Subject: 3.5m Night Log 20250814
From: mcmillan@apo.nmsu.edu
Date: Fri, 15 Aug 2025 14:11:43 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, August 14, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
WY02  C.Kobulnicky      N.Patten
UW03  P.Yoachim         D.Meng,Z.Yu
AP02  S.Merkowitz       R.McMillan.T.Sutherland
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WY02  KOSMOS         22:00   00:40
UW03  KOSMOS         --:--   --:--
AP02  APOLLO         04:00   04:40
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WY02/R      19:57  01:10   2.0  0.5   0    0   1.0  1.7   0    0
UW03/R      01:10  03:44    0   2.6   0    0   0.0  0.0   0    0
AP02/R      03:44  06:18    0   2.0   0    0   0.0  0.6   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
Recent rain and lingering radar kept us closed for a while after sunset, but the
clouds appeared thinner from below than they did on the satellite, so once I thought
it was safe I opened the dome.  After midnight, clouds got thicker again and then
the dust had a spike, so I closed before the program changeover.
Another thin patch between clouds gave an opportunity for APOLLO to get actual
signal from 5 reflectors including the new one, for the first time in a couple of
months.  And then the radar started popping up.  And then a second dewpoint sensor
went offline, which also caused the dust counter to stop counting, so I figured it
was time to call it a win.
                    ------- 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
--------------------------------------------------------------------------
 22:17 kosmos   525( 1497) 319  37  17.4 18.2 17.8 17.9 17.3   -  1.18
 03:59 APOLLO     450( 2047)  73  67  15.1 15.3 16.4 15.2 14.9   530  1.30
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    61    43     10   174    (S)   1155   cloudy   lt rain
     17:00    66    39      2   131   (SE)    687   cloudy     none
     18:00    68    47      6   259    (W)   1054 mstly cldy   none
     19:00    66    45     12   142   (SE)    994 mstly cldy   none
     20:00    63    44     11   141   (SE)    873 mstly cldy   none
     21:00    63    41      6   170    (S)   1010  ptly cldy   none
     22:00    64    40      9   148  (SSE)   1029  ptly cldy   none
     23:00    63    39      9   182    (S)    831  ptly cldy   none
     00:00    63    40     13   197  (SSW)    843 mstly cldy   none
     01:00    59    47      9   192  (SSW)   5663 mstly cldy   dust
     02:00    60    47      8   184    (S)   1867 mstly cldy   none
     03:00    58    47      5   197  (SSW)   2589  ptly cldy   none
     04:00    60    48      8   210  (SSW)   1829 mstly clr    none
     05:00    59    48      7   184    (S)         ptly cldy  humid
     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: 3.1.8