Subject: 3.5m Night Log 20240228
From: ajt@apo.nmsu.edu
Date: Thu, 29 Feb 2024 11:34:49 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, February 28, 2024
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
GS02  D.Gies            K.Shepard
UW03  S.Hawley          L.Hebb
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
GS02  ECHELLE        --:--   --:--
UW03  ARCTIC         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
GS02/R      18:08  00:10  3.8  2.3    0    0   0.0  0.0   0    0
UW03/R      00:10  06:23    0  6.2    0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
Combination of elevated dust + humidity meant we stayed closed at sunset, and the humidity continued to rise as tonight's storm got closer.
It started snowing a little before 21:00 and didn't really stop, though sometimes we were getting more fog than snow.
Ran snow program from 22:20 to 04:00, dome is parked south. Morning instrument fills completed.
Happy leap day!
                    ------- 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
--------------------------------------------------------------------------
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    37    27     14   146   (SE)   3144  ptly cldy   dust
     17:00    36    25      6   154  (SSE)   1691  ptly cldy   none
     18:00    31    23      9    86    (E)   3488  ptly cldy   dust
     19:00    30    25     15   149  (SSE)          cloudy    humid
     20:00    32    28     17   149  (SSE)          cloudy   lt snow
     21:00    31    30     13   159  (SSE)          cloudy     snow
     22:00    30    30     28   150  (SSE)          cloudy     snow
     23:00    29    30     28   140   (SE)          cloudy     snow
     00:00    29    29     22   146   (SE)          cloudy   lt snow
     01:00    28    27     15   152  (SSE)          cloudy     snow
     02:00    27    28     13   210  (SSW)          cloudy     snow
     03:00    28    31     15   208  (SSW)          cloudy     snow
     04:00    29    29     14   205  (SSW)          cloudy   lt snow
     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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