Subject: 3.5m Night Log 20210816
From: mcmillan@apo.nmsu.edu
Date: Tue, 17 Aug 2021 12:05:02 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Monday, August 16, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
AP01  S.Merkowitz       R.McMillan
OU01  J.Wisniewski      J.Wisniewski
CU07  A.Kowalski        A.Kowalski
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
AP01  APOLLO         --:--   --:--
OU01  ARCTIC         --:--   --:--
CU07  ECHELLE        03:00   05:17
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
AP01/R      19:55  20:55    0   1.0   0    0   0.0  0.0  0    0
OU01/R      20:55  01:40   0.4  4.4   0    0   0.0  0.0   0    0
CU07/R      01:40  06:20   2.4   0    0    0   2.3  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
First half featured a nasty storm out in the basin, and eventually we did get some rain from that system.  Second half the radar weakened, the clouds thinned, and the humidity was not that bad, so I tried opening to catch a hole.  As soon as focus was finished, the clouds moved back in and the humidity was right at the limit.  I was about to close but another hole showed up, so I gave it a chance, and this turned out to be a productive opportunity.  The dewpoint even dropped for a while and we were able to stay open almost until twilight.  Once the dewpoint went back up with the telescope now cool, then it was time to close.  But hopefully the data will prove to be useful.
                    ------- 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
--------------------------------------------------------------------------
 03:13 arctic   643( 1154) 234  43  10.7 11.6 12.8 11.4 10.8   4170  1.69
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    58    54      6   261    (W)    476   cloudy     none
     17:00    58    44      9    60  (ENE)    307   cloudy     none
     18:00    54    53      1   253  (WSW)          cloudy     none
     19:00    54    52      3    81    (E)          cloudy     none
     20:00    55    49      9    49   (NE)          cloudy     none
     21:00    55    49      7    35   (NE)          cloudy     none
     22:00    53    48      8    48   (NE)          cloudy     none
     23:00    53    47     12    31  (NNE)          cloudy     rain
     00:00    50    44     11    77  (ENE)          cloudy   lt rain
     01:00    56    43     14    86    (E)    484   cloudy   lt rain
     02:00    53    44     11    83    (E)    436  ptly cldy   none
     03:00    51    47     11    57  (ENE)         ptly cldy   none
     04:00    51    47      9    74  (ENE)        mstly clr    none
     05:00    52    46      2   278    (W)        mstly clr    none
     06:00    53    45      3   264    (W)        mstly clr    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