Subject: 3.5m Night Log 20190818
From: dembicky@apo.nmsu.edu
Date: Mon, 19 Aug 2019 10:54:11 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, August 18, 2019
                                                           ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
--------------------------------------------------------------------
B.Bolin           B.Bolin               DIS            19:54   01:00
M.Brotherton      J.McLane              TSPEC          --:--   --:--
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 ----------------------------------------------------------------
UW15/R     19:54   01:10    0    0    0    0   1.9  3.4   0    0
WY02/R     01:10   06:21    0   5.2   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky
Again DIS red bias image looked odd at checkout (horizontal stripes).  A second bias changed the pattern, and left a lot more noise but did not solve the issue.  I tried a 3rd bias, which didn't fix the situation so I tried restarting the camera.
ARCTIC vacuum 2.0x10^-2 torr
Clouds looked like they were going to swamp us during the first half but disappated when the approached.  We weren't so lucky for the 2nd half as they got thicker.  I managed to get TSPEC focused but the clouds just got thicker after that and the observer didn't get anything useful under these conditions.
We gave up at 04:15 with thick clouds overhead.
                    ------- 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
--------------------------------------------------------------------------
 20:34 dcamera    270( 1146)  35  52  20.2 23.4 22.8 23.0 20.9   --  1.00
 23:15 dcamera    515( 1215) -10  41  19.2 19.5 20.0 19.2 19.2   --  1.30
 01:28 tcamera    512( 1382)  58  51  18.3 18.4 19.0 18.3 18.4   Ks  0.72
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    76    33     10   292  (WNW)    327  ptly cldy   none
     17:00    74    31      8   222   (SW)    316 mstly clr    none
     18:00    74    32      7   297  (WNW)    239 mstly clr    none
     19:00    72    31      4   256  (WSW)    275 mstly clr    none
     20:00    68    31      6   292  (WNW)    283 mstly clr    none
     21:00    67    32      6   217   (SW)    342 mstly clr    none
     22:00    66    32      6   210  (SSW)    462  ptly cldy   none
     23:00    67    32      9   203  (SSW)    356  ptly cldy   none
     00:00    65    34     16   201  (SSW)    506  ptly cldy   none
     01:00    66    31      7   191    (S)    422 mstly cldy   none
     02:00    66    31      9   190    (S)    327   cloudy     none
     03:00    66    31      8   183    (S)    292   cloudy     none
     04:00    66    30      8   182    (S)    279   cloudy     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: 1.2.4
    Current TUI version: 2.6.0