Subject: Re: [sloan-25mlog 2571] 2.5m obslog 20150912 (SJD 57278)
From: Dan Long
Date: Sun, 13 Sep 2015 06:49:52 -0600
On Sep 13, 2015, at 6:03 AM, dmbiz@apo.nmsu.edu wrote:
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>                       APACHE POINT OBSERVATORY SDSS 2.5M
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>                                 OBSERVING LOG
>                          Saturday September 12, 2015
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>                                  (SJD 57278)
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> ----  Observing Team ----
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> Viktor Malanushenko
> Dmitry Bizyaev
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> ---- Observing Summary ----
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> Mostly clear night with some very light structure in the sky.
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> MANGA:=20
> 4 8626: completed
> 5 8616: completed
> 6 completed all-sky plate test with plate 8069.
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> APOGEE:=20
> 8626 : 3 missing, 7 faint fibers
> 8616 : 1 missing, 6 faint
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> eBOSS:
> 12 7857 : done
> 11 7836 : done
> 13 7827 : done
> 17 7631 : started
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> Some 22 minutes were lost to multiple adjustment of b1 blue ring on =
cart 12, see
> details in the log.=20
> Problems to highlight:
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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> MaNGA S/N was not calculated for some exposures in plate 8616.=20
> We tried to re0sun then, but dosRerun command failed on this plate, =
see log for
> detail.=20
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> In the evening Status commands reported very high, but consistent, =
temperatures
> of sp2:
> 00:47:36 APO.dmbiz 12 boss i sp2Temp=3D27.5,28.5,26.8,27.1,28.7,27.5
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> Median spectrographs temperatures:
>     Tsp1=3D 14.4,  Tsp2=3D 27.5; =20
>     Outside air temperature=3D 15.3; =20
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> Is looks consistent through all night measurements.
> What warms up sp2 by >10C above the ambient temperature?
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> Fiducial Monitor in STUI doesn't show Az fiducials.=20
> We saw that this information existed in STUI's log during the =
afternoon
> checkout: azFiducialCrossing data were collected.
> Later in the night we saw no any azFiducialCrossing recorded,
> although altFiducialCrossing and rotFiducialCrossing were all
> there. It did not affect pointing during the night.
> Please check in the day time.
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  The spectrograph temperatures on sp2 are incorrect due to a problem =
with the temperature monitor reference on the little giant board.  It is =
on the list for the next engineering time to examine it (it will mean =
powering down the mechanicals).
   Looking at the tron logs, there hasn't been an azimuth fiducial =
crossing since Friday afternoon.  This is when fiducials were cleaned, =
so I suspect that the read head got some alcohol residue on it then =
(hopefully not bumped).  I will check later today.
		Cheers,
		   Dan=