Subject: 3.5m Night Log 20210821
From: cgray@apo.nmsu.edu
Date: Sun, 22 Aug 2021 12:42:01 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, August 21, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
CU04  Y.Notsu           Y.Notsu, K.Namekata
UW04  P.Yoachim         J.Jiang
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
CU04  ECHELLE        22:52   01:04
UW04  ARCTIC         01:08   06:15
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
CU04/R      19:50  01:10    0   3.0   0    0   0.0  2.3   0    0
UW04/R      01:10  06:23    0    0    0    0   0.0  5.2   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
The night started out with rain, rain everywhere, but not a drop on site. It stayed that way for a few hours but we were able to open around 11pm. Seeing was quite good! Clouds rolled in and out all night.
No problems tonight.
                    ------- 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
--------------------------------------------------------------------------
 22:59 ecamera    581(  133)  -1  58  14.0 14.9 14.9 14.7 14.0   ND2  0.95
 00:17 arctic   693( 1276)   1  58  13.5 13.4 14.0 13.3 13.4   sdss-r  1.24
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    59    46     11    82    (E)    556 mstly cldy   none
     17:00    60    48      8    92    (E)    630 mstly cldy   none
     18:00    61    47     11   112  (ESE)    483 mstly cldy   none
     19:00    61    46     11   126   (SE)    462 mstly cldy   none
     20:00    57    51     17   126   (SE)    736 mstly cldy   none
     21:00    56    50     16   113  (ESE)        mstly cldy   none
     22:00    57    50     20   127   (SE)    581 mstly cldy   none
     23:00    57    50     13   117  (ESE)    648 mstly cldy   none
     00:00    57    48     17   127   (SE)    649  ptly cldy   none
     01:00    57    46     18   131   (SE)    516 mstly clr    none
     02:00    56    48     23   129   (SE)    583 mstly clr    none
     03:00    56    46     12   170    (S)    534 mstly clr    none
     04:00    57    45     16   181    (S)    491 mstly clr    none
     05:00    57    46     10   178    (S)   1608 mstly clr    none
     06:00    55    49     13   180    (S)   2586 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.
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