From: Russet McMillan
Subject: 3,5m Night Log 20010409
Date: Tue, 10 Apr 2001 04:43:52 -0600 (MDT)
                        APACHE POINT OBSERVATORY
                        3.5m Telescope Night Log
                        Monday, April 9th, 2001
                                                          ACTUAL
 ASTRONOMER    OBSERVER(S)             INSTRUMENT      START  FINISH
 --------------------------------------------------------------------
 C.Laws        G.Gonzalez              Echelle         19:42  21:07
                                                       21:53  22:25
   INST        SCHEDULED     WEATH     EQUIP     OBS     DAY  NOTUSED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 --------------------------------------------------------------------
 UW05/R      20:24 05:45   0.3  7.8   0    0   0.7  0.6   0    0    0
  note: scheduled times listed include instrument change time
                 ------------- ACTIVITY LOG --------------
 1st half Observing Specialist: Jack Dembicky
 Enclosure fans/louvers turned on/opened at 17:30 for dome cooling.
 Enclosure opened at 19:30.
 Dust event forced closure at 21:07.  We re-opened at 21:53.  We closed
 again (due to clouds) at 22:25, but I left the enclosure open with the
 press fans on/cooling fans off/louvers closed due to dust levels on the
 increase again. Closed the enclosure at 22:56 due to clouds.
 2nd half Observing Specialist: Russet McMillan
 Second half remained cloudy, and the telescope was never re-opened.
 I closed the cloud camera when precipitation crept into the radar
 blind spot to the SE of the observatory.  The precipitation sensor
 did go off at about 0300, but I saw no direct signs of rain or snow
 when I went out to check.
         --------------- INSTRUMENT FOCUS LOG ----------------
                                       Air/Truss   Wind
 Time   Instrument   Focus     Az El    Temp-C    Dir MPH  filt   FWHM"
 ----------------------------------------------------------------------
 19:42  Echelle     -31(0)     36  66   8.4/10.1  224  17  ND1    1.36
              ------------- WEATHER CONDITIONS ------------
                                 Wind                        Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:01    54    14     27   218  (SW)     805 lt. cirrus   none
     17:01    54     8     16   246  (WSW)    594 lt. cirrus   none
     18:01    53     9     24   212  (SSW)    844 lt. cirrus   none
     19:01    49     9     26   206  (SSW)   1002 lt. cirrus   none
     20:01    48     6     15   242  (WSW)   1372    cirrus    none
     21:01    45    12     12   261  (W)     2083    cirrus    dust
     22:01    45    11     17   244  (WSW)   1133    clouds    none
     23:01    43    12     13   261  (W)     1071    clouds    none
     00:01    43    14     17   237  (WSW)    538    clouds    none
     01:01    41    17     27   237  (WSW)    462   cloudy     none
     02:01    41    20     25   240  (WSW)    426   cloudy     none
     03:01    40    23     17   259  (W)      333   cloudy     none
     04:01    39    24     13   251  (WSW)    313  mstly cldy  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
  Primary, secondary, and tertiary mirrors in place and collimated.
  Primary support system operational. Mirror ventilation system in place.
  Telescope drives operational. Current Remark version: 2.62. Current
  guide software version: GIm Ctrlv3.0b27. Current TCC version: 2.5.1
  Current MC version: v1_7_3.