Date: Mon, 10 Feb 2003 10:03:14 -0600 (CST)
From: James Annis
Subject: Re: 2.5m obslog 20030209 (MJD 52680)
Well, isn't that cool. Nice work.
My initial reaction is that the sp1 camera focus is wandering.
Now this is the kind of thing that Scot and I are working up
plans for: like who exactly is supposed to respond.
I'm expecting Jim to be right on this, probably David.
But not to overstep here, and in case they aren't right on top of it,
is it thought that spectro systems should work with Jon Brinkmann
to track this down, or is this purely in Survey Ops?
cheers,
jim
On Mon, 10 Feb 2003, Jurek Krzesinski wrote:
                            APACHE POINT OBSERVATORY SDSS 2.5M
                                      OBSERVING LOG
                                 Sunday February  9, 2003
                                       (MJD 52680)
      Howard did some spectro focus measurements this afternoon at different
     rotator position. The results are interesting- see the log and the problem
     section.
     Due to blown snow in the air we never open tonight.
     ---=== OBSERVING LOG ===---
     Swing shift:
        During day shift, I checked the focus of the spectrographs; both red
     cameras were reported by IDL as out-of-focus.  Before making any focus
     adjustments, however, I tried different Rot and Alt positions.  Although Alt
     seemed to have no affect, the focus of sp1 did changed with Rot position.
     And, I was able to repeat the change (see problems section).  I also saved all
     of my focus results on sdss_commish in /home/observer/focus.