Subject: 3.5m Night Log 20241205
From: cgray@apo.nmsu.edu
Date: Fri,  6 Dec 2024 12:41:44 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, December 05, 2024
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
AP01  S.Merkowitz       R.McMillan
WY01  M.Brotherton      M.Brotherton
UW07  C.Chandler        M.Frissell
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
AP01  APOLLO         --:--   --:--
WY01  KOSMOS         --:--   --:--
UW07  ARCTIC         00:42   04:19
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
AP01/R      17:06  18:06   1.0   0    0    0    0    0    0   0.0
WY01/R      18:06  00:10   2.9  3.2   0    0    0    0    0    0
UW07/R      00:10  06:43   2.7   0    0    0   3.9  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
Dataq needed a restart during checkout.
The night started with clouds and humidity, but not snow as initially anticipated. I thought we were going to be hosed all night given the humidity and fog, but there was a wind shift and humidity plummeted!! We were able to open a little before 1 am to moderate seeing. However, just as fast, the wind shifted and humidity spiked after 4am. We closed and were not able to reopen as the fog returned and we were left in soup.
                    ------- 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
--------------------------------------------------------------------------
 00:51 arctic   215(  599) -83  61   2.7 -0.3  0.4 -0.7  0.9   sdss-r  1.38
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    37    31      8    87    (E)          cloudy    humid
     17:00    34    30      9    95    (E)        mstly cldy  humid
     18:00    32    29      6   103  (ESE)        mstly cldy  humid
     19:00    30    29     14    78  (ENE)         ptly cldy   fog
     20:00    29    28     11    89    (E)        mstly cldy   fog
     21:00    28    28      9    72  (ENE)        mstly cldy   fog
     22:00    28    28     14    87    (E)        mstly clr   humid
     23:00    31    24      2   155  (SSE)        mstly clr   humid
     00:00    33    24      1   191    (S)        mstly clr    none
     01:00    38    14      1   154  (SSE)    417 mstly clr    none
     02:00    38     8      7   137   (SE)    330  ptly cldy   none
     03:00    38     7     16   143   (SE)    212 mstly cldy   none
     04:00    35    30     17   137   (SE)        mstly cldy  humid
     05:00    33    32     17   136   (SE)          cloudy     fog
     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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