Subject: 3.5m Night Log 20230725
From: mcmillan@apo.nmsu.edu
Date: Wed, 26 Jul 2023 12:21:26 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, July 25, 2023
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
JH03  N.Dello           A.McKay
UW06  C.Chandler        C.Chandler
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
JH03  ECHELLE        20:20   00:50
UW06  ARCTIC         01:30   05:52
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
JH03/R      20:16  01:10   0.4   0    0    0   0.3  4.2   0    0
UW06/R      01:10  06:04   0.4   0    0    0   4.5  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
At sunset, I could see more smoke from the nearby Apple Tree fire than previous days, but with the wind from the SW the smoke wasn't coming to APO.  Over the course of first half the wind shifted to the SE, then near the changeover time the particle counts started going up, and it was also moderately cloudy at that time.  So I closed the dome while I concentrated on moving the tertiary to NA2 (thanks to Shane Thomas for some timely help!).  After that, the wind shifted back toward the west and the particle counts dropped, so I was able to re-open not long after.
                    ------- 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
--------------------------------------------------------------------------
 20:56 ecamera    516(  496)  63  74  20.6 22.1 22.3 21.7 21.0   ND2  0.88
 01:36 arctic   396( 1324) 265  42  19.9 18.4 18.9 18.2 19.3   VR  1.09
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    78    38      8   252  (WSW)   1194 mstly clr    none
     17:00    76    36      8   255  (WSW)   1134 mstly clr    none
     18:00    78    37     16   241  (WSW)   1086 mstly clr    none
     19:00    75    37     16   222   (SW)   1189    clear     none
     20:00    71    37     12   188    (S)   1357    clear     none
     21:00    69    38     11   159  (SSE)   1582    clear     none
     22:00    68    38     18   139   (SE)   1666    clear     none
     23:00    66    37     20   141   (SE)   1645  ptly cldy   none
     00:00    65    37     13   128   (SE)   1721  ptly cldy   none
     01:00    64    37      3   138   (SE)   2559  ptly cldy   smoke
     02:00    68    37      7   255  (WSW)   1406 mstly clr    none
     03:00    67    37      7   243  (WSW)   1443 mstly clr    none
     04:00    67    37      8   216   (SW)   1435    clear     none
     05:00    66    37      6   207  (SSW)   1322    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.
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