From: Russet McMillan
Subject: 3.5m Night Log 20010327
Date: Wed, 28 Mar 2001 06:16:12 -0700 (MST)
                        APACHE POINT OBSERVATORY
                        3.5m Telescope Night Log
                        Tuesday, March 27th, 2001
                                                          ACTUAL
 ASTRONOMER    OBSERVER(S)             INSTRUMENT      START  FINISH
 --------------------------------------------------------------------
 P.Hodge       D.Zucker                SPIcam          02:25  06:00
   INST        SCHEDULED     WEATH     EQUIP     OBS     DAY  NOTUSED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 --------------------------------------------------------------------
 UW04/R      19:14 05:03   5.4  1.8  0.1   0   2.5   0    0    0    0
  note: scheduled times listed include instrument change time
                 ------------- ACTIVITY LOG --------------
          1st Half Observing Specialist: Camron Hastings
    Thick clouds kept us closed and then snow/fog/rain/ice finished us
off. It did subside around 21:30 MST, but there was a nice layer of ice
left on everything.
          2nd Half Observing Specialist: Russet McMillan
Since the air was fairly warm, I ran the roof heaters for a few hours.
The sky began to clear starting around 01:00, and when I inspected the
catwalk and lower rails I found no snow and very little ice.  The
telescope was opened at 02:25 under clear skies.  Only the humidity
was threatening to be a problem as the telescope cooled, but it just
barely reached the limit at twilight before dropping again.  We had a
few hiccups getting the guider started, and the focus was hard to
follow even with the help of the guider because the telescope was so
far out of equilibrium, but aside from that everything worked well.
         --------------- INSTRUMENT FOCUS LOG ----------------
                                       Air/Truss   Wind
 Time   Instrument   Focus     Az El    Temp-C    Dir MPH  filt   FWHM"
 ----------------------------------------------------------------------
02:50 SPIcam      -475(363)   267 56  0.7/2.6    355  3    Halpha 1.56
03:17 NA2gdr     -5000(55000) 301 44  0.6/2.0    359  12   none   1.45
03:57 SPIcam      -225(598)   276 42  0.4/1.3    356  7    Halpha 2.10
              ------------- WEATHER CONDITIONS ------------
                                 Wind                        Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:01    47    20     10   257  (WSW)    624   Cloudy     none
     17:01    45    18      7   264  (W)      752   Cloudy     none
     18:01    43    19      2   273  (W)      704   Cloudy     none
     19:01    41    22      7   332  (NNW)    703   Cloudy     rain
     20:01    32    31     26    24  (NNE)    109   Cloudy   rain/snow
     21:01    34    30      6     7  (N)      399   Cloudy     rain
     22:01    35    28     12    18  (NNE)    310   Cloudy     none
     23:01    36    25     15   344  (NNW)    412   cloudy     none
     00:01    36    25      8   344  (NNW)    388   cloudy     none
     01:01    34    27      3   357  (N)      451  mstly cldy  none
     02:01    33    26     14    14  (NNE)    463  mstly clr   none
     03:01    33    26      8    14  (NNE)    503    clear     none
     04:01    33    25      9    14  (NNE)    478    clear     none
     05:01    31    27      7     0  (N)      487    clear     none
     06:01    32    24      4     1  (N)      443    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
  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.