From: kaike pan
Subject: Re: [sdss3-25mlog 24] 2.5m obslog 20110302 (MJD 55623)
Date: Thu, 3 Mar 2011 09:14:19 -0700
>
> We needed to move the blue camera rings (significantly) once in the
> afternoon
> and once in the middle of the night. We lost ~20 minutes when
> observing cart 15.
Looks like that b1 focus ring was setup for a temperature that was
a little too warm. On the first cartridge, b1 focus ring requested
a move of -3.0 degrees. I suggest we set up b1 ring so that we have
a move request of + 3 to 4 degrees for the first cartridge. In most
cases,
it will be okay.
    I also suggest that we check and adjust focus ring when
spectrographs are
in temperature equilibrium. This says we should do adjustments before
starting evening ventilation.
>
> Short hartmann exposures failed after all (except one) of our
> gotoFields
> tonight. We noticed that all hartmann images were normal, all
> cameras were
> either in focus or really close to being in focus, and all of the
> requested
> collimator motor adjustments were made (even after the error
> messages were
> given). We did not issue a second set of hartmanns. We just went on
> to take
> cals. Ticket #1239.
       I feel that this happens quite frequently recently.  It seems
that everything is fine,
short hartmann was taken, collimator pistons get to their
destinations commanded
based on short hartmann output. But gotoField failed with no calibs
being taken,
and leaving arc lamps on (this is good because we don't need to
warming up lamps
again). Usually issuing another gotoField will work, or we can take
calibs manually, then
start guider. From what I see, it looks like a timeout issue. Anyway,
we lost some on-sky
time: 1 to 2 min  every time this happens. I feel this is a high
priority ticket.
    Observers, because lamps warning issue, please take arc first
(sop doCalibs narc=1) if
you decide to take calibs manually. I strongly suggest we just simply
gotoField again.
>
> The 'guider centerUp' button within the guider window does not
> work. It needs to
> be typed into the command line. Ticket 1240.
>