From: Russet McMillan
Subject: 3.5m Night Log 20020110
Date: Fri, 11 Jan 2002 06:19:37 -0700 (MST)
                         APACHE POINT OBSERVATORY
                         3.5m Telescope Night Log
                        Thursday, January 10, 2002
                                                           ACTUAL
 ASTRONOMER    OBSERVER(S)             INSTRUMENT      START  FINISH
 -------------------------------------------------------------------
 G.Wolf         R.Evans                GRIM            04:35   05:50
   INST        SCHEDULED     WEATH     EQUIP     OBS     DAY  NOTUSED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 --------------------------------------------------------------------
 UC04/R      18:13  06:09  10.4  0    0    0    0    0    0   1.0  0.6
 note: scheduled times listed include instrument change time
                  ------------- ACTIVITY LOG --------------
 1st Half Observing Specialist: N.Camron Hastings
 2nd Half Observing Specialist: R.McMillan
 The first half of the night had high humidity with occasional fog and
 blowing snow, and the forecast and satellite images were very
 unpromising.  So, with the agreement of the observing specialist, the
 observer went home and left a phone number where he could be reached.
 During second half the humidity dropped below the limit, but it
 remained unstable for a while.  There were still clouds present and
 some signs of frost developing on exposed surfaces, so I didn't
 consider opening to be an option until the humidity dropped further.
 When it was clear and relatively dry, I tried to reach the observer
 but got no answer in three tries over the course of an hour.
 I tried an experiment with the railing to see if frost formation was
 still a problem, and when all appeared fine, I opened the telescope at
 04:35 and did a little bit of engineering.  Everything worked well
 while I was playing with it.
                   ------- FAILURE LOG -------
 PROG/INST  FAILURE MODE     TIME
 S/E/G/D/O     TI/SHU    START  FINISH    DESCRIPTION
 --------------------------------------------------------------------
               ---------------- FOCUS LOG ---------------
                                        Air/Truss   Wind
 Time   Instrument   Focus     Az  El    Temp-C    Dir MPH  filt  FWHM
 ---------------------------------------------------------------------
 05:05  GrIm2(f/10)  50(255)   131  53  -1.6/-3.6  25   18   J    1.06
              --------------- WEATHER LOG ----------------
                                 Wind                        Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:01    26    18     20    86  (E)      232
     17:01    24    19     30    71  (ENE)    305
     18:01    23    22     29    74  (ENE)    186
     19:01    23    22     18    76  (ENE)    154
     20:01    23    22     22    70  (ENE)    366
     21:01    22    21     25    69  (ENE)    135
     22:01    23    21     14    72  (ENE)    110  ptly cldy   fog
     23:01    22    21      8    77  (ENE)     78  ptly cldy   none
     00:01    22    21      9    75  (ENE)    132  ptly cldy   none
     01:01    27    19      0   314  (NW)     345  ptly cldy   none
     02:01    24    20      8    22  (NNE)    353  ptly cldy   none
     03:01    26    19     16    31  (NNE)    276  mstly clr   none
     04:01    28    19     14    30  (NNE)    335  mstly clr   none
     05:01    29    19     20    30  (NNE)    381  mstly clr   none
     06:01    28    19      1   261  (W)      495  mstly clr   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 Ctrlv4.1b2. Current TCC version: 2.5.5
   Current MC version: v1_7_3.