From: Russet McMillan
Subject: 3.5m Night Log 20030318
Date: Wed, 19 Mar 2003 05:17:48 -0700 (MST)
                         Apache Point Observatory
                         3.5m Telescope Night Log
                         Tuesday, March 18, 2003
                                                          ACTUAL
 ASTRONOMER     OBSERVER(S)             INSTRUMENT     START FINISH
 -------------------------------------------------------------------
 B.Gillespie    R.McMillan              GFP,SPIcam     --:--  --:--
   INST        SCHEDULED     WEATH     EQUIP     OBS     DAY  NOTUSED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 --------------------------------------------------------------------
 EN01/O      19:07  05:16   0  10.1   0    0    0    0    0    0    0
 note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialist: R.McMillan
 This seems an appropriate time for a discussion on how to translate
 the weather forecasts for this area.  "Slight chance of snow,"
 "little additional accumulation expected," and "chance of
 precipitation 20%" should be interpreted as "Winter weather advisory.
 Continuous snowfall throughout the night.  Accumulation 6 inches or
 greater with considerable blowing and drifting.  Visibility near zero
 at times."
 Aside from running the snow program, I did some tests of the new
 shutter on the GFP (a slight dark current was apparent, but no light
 leaks), the latest TUI version (making steady progress), SPIcam darks
 (neither dark current nor light leaks apparent), and pinhole images
 of the new tertiary baffle.
                        ------- 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
 ---------------------------------------------------------------------
               --------------- WEATHER LOG ----------------
                                 Wind                        Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
     ------------------------------------------------------------------
     16:01    26    22     27   268  (W)      612  cloudy     snow
     17:01    26    22     24   283  (WNW)   1919  cloudy     snow
     18:01    26    24     25   290  (WNW)   2449  cloudy     snow
     19:01    26    24     21   294  (WNW)    250  cloudy     snow
     20:01    26    23     19   303  (WNW)    285  cloudy     snow
     21:01    26    23     13   333  (NNW)    174  cloudy     snow
     22:01    26    22     24   305  (NW)     371  cloudy     snow
     23:01    25    22     13   276  (W)      499  cloudy     snow
     00:01    25    22     19   304  (NW)     757  cloudy     snow
     01:01    25    21     17   305  (NW)     337  cloudy     snow
     02:01    25    22     14   302  (WNW)     84  cloudy     snow
     03:01    25    20     13   309  (NW)      80  cloudy     snow
     04:01    25    21     11   310  (NW)      54  cloudy     snow
     05:01    25    21      9   326  (NW)     221  cloudy     snow
   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: 2.82
   Current guide software version: GIm Ctrlv4.1b2
   Current TCC version: 2.6.8