Date: Mon, 9 Sep 2002 04:57:44 -0600 (MDT)
From: John Barentine
Subject: 3.5m Night Log 20020908
                         Apache Point Observatory
                         3.5m Telescope Night Log
                         Sunday, September 8, 2002
                                                           ACTUAL
 ASTRONOMER     OBSERVER(S)             INSTRUMENT     START  FINISH
 -------------------------------------------------------------------
 E.Turner       J.Barentine,W.Ketzeback SH             20:35   21:00
 B.Pindor       B.Pindor                DIS-low        22:40   23:57
   INST        SCHEDULED     WEATH     EQUIP     OBS     DAY  NOTUSED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 --------------------------------------------------------------------
 PU04/O      20:13  20:53   0    0    0    0   0.1  0.6   0    0    0
 PU01/R      20:53  05:49  7.6   0    0    0   1.3   0    0    0    0
 note: scheduled times listed include instrument change time
                  ------------- ACTIVITY LOG --------------
 Observing Specialists: J.Barentine and W.Ketzeback
 Repeated waves of scattered clouds kept us closed until about 20:30.
After opening under what turned out to be a sucker hole, we started S-H
observations only to find the pointing to be pretty bad, preventing us
from centering any stars at all on the S-H monitor.  With only ~20 min
left in the PU04 block, we decided to focus and hand the remainder of the
time over to Bart, but then the clouds moved back in.  At 21:15 we closed,
fearing the rising humidity indicated a chance of rain.
 Opened again just after 22:30 as skies cleared up again.  Closed again
just short of midnight when the clouds thickened up again.  Second half
was mostly cloudly with the humidity creeping up throughout.  Bart finally
called it a night at 04:35 given the minimal chances for improvement in
conditions.
 Earlier in the night, after closing around midnight, we noticed an odd,
unfamiliar humming sound evidently coming from within the mirror cell
itself.  It sounded somewhat like the noise emitted from a stuck motor,
but it was impossible to tell that for sure.  By closing time, it had
stopped.
                        ------- FAILURE LOG -------
 PROG   INST       FAILURE      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
 ---------------------------------------------------------------------
 22:40 DISslit     -100(785)   275 46  13.0/14.4  80   11   -     1.35
              --------------- WEATHER LOG ----------------
                                 Wind                        Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:01    60    45     11    60  (ENE)    231  PtlyCldy    none
     17:01    62    44      9    85  (E)      175  MstlyCldy   none
     18:01    60    44      8    79  (ENE)    251  MstlyCldy   none
     19:01    58    47     14    70  (ENE)    327  PtlyCldy    none
     20:01    57    48     15    64  (ENE)    307  PtlyCldy    none
     21:01    57    48      8    84  (E)      334  PtlyCldy    none
     22:01    57    47      8    85  (E)      361  MstlyCldy   none
     23:01    55    48     10    82  (E)      326  MstlyClr    none
     00:01    54    48     10   111  (ESE)    281  PtlyCldy    none
     01:01    56    47      2   294  (WNW)    284  MstlyCldy   none
     02:01    54    47      5   182  (S)      236  MstlyCldy   none
     03:01    54    48     10   218  (SW)     188  PtlyCldy    none
     04:01    53    48      2   254  (WSW)    249  PtlyCldy    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: 2.82
   Current guide software version: GIm Ctrlv4.1b2
   Current TCC version: 2.6.5