Subject: 3.5m Night Log 20240225
From: mcroom@apo.nmsu.edu
Date: Mon, 26 Feb 2024 13:30:50 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, February 25, 2024
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
GS03  T.Henry           J.Davidson,R.Wilson
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
GS03  DSSI           20:01   06:03
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
GS03/O     18:05  06:27   1.1  1.2   0    0   0.0 10.1   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: M.Croom,J.Dembicky
The night started out cloudy, too thick for DSSI until about 20:00 when we went on sky. Only brighter targets were within reach of DSSI. Occasionally DSSI paused their imaging while thicker clouds were present. Most of the final 2 or 3 hours were spent with the DSSI team poised to take images if the cloud conditions improved but there were only a few opportunities.
Closed 24 minutes early due to nearby radar.
One micron dust was near limits midway in A Half but subsided substantially and was not a factor.
During afternoon test slews, one fiducial error was encountