Date: Wed, 21 May 2003 19:09:18 -0600 (MDT)
From: John Barentine
Subject: 3.5m Night Log 20030520
                         Apache Point Observatory
                         3.5m Telescope Night Log
                           Tuesday, May 20, 2003
                                                          ACTUAL
 ASTRONOMER     OBSERVER(S)             INSTRUMENT     START FINISH
 --------------------------------------------------------------------
 K.Covey        K.Covey                 DIS            --:--  --:--
 G.Wolf         R.Evans                 GRIM           --:--  --:--
 E.Turner       J.Barentine             SPIcam         --:--  --:--
   INST        SCHEDULED     WEATH     EQUIP     OBS     DAY  NOTUSED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 --------------------------------------------------------------------
 UW04/R      20:59  01:00  4.0   0    0    0    0    0    0    0    0
 UC04/R      01:00  04:30  0.1  3.4   0    0    0    0    0    0    0
 PU04/O      04:30  05:00   0   0.5   0    0    0    0    0    0    0
 note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialist: J.Barentine
 Better (a day) late than never... Thanks for the reminder, Russet.
 High humidity, dust and near-overcast skies around sunset prevented us
from opening for a second night in a row.  The humidity gradually
increased during first half, crossing the 100% threshold at about 23:30.
Shortly thereafter, when the rain sensor had triggered, Kevin decided to
give up for the night.  Rhodri logged in a short time later and passed
time taking a series of darks with GRIM whilst we waited in vain for the
humidity to drop.  It did, tantalizingly, several times, but always seemed
to go back up.  I let him continue his cals into PU04's time, since
although the humidity had finally dropped, clouds filled the sky.  Bummer.
                        ------- 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    51    40      5   271  (W)      948  MstlyCldy    none
     17:01    51    40      4   324  (NW)    2000  MstlyCldy    none
     18:01    49    39      3    24  (NNE)   3351  MstlyCldy    none
     19:01    48    43      0   143  (SE)    1026  MstlyCldy    none
     20:01    47    42      9    90  (E)     2204  MstlyCldy    none
     21:01    46    42      2   186  (S)     2200  MstlyCldy    none
     22:01    45    44      7    93  (E)     2136  MstlyCldy    none
     23:01    46    45      1   168  (SSE)   3304  PtlyCldy     none
     00:01    44    44      8    79  (ENE)   5193  PtlyCldy     none
     01:01    49    43      7   311  (NW)    4661  PtlyCldy     none
     02:01    46    43      4    25  (NNE)   3504  PtlyCldy     none
     03:01    47    43      1   335  (NNW)   3006  PtlyCldy     none
     04:01    48    41      7    14  (NNE)   3043  MstlyCldy    none
     05:01    49    40      0   236  (SW)    3036  MstlyCldy    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: 2.85b
   Current guide software version: GIm Ctrlv4.1b4
   Current TCC version: 2.6.8  Current TUI version: 0.66