1.3    -2.7
>  4     -2.3    -1.7
> ----------------------------
> avr    b2      -1.84
>=20
> I wanted to adjust b2 residuals  by -2 degrees.
> Based on our method, I needed to turn b2 by -4.
>=20
> I did preliminary hartmann, got b2 res 0.8 as reference.
> And my goal was to change it to 2.8.
>=20
> To be on safe side, I adjusted blue ring by -2 degrees
> first (instead of -4),  and got b2 residuals 3.3.=20
> As 0.5 difference is in our range, I accepted this.=20
>=20
> Regards, Elena
>=20
>
>=20
> On 01 /20/ 15, at 11:50 AM, Joseph Huehnerhoff wrote:
>=20
>> Excellent,  thank you for confirming. =20
>>=20
>> Joe
>>=20
>>> On Jan 20, 2015, at 10:48 AM, Kaike Pan  wrote:
>>>=20
>>>=20
>>> Yes, the last movement is always from the positive side. This is in =
the procedure so I didn=92t repeat here.=20
>>>=20
>>> -kaike
>>>=20
>>>> On Jan 20, 2015, at 11:39 AM, Joseph Huehnerhoff =
 wrote:
>>>>=20
>>>> Kaike, Can you point me to the =93Observing Tips=94 page, I can=92t =
seem to find it?
>>>>=20
>>>> I want to make sure that your procedure includes accounting for =
lash in the system.  This means you should ALWAYS approach from the same =
direction.
>>>>=20
>>>> For example: if you need to move it -5 degrees.
>>>> 1) move it -10 degrees
>>>> 2) move it +5 degrees
>>>> 3) cumulative move is -5 degrees, but it approached from the =
positive side
>>>>=20
>>>> Second Example:  If you need to move it +5 degrees
>>>> 1) move it -5 degrees
>>>> 2) move it +10 degrees
>>>> 3) cumulative move was +5 degrees but it came from a very positive =
direction
>>>>=20
>>>> Even though the threads on the ring are precision, you should =
always follow a procedure like this to make sure that there is no lash =
in the meshing of the threads that is causing error in the measurement.
>>>>=20
>>>> Let me know if this is unclear or you have questions.
>>>>=20
>>>> Joe
>>>>=20
>>>>> On Jan 20, 2015, at 10:19 AM, Kaike Pan  wrote:
>>>>>=20
>>>>> Hello All,
>>>>>=20
>>>>>  We had some difficulty to setup focus ring last night. I went =
through residuals on each cartridges, and
>>>>> here are what I found.
>>>>>=20
>>>>> Elena found that the night before residuals on SP2 was offset by =
-1 degrees (this means that we need
>>>>> to adjust B2 focus ring by -2 degrees, I double checked and =
confirm that the offset is correct), and=20
>>>>> adjusted B2 focus ring, but it was over adjusted (unfortunately We =
don=92t don=92t have much room on this). =20
>>>>> SP2 residual went from 0.8 degrees to 3.3 degrees. That actually =
adjustment is 2.5 degrees, i.e. B2 focus
>>>>> ring was moved by -5 degree instead of -2 degrees.  Elena actually =
moved B2 focus ring by -2 degrees=20
>>>>> based on marks the focus ring,  but hartmann exposures indicated =
that the ring was moved by -5 degrees.=20
>>>>>=20
>>>>> It will be extremely hard to get the ring where we want perfectly, =
but let=92s try to get it within 1 degree. Please
>>>>> see =91Observing tips=94 page on wiki on how to adjust focus ring =
during afternoon checkout and during night
>>>>> operation. In short, please don't adjust the full amount that SOP =
asks for during night operation. (if you do so,=20
>>>>> you will need to adjust that focus ring on other cartridges).
>>>>>=20
>>>>> I will be on site to set focus ring this afternoon. Looks like =
that we need to adjust B1 focus rings by -9.5 degrees,
>>>>> B2 by -3.5 degrees.=20
>>>>>=20
>>>>> -kaike
>>>>>=20
>>>>>=20
>>>>>> On Jan 20, 2015, at 6:30 AM, viktorm@apo.nmsu.edu wrote:
>>>>>>=20
>>>>>>=20
>>>>>>                     APACHE POINT OBSERVATORY SDSS 2.5M
>>>>>>=20
>>>>>>                               OBSERVING LOG
>>>>>>                        Monday January 19, 2015
>>>>>>=20
>>>>>>                                (SJD 57042)
>>>>>>=20
>>>>>> ----  Observing Team ----
>>>>>>=20
>>>>>> Dan Oravetz
>>>>>> Viktor Malanushenko
>>>>>> Olena Malanushenko (afternoon checkout)
>>>>>>=20
>>>>>> John Parejko on-line
>>>>>> Conor Sayres by phone
>>>>>>=20
>>>>>> ---- Observing Summary ----
>>>>>>=20
>>>>>> Partly coudy night with good seeings.
>>>>>>=20
>>>>>> eBOSS:
>>>>>> ct=3D10, pl=3D7830=20
>>>>>> ct=3D13, pl=3D7681 - done
>>>>>> ct=3D11, pl=3D7690=20
>>>>>> ct=3D14, pl=3D8281 - done
>>>>>> ct=3D15, pl=3D7287 - done
>>>>>>=20
>>>>>> MaNGA+APOGEE:
>>>>>> ct=3D5, pl=3D8252,  APOGEE-2&MaNGA; MJ145.10025+47.73576; 4xNSE + =
6xABBA;=20
>>>>>>               missing fibers 55,184,195,211
>>>>>> ct=3D4, pl=3D8258,  APOGEE-2&MaNGA; MJ166.81628+43.78248; 2xNSE + =
3xABBA;
>>>>>>               missing fibers 20,39,195,278,288
>>>>>>=20
>>>>>>=20
>>>>>> Remarks:
>>>>>>=20
>>>>>> (i) Netburner problem during 'sp2 data read out (193127)'
>>>>>> We recovered exposure and send e-mail to John Parejko to copy
>>>>>> exposures to proper location. Detail in to 'Problems' section
>>>>>> John moved files to proper location. Problem was fixed.
