Subject: 3.5m Night Log 20240405
From: ajt@apo.nmsu.edu
Date: Sat,  6 Apr 2024 12:18:27 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, April 05, 2024
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
NM02  P.HolguinLuna     P.HolguinLuna
NM04  M.Prescott        M.Prescott
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM02  KOSMOS         21:48   00:10
NM04  ARCTIC         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM02/R      19:35  01:10  3.2    0    0    0   2.4  0.0   0    0
NM04/R      01:10  06:36  4.3  1.1    0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
Reset barometer twice, pressure readings never came back.
Clouds and then dust kept us closed until almost 20:00, when the dust finally seemed to settle down under the limit.
Closed due to wind a little after midnight; dust went back up shorter after. Wind gust speeds got up to about 55mph and 1-micron dust counts up to 30,000 cts. We were unable to open for the rest of the night.
                    ------- 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
--------------------------------------------------------------------------
 20:58 kimage   350( 1033) -25  58   5.9  7.0  8.1  6.9  6.2   --  1.20
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    49    18     18   235   (SW)   2046   cloudy     none
     17:00    48    18     23   229   (SW)   1736   cloudy     none
     18:00    47    18     17   222   (SW)   1673   cloudy     none
     19:00    46    16     24   215   (SW)   1567   cloudy     none
     20:00    44    18     15   219   (SW)   3851  ptly cldy   dust
     21:00    43    16     14   250  (WSW)   4055  ptly cldy   dust
     22:00    43    15     16   223   (SW)   3658 mstly clr    none
     23:00    41    17     25   223   (SW)   2611 mstly clr    none
     00:00    40    17     24   219   (SW)   3761 mstly clr    dust
     01:00    36    16     20   249  (WSW)   5546 mstly clr    dust
     02:00    35    19     33   217   (SW)   3930  ptly cldy   dust
     03:00    35    20     34   220   (SW)   3533  ptly cldy   dust
     04:00    33    22     31   248  (WSW)   5311   cloudy     dust
     05:00    32    23     24   246  (WSW)  29936   cloudy     dust
     06:00    29    28     24   262    (W)          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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