Subject: 3.5m Night Log 20240415
From: ajt@apo.nmsu.edu
Date: Tue, 16 Apr 2024 12:50:18 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Monday, April 15, 2024
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
AP02  S.Merkowitz       R.McMillan,A.Townsend
UW02  P.Yoachim         J.Jiang
NM07  W.Roberson        A.Peck,E.Nielsen
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
AP02  APOLLO         --:--   --:--
UW02  KOSMOS         22:36   01:00
NM07  ECHELLE        01:06   06:16
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
AP02/R      19:42  22:10    0  2.5    0    0   0.0  0.0   0    0
UW02/R      22:10  01:10    0  0.4    0    0   0.0  2.6   0    0
NM07/R      01:10  06:23    0    0    0    0   3.4  1.9   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
Today's windstorm brought in a lot of dust! 1-micron counts went up to about 60,000.
Indoor optidew showed a weird reading around 22:45.
One fiducial error too large az warning around 04:40 but it happened at the start of a slew after tracking for a while.
Wind and dust finally abated and we were able to open after 22:30. Seeing was atrocious but the sky was otherwise clear. A few thin clouds showed up after 01:00 but the seeing also improved, and though the wind got a little gustier again after it shifted to the north, we were able to stay 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
--------------------------------------------------------------------------
 21:50 kosmos   400( 1017)  40  49   3.0  5.4  6.9  5.3  3.6   --  3.50
 00:10 ecamera    389( -252) -149  67   1.7  1.3  2.9  1.8  1.8   ND3  1.59
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    52     4     26   254  (WSW)   6791    clear     dust
     17:00    52     6     33   287  (WNW)  15112    clear     dust
     18:00    49     7     32   287  (WNW)  57743    clear     dust
     19:00    46    10     28   269    (W)  15940    clear     dust
     20:00    43    11     25   268    (W)  38033    clear     dust
     21:00    42    11     30   288  (WNW)   5066    clear     dust
     22:00    39     7     23   281    (W)   3236    clear     none
     23:00    37     4     14   280    (W)   1557    clear     none
     00:00    36     4     23   307   (NW)   1373    clear     none
     01:00    35     6     12   332  (NNW)   1043 mstly clr    none
     02:00    35     7      8   277    (W)    853 mstly clr    none
     03:00    34    10      1   209  (SSW)    650 mstly clr    none
     04:00    34    11     13    19  (NNE)    867 mstly clr    none
     05:00    34    15     25    12  (NNE)    642 mstly clr    none
     06:00    32    15     28    20  (NNE)    644 mstly clr    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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