Subject: 3.5m Night Log 20210618
From: mcmillan@apo.nmsu.edu
Date: Sat, 19 Jun 2021 11:55:22 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, June 18, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW08  M.Graham          M.Graham
UW02  P.Yoachim         P.Yoachim,J.Jiang
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW08  DIS            20:23   02:06
UW02  ARCTIC         02:18   05:30
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW08/R      20:23  02:10    0    0    0    0   0.0  5.8   0    0
UW02/R      02:10  05:46    0    0    0    0   3.6  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
Another almost perfectly photometric night, this time with moderate seeing, but on the whole very productive.  Everything worked well, but there were some tracking oscillations in altitude which did appear to be causing image elongation.  Previously it was hard to be sure if the wiggles were affecting science, but this instance was pretty clear.
The two UW programs mutually agreed to shift their changeover time one hour later, reflected in the times above.
                    ------- FAILURE LOG -------
              FAILURE MODE     TIME
PROG   INSTR     TI/SHU    START  FINISH  DESCRIPTION
----------------------------------------------------------------------
            ---------------- FOCUS LOG ---------------
Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
--------------------------------------------------------------------------
 22:04 dcamera    423( 1123) -71  34  18.4 19.3 19.8 18.9 18.4   -  1.73
 02:25 arctic   497( 1220) 239  52  17.7 16.3 17.0 16.1 16.8   SDSS_g  1.10
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    73    36      8   255  (WSW)    843    clear     none
     17:00    74    35      9   233   (SW)    810    clear     none
     18:00    73    34      6   212  (SSW)    831    clear     none
     19:00    73    34     12   239  (WSW)    783    clear     none
     20:00    69    34     11   203  (SSW)    787    clear     none
     21:00    66    31     11   149  (SSE)    770    clear     none
     22:00    65    30      7   167  (SSE)    713    clear     none
     23:00    64    32      7   157  (SSE)    749    clear     none
     00:00    64    32     10   181    (S)    710    clear     none
     01:00    62    32      7   142   (SE)    737    clear     none
     02:00    61    31      6   194  (SSW)    893    clear     none
     03:00    63    32      8   217   (SW)   1015    clear     none
     04:00    63    31      9   221   (SW)    900    clear     none
     05:00    62    28      6   194  (SSW)    646    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 SOFTWARE  ----------
Current TCC version: 1.4.2
Current HUB version: v20171231_01
Current TUI version: 2.6.0