Subject: 3.5m Night Log 20190520
From: dembicky@apo.nmsu.edu
Date: Tue, 21 May 2019 11:12:24 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Monday, May 20, 2019
                                                           ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
--------------------------------------------------------------------
Y.Zhu             D.Ren, X.Zhang        PAO            23:07   04:25
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 ----------------------------------------------------------------
NI01/O     20:07   05:52   1.8  2.7   0    0   0.0  5.2   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky
We opened at 23:07 but the telescope primary was warm due to the drop in outside temps as the cold front moved in.  Seeing was pretty bad as well (SDSS was getting around 4 arc sec seeing).
Orographic clouds formed over us around 01:15 and by 02:00 we were pretty well socked in with these clouds.  We gave up at 04:25.
                    ------- 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    52    19     27   227   (SW)   9470   cloudy     dust
     17:00    48    17     36   250  (WSW)  12552   cloudy     dust
     18:00    47    15     37   256  (WSW)   6620   cloudy     dust
     19:00    43    19     25   268    (W)  41352   cloudy     dust
     20:00    35    25     22   286  (WNW)  33656   cloudy     dust
     21:00    32    22     14   269    (W)   5231   cloudy     none
     22:00    30    18     27   296  (WNW)   4728 mstly clr    none
     23:00    28    17     13   302  (WNW)           clear     none
     00:00    27    15     25   288  (WNW)    307    clear     none
     01:00    26    17     23   298  (WNW)    352  ptly cldy   none
     02:00    26    18     20   292  (WNW)          cloudy     none
     03:00    26    19     17   294  (WNW)          cloudy     none
     04:00    26    20     21   287  (WNW)          cloudy    humid
     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