Subject: 3.5m Night Log 20160408
From: mcmillan@apo.nmsu.edu
Date: Sat,  9 Apr 2016 11:20:43 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, April 08, 2016
                                                           ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
--------------------------------------------------------------------
D.York            D.York                ECHELLE        19:50   20:55
M.Hammergren      K.Nault, M.Brucker    ARCTIC         --:--   --:--
C.Vargas          C.Vargas              ARCTIC         02:30   04:55
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 ----------------------------------------------------------------
UC01/R     19:37   00:10   2.9  0.5   0    0   0.0  1.1   0    0
AD02/R     00:10   02:10   2.0   0    0    0   0.0  0.0   0    0
NM01/R     02:10   06:32   2.0   0    0    0   2.4  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
At checkout, the echelle needed a restart of the ICC program because pixel values were all zero.  It was fine after the ICC restart.
We were able to open shortly after sunset and get some data, but then the clouds got thicker and the rain got closer.  Rain started at 21:30, power went out at 23:35, power restored at 01:50, then the rain stopped and clouds improved again.  I waited a little longer to see if the humidity would spike, but it stayed steady just below the limit for a couple of hours, then finally went up about an hour before twilight.  Note that the regular 3.5m dewpoint sensor appears to be frozen over, so I was watching the two Optidew sensors which agreed with each other.
                    ------- 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
--------------------------------------------------------------------------
 19:49 ecamera    621( -535)  22  66   4.4  7.6  8.7  8.1  6.2   ND2  2.21
 02:40 arctic   528(  409) -48  46   3.8  4.3  5.7  4.3  4.0   r  1.25
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    46    32      8   153  (SSE)   1670  ptly cldy   none
     17:00    48    33      2   219   (SW)   1590  ptly cldy   none
     18:00    45    34     15   123  (ESE)   1580  ptly cldy   none
     19:00    42    34     14    88    (E)   1684 mstly clr    none
     20:00    40    35     17    90    (E)   1679  ptly cldy   none
     21:00    39    31     20    83    (E)   1891 mstly cldy lt rain
     22:00    40    31     14    87    (E)   2123   cloudy   lt rain
     23:00    40    31     17    84    (E)   1208   cloudy     rain
     00:00    40    31     23   164  (SSE)   1060   cloudy     rain
     01:00    37    31     19    60  (ENE)    865   cloudy     rain
     02:00    38    32      8   262    (W)    931 mstly clr    none
     03:00    41    31      8   215   (SW)    570    clear     none
     04:00    39    31      9   214   (SW)    728    clear     none
     05:00    38    31      8   202  (SSW)   1814    clear     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
    Telescope drives operational. Current TCC version: 1.2.2
    Current TUI version: 2.5.1