Date: Fri, 27 Aug 2004 06:19:39 -0600 (MDT)
From: John Barentine
Subject: 3.5m Night Log 20040826
                         Apache Point Observatory
                         3.5m Telescope Night Log
                        Thursday, August 26, 2004
                                                          ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START FINISH
 --------------------------------------------------------------------
 S.Kent          R.McMillan             CorMASS        20:30  00:50
 D.York          D.York                 DIS            01:10  05:55
  INST        SCHEDULED      WEATH     EQUIP     OBS     DAY  NOT USED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 UC04/O      20:30  01:00   0    0    0    0    0   4.5   0    0    0
 UC06/R      01:00  05:40   0    0    0    0   2.2  2.5   0    0    0
 note: scheduled times listed include instrument change time
                  ------------- ACTIVITY LOG --------------
 Observing Specialists: J.Barentine
 Opened at 19:30 to cool in twilight.  The first half was quiet with good
seeing (better than 0.8 arcseconds FWHM in R) on the guider.  We had
passing waves of clouds toward the middle to end of the half.  CorMASS was
fairly well-behaved.
 Second half was similarly quiet.  No obvious sign of the recent noise on
the red side of DIS.  Clouds calmed down after the shift change and the
skies were largely clear after about 02:00.
                      ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
       (SEGDFVO)    TI/SHU   START  FINISH  DESCRIPTION
 -----------------------------------------------------------------------
                 ---------------- FOCUS LOG ---------------
                                          Air/Truss   Wind
 Time   Instrument   Focus     Az  El    Temp-C    Dir MPH  filt  FWHM
 ---------------------------------------------------------------------
 21:03 cormass     -35(1567)   -89 66  15.8/16.6  252  15   K     0.45 (*)
 21:10 NA2gdr      -2000(32000)-88 65  15.7/16.5  240  17   R     0.78
 01:39 DISslit     0(1426)     31  77  15.9/15.3  263  13   -     0.89
 01:43 NA2gdr      -4000(27000)29  77  15.6/15.4  233  17   R     0.91
(*) This is a crude estimate based on eyeballing the slitviewing mode
                ------------- WEATHER LOG ----------------
                                  Wind                       Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
     ------------------------------------------------------------------
     16:01    67    36     14   262  (W)           MstlyClr    none
     17:01    68    35     16   263  (W)           MstlyClr    none
     18:01    67    34      9   278  (W)           MstlyClr    none
     19:01    64    31     13   262  (W)           MstlyClr    none
     20:01    60    28     13   257  (WSW)         MstlyClr    none
     21:01    60    28     15   253  (WSW)         MstlyClr    none
     22:01    60    30     14   251  (WSW)         PtlyCldy    none
     23:01    61    29     15   255  (WSW)         PtlyCldy    none
     00:01    61    28      9   261  (W)           PtlyCldy    none
     01:01    61    28     12   259  (W)           PtlyCldy    none
     02:01    60    25     10   255  (WSW)         PtlyCldy    none
     03:01    60    22     10   269  (W)           MstlyClr    none
     04:01    59    21     14   285  (WNW)         Clear       none
     05:01    59    22     14   282  (WNW)         Clear       none
     06:01    58    25     13   293  (WNW)         Clear       none
     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 Remark version: 2.85b
     Current TCC version: 2.7.2  Current TUI version: TUI 90b2