From: Russet McMillan
Subject: 3.5m Night Log 20060925
Date: Tue, 26 Sep 2006 05:52:49 -0600 (MDT)
                        Apache Point Observatory
                        3.5m Telescope Night Log
                        Monday, September 25, 2006
                                                          ACTUAL
 ASTRONOMER     OBSERVER(S)              INSTRUMENT   START FINISH
 -------------------------------------------------------------------
 G.Kacprzak     G.Kacprzak               DIS          20:40  01:05
 Y.Lin          Y.Lin                    DIS          01:15  04:30
  INST     SCHED(TWILIGHT)   WEATH     EQUIP     OBS     DAY  NOT USED
 I/ROW/DN    START FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 NM04/R      19:49  01:10  0.2  0.7   0    0   4.5   0    0    0    0
 PU01/R      01:10  06:01  1.5   0    0    0   3.3   0    0    0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 1st Half Observing Specialist: G.Saurage
 Clear skies at sunset. During afternoon checkout I discovered that the
 secondary wasn't moving. It would not respond to move commands. After
 several calls to various people, Jon and Fritz established that tcc was
 not talking to the secondary. The host sessions were not responding. So
 tcc had to be rebooted. Once everything came back up tcc could send moves
 to the secondary and we were pretty much ready to go on sky. Except, then
 the humidity was too high.
 During all of the secondary escapades, control to the lamps was coming and
 going. They worked fine at the beginning of the night but when the
 observer tried to do cals later, the gui would not respond, for him or me.
 Then a little while later the lamps did work, but the text labels next to
 each button still read Outlet #.
 The humidity continued to hover just below closure limits, but given the
 clear skies and lack of local radar activity, I decided to open at 8:40pm.
 The humidity hung there for the rest of 1st half but we persevered.
 2nd Half Observing Specialist: R.McMillan
 By the end of first half, humidity was right at the limit if I
 compared dewpoint to the primary mirror temperature (an old sensor).
 We don't have all the new sensors on the top end reading yet, so the
 primary was the coldest one recording.  I was concerned because I
 didn't know how much the new top end might supercool below air
 temperature.  At the program changeover, I went upstairs and checked
 various dome surfaces and also the top end for incipient
 condensation, but everything seemed fine.  So we continued observing
 with the humidity stable right at the limit.
 Everything went smoothly for a while, with the lampswitch working
 consistently (except for the labels being wrong) and the telescope
 pointing very well, until clouds began to form overhead after 04:00.
 Since the humidity was just a hair above the limit, I decided to
 close for the clouds.
                       ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
       (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
  NM04   D         T/H        18:45 20:30   tcc not talking to sec
               ---------------- FOCUS LOG ---------------
                                                      Wind
 Time Instrument Focus    Az El Temp Strc Prim Sec Air Dir MPH filt FWHM
 -----------------------------------------------------------------------
 20:50 DIS     100(-64)   20 44 10.5                   260  6   -    1.0
 00:28 DISslit   150( )         9.7                            -     1.1
 01:24 DISslit   140( )         9.7                            -     1.08
                ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     16:00    57    47     10   234   (SW)    516    clear     none
     17:00    54    45      5   265    (W)    489    clear     none
     18:00    55    46      6   261    (W)    547    clear     none
     19:00    50    46      1   237  (WSW)    514    clear    humid
     20:00    50    46      5   266    (W)    739    clear    humid
     21:00    50    45      5   274    (W)    827 mstly clr   humid
     22:00    50    45      4   232   (SW)    757  ptly cldy  humid
     23:00    50    45      4   255  (WSW)    807  ptly cldy  humid
     00:00    50    45      6   187    (S)    781    clear    humid
     01:00    50    45      9   221   (SW)    705    clear    humid
     02:00    50    45      7   242  (WSW)    661    clear    humid
     03:00    49    45      5   249  (WSW)    678    clear    humid
     04:00    49    45      7   216   (SW)    663  ptly cldy  humid
     05:00    49    45      7   184    (S)    730 mstly cldy  humid
     Note: the wind was coming from the azimuth listed.
     The convention used is north=0 degrees, east=90 degrees.
     The dust count is particles > 1u per 0.1 cubic feet.
                              TELESCOPE STATUS
      Telescope drives operational. Current TCC version: 2.8.4
      Current TUI version: TUI 1.2