Subject: 3.5m Night Log 20210415
From: cgray@apo.nmsu.edu
Date: Fri, 16 Apr 2021 12:03:04 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, April 15, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
GS02  S.Lepine          S.Lepine
DD02  B.Proudfoot       B.Proudfoot, D.Ragozzine
UW06  B.Williams        P.Nedialkov, D.Bizyaev
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
AP01  APOLLO         --:--   --:--
GS02  ECHELLE        --:--   --:--
UW06  DIS            03:20   04:12
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
GS02/R      19:42  23:50   0.8  3.4   0    0    0    0    0    0
DD02/T      23:50  01:10   1.3   0    0    0    0    0    0    0
UW06/R      01:10  06:24   4.3   0    0    0   0.9  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
A disappointing night. We had clouds all night, with high dust for most of A half. The dust died down around midnight, so I opened the dome for DD02 but we weren't able to see even 3rd magnitude star. Things did clear a little after 3am but, by the time we focused and UW06 got their standards, we were under enough cloud cover that we could not make out their galaxies.
The optical cloud cam randomly cut out tonight and I was not able to bring it back up.
                    ------- 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
--------------------------------------------------------------------------
 03:19 dcamera    392(  414) 103  52   4.6  5.2  6.1  5.1  4.8   --  1.66
 04:10 dcamera    421(  406) 259  45   3.7  4.3  5.1  4.1  3.8   --  2.01
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    52    18     30   262    (W)   1789   cloudy     none
     17:00    50    15     30   245  (WSW)   1918   cloudy     none
     18:00    49    11     26   263    (W)   2461   cloudy     dust
     19:00    49    11     31   255  (WSW)   3179   cloudy     dust
     20:00    48     5     24   265    (W)   6885   cloudy     dust
     21:00    47     2     22   268    (W)   4659   cloudy     dust
     22:00    46     1     18   264    (W)   5576   cloudy     dust
     23:00    45     0     21   281    (W)   4701   cloudy     dust
     00:00    44     1     16   262    (W)   3451   cloudy     dust
     01:00    43     2     17   283  (WNW)   2490   cloudy     none
     02:00    42     3     15   263    (W)   1938   cloudy     none
     03:00    41     3     13   300  (WNW)   1739 mstly cldy   none
     04:00    39     0      7   317   (NW)   1431   cloudy     none
     05:00    38    -1     14   348  (NNW)   1385   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.
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