>>>>>>=20
>>>>>> (ii) approx at 5:55Z we are getting an "Internal Server Error" =
when trying to
>>>>>> access Petunia: 'Plan Observing'. We send e-mail to Conor Sayres =
about that.
>>>>>> At the 6:50Z Conor fixed it. The description problem in =
'Problems' section.=20
>>>>>>=20
>>>>>> (iii) Blue ring unusual:
>>>>>> We moved blue rings:
>>>>>> to cart 11 sp2 on +11 degree;
>>>>>> to cart 5  sp2 on -9 degree, then on -26 degree; sp1 on -9 =
degree.
>>>>>>          (probably, Viktor moved first time at +9 degree ? )
>>>>>> to cart 4  sp2 on +11 degree;=20
>>>>>>=20
>>>>>> (iv) for the cart.5 plate 8252 DOS did not show us 'FLAT' to both =
precal &
>>>>>> postcal. But we have apparently S/N information.
>>>>>>=20
>>>>>> (v) for the cart.4 plate 8258 DOS unable to reduce for 'b2'
>>>>>>  detail in to 'Log' section
>>>>>>=20
>>>>>>=20
>>>>>> ---- Observing Plan ----
>>>>>>=20
>>>>>> Mon 19 JAN 2015   =20
>>>>>>=20
>>>>>> Mon 19 JAN 2015    57042.0   0.01    01:36  12:53    02:29  13:48 =
    ----   =20
>>>>>> eBOSS until 07:02 ( 5.5 h), then MaNGA ( 5.8 h)=20
>>>>>>=20
>>>>>> MaNGA starts early by 1 hour 20 minutes every night from =
57039-57048.=20
>>>>>>=20
>>>>>>=20
>>>>>>=20
>>>>>> ---- Observing Log ----
>>>>>>=20
>>>>>> Tested actors, reviewed status, all ok but boss.
>>>>>>=20
>>>>>> 1st boss ping gave me error message, but=20
>>>>>> 2nd was ok.=20
>>>>>>=20
>>>>>>=20
>>>>>> 22:23:30 APO.elenam 7 boss f text=3D"command failed: =
error('Invalid response from=20
>>>>>> Netburner.',) at=20
>>>>>> =
/home/sdss4/products/Linux64/boss/v3_5/python/boss/DAQInterface.py:1435"
>>>>>> 22:23:30 CmdDone: APO.elenam 7 boss ping
>>>>>> and 15 times the next:
>>>>>> 22:23:30 .boss 1127 boss w text=3D"this command has already been =
finished!!!!=20
>>>>>> (APO.elenam 1127): ping"
>>>>>>=20
>>>>>>=20
>>>>>> ----- Collimation -----
>>>>>>=20
>>>>>> 23:03:02 Hartmann collimate output on cart #10
>>>>>> sp1: offset: r=3D-1649 (Out of focus);  b=3D-2.4 (In Focus)=20
>>>>>> sp2: offset: r=3D-315 (In Focus);  b=3D2.6 (In Focus)=20
>>>>>> sp1: pred. move: spAverageMove=3D -439
>>>>>> sp2: pred. move: spAverageMove=3D -567
>>>>>> sp1: pred. spResiduals: r=3D-1210, b=3D-3.8, txt=3DOK, spTemp =3D =
7.9
>>>>>> sp2: pred. spResiduals: r=3D252, b=3D0.8, txt=3DOK, spTemp =3D =
7.6
>>>>>>=20
>>>>>> moved b2 by -2 degrees based on last night collimations:=20
>>>>>>=20
>>>>>> 23:23:11 Hartmann collimate output on cart #10
>>>>>> sp1: offset: r=3D-989 (In Focus);  b=3D-4.4 (Out of focus)=20
>>>>>> sp2: offset: r=3D631 (In Focus);  b=3D4.5 (Out of focus)=20
>>>>>> sp1: pred. move: spAverageMove=3D 212
>>>>>> sp2: pred. move: spAverageMove=3D -409
>>>>>> sp1: pred. spResiduals: r=3D-1201, b=3D-3.8, txt=3DOK, spTemp =3D =
8.1
>>>>>> sp2: pred. spResiduals: r=3D1040, b=3D3.3, txt=3DOK, spTemp =3D =
7.8
>>>>>>=20
>>>>>> motorPosition
>>>>>>   sp1:     130,     137,     151; =20
>>>>>>   sp2:   16420,   15582,   16793;=20
>>>>>>=20
>>>>>> Median spectrographs temperatures:
>>>>>>   Tsp1=3D 7.8,  Tsp2=3D 7.4; =20
>>>>>>   Outside air temperature=3D 9.9; =20
>>>>>>=20
>>>>>=20
>>>>> ____________________________________________________________
>>>>> Logs of Nightly APO Activities
>>>>> =
https://trac.sdss.org/tracmailman/browser/private/sloan-25mlog/index.html
>>>>=20
>>>=20
>>=20
>=20