Date: Sun, 27 Apr 2008 11:06:03 -0000 (UTC)
Subject: 3.5m Night Log 20080426
From: "Gabrelle Saurage"
                        Apache Point Observatory
                        3.5m Telescope Night Log
                        Saturday, April 26th, 2008
                                                         ACTUAL
 ASTRONOMER     OBSERVER(S)             INSTRUMENT    START  FINISH
-------------------------------------------------------------------
A.Reines        A.Reines                DIS           --:--  --:--
M.Gladders      M.Gladders              DIS           --:--  --:--
G.Stringfellow  G.Stringfellow          DIS           --:--  --:--
   INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
---------------------------------------------------------------------
 UV01/R     20:39  01:05   4.4    0   0    0    0    0    0    0    0
 UC01/O     01:05  04:00   0.3   2.7  0    0    0    0    0    0    0
 CU06/R     04:00  05:23    0    1.3  0    0    0    0   0.8   0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
Observing Specialists: G.Saurage
Az Velo Scales:
   At checkout 583.6, 581.1; 582.3
   At switchover 584.7, 583.1; 583.9
Rotator had a servo error on the second test slew of the night. Fritz
investigated; seemed to be a glitch. Nothing really wrong, just need to be
halted and cleared.
Dust and wind kept us closed tonight. Dust levels were high in the
afternoon and continued to be too high to open at sunset. Dust levels
steadily rose higher and higher during the first half until just after
11pm when the winds picked up. Gusts were > 45mph and then dust levels
shot up above 10K. After 3am dust levels began decreasing, bouncing below
the limit, but wind gusts stayed 45-50mph the rest of the night.
                       ------- 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    58    11     14   262    (W)   5270 mstly clr    dust
     17:00    52     7     13   296  (WNW)   5416 mstly clr    dust
     18:00    53     8      9   309   (NW)   5007 mstly clr    dust
     19:00    53     8     10   290  (WNW)   4834 mstly clr    dust
     20:00    50     5      6     3    (N)   4835 mstly clr    dust
     21:00    50     5     12    38   (NE)   5287 mstly clr    dust
     22:00    49     5     17    68  (ENE)   5721  ptly cldy   dust
     23:00    47     3     22    74  (ENE)   7372  ptly cldy   dust
     00:00    36    15     27    68  (ENE)  15753  ptly cldy   dust
     01:00    30    16     37    71  (ENE)  12844  ptly cldy   dust
     02:00    27    16     41    70  (ENE)   8190  ptly cldy   dust
     03:00    25    16     36    66  (ENE)   3854 mstly clr    dust
     04:00    25    14     38    68  (ENE)   2943 mstly clr    dust
     05:00    24     6     34    76  (ENE)   1909 mstly clr    dust
     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: 2.9.1
      Current TUI version: TUI 1.4.5