Subject: 3.5m Night Log 20190504
From: trudyk@apo.nmsu.edu
Date: Sun,  5 May 2019 11:23:49 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, May 04, 2019
                                                           ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
--------------------------------------------------------------------
S.Majewski        H.Lewis,L.Beale       ARCTIC         19:56   22:32
S.Majewski        H.Lewis,L.Beale       DIS            22:44   01:04
M.Prescott        M.Prescott            ARCTIC         01:16   05:00
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 ----------------------------------------------------------------
UV01/R     19:56   01:10    0    0    0    0   5.2  0.0   0    0
NM05/R     01:10   06:04    0    0    0.9  0   4.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Rudyk
Evening started mostly clear, with some high and low clouds coming from storm systems to the east. By 20:30 it had cleared out.  Stayed clear all night.
For NM05 program, filter appeared mis-aligned (diagonal oval illumination pattern). After many tests, determined that open mirror cover flats produce this pattern with the 3250A filter, closed mirror cover flats produce symmetric (normal/typical) illumination. Clouds began to form around 04:00. We were open all night.
                    ------- FAILURE LOG -------
PROG   INST   FAILURE MODE     TIME
    (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
----------------------------------------------------------------------
NM05    R         I/U      01:20   02:11 Filter problem, resolved
            ---------------- FOCUS LOG ---------------
Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
--------------------------------------------------------------------------
 20:18 arctic   514( 1304)  87  56  11.9 14.4 14.4 14.0 12.4   SDSS_r  0.98
 22:48 dcamera    564(  970) -31  59  11.9 11.9 12.5 11.8 12.0   -  0.97
 02:20 arctic   517( 1107) 164  61  11.2 10.6 11.2 10.5 10.8   3250  0.89
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    59    16      8   282  (WNW)    444    clear     none
     17:00    60    15      5   195  (SSW)    498 mstly clr    none
     18:00    58    15      7   259    (W)    541 mstly clr    none
     19:00    56    11     16   225   (SW)    423 mstly clr    none
     20:00    54    10     19   232   (SW)    496    clear     none
     21:00    54    11     16   244  (WSW)    508    clear     none
     22:00    54    11     14   258  (WSW)    475    clear     none
     23:00    54    11     11   246  (WSW)    504    clear     none
     00:00    53    10     10   261    (W)    517    clear     none
     01:00    52     9     14   276    (W)    528    clear     none
     02:00    52    11     15   298  (WNW)    574    clear     none
     03:00    53    12     10   294  (WNW)    597    clear     none
     04:00    52    13     14   312   (NW)    524  ptly cldy   none
     05:00    52    13     11   328  (NNW)    630  ptly cldy   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