From:
Subject: 3.5m Night Log 20100128
Date: Fri, 29 Jan 2010 13:16:53 +0000 (UTC)
                       Apache Point Observatory
                       3.5m Telescope Night Log
                      Thursday, January 28, 2010
                                                          ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
 --------------------------------------------------------------------
 M.Gladder       E.Wuyts                 --            --:--  --:--
 M.Klaene        R.McMillan              --            --:--  --:--
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 ----------------------------------------------------------------
 UC02/R     17:41  19:30    0   1.8   0    0    0    0    0    0
 EN01/O     19:30  06:51   0.4 11.0   0    0    0    0    0    0
 note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
 Observing Specialist:  R. McMillan
 Another snowy night.  I ran the snow program most of the night.  I
 checked to see if tertiary rotation slips could have been
 responsible for some oddities in pointing models taken a month ago,
 but the logs show the tertiary was very stable, so the event on
 Tuesday night was apparently rare.  I also ran some tests of
 behavior of the primary mirror support system at high altitudes; I
 found that currently it starts to misbehave shortly above 85 deg,
 but as long as the telescope doesn't go all the way to the zenith
 the mirror recovers nicely and should behave consistently on later,
 lower slews.
                    ------- FAILURE LOG -------
 PROG   INST   FAILURE MODE     TIME
     (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
             ---------------- FOCUS LOG ---------------
 Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
 --------------------------------------------------------------------------
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    28    27      8   211  (SSW)   3201   cloudy     snow
     17:00    24    24      7   235   (SW)   1406   cloudy     snow
     18:00    25    23     11   269    (W)    368   cloudy     snow
     19:00    23    21      8   238  (WSW)    296   cloudy     snow
     20:00    23    20      8   257  (WSW)    348   cloudy     snow
     21:00    21    19      2   248  (WSW)    379   cloudy     snow
     22:00    22    19      8   274    (W)    358   cloudy     snow
     23:00    21    19     13   301  (WNW)   1293   cloudy     snow
     00:00    20    17     13   322   (NW)   1324   cloudy     snow
     01:00    20    18      6   346  (NNW)    849   cloudy     snow
     02:00    20    17     10     4    (N)    404   cloudy     snow
     03:00    21    18     12     1    (N)     66   cloudy     snow
     04:00    21    18     12    36   (NE)    113   cloudy   lt snow
     05:00    20    17     16     2    (N)    197 mstly cldy lt snow
     06:00    20    18     27    25  (NNE)    172 mstly cldy lt 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
    Telescope drives operational. Current TCC version: 2.11.1
    Current TUI version: 1.7.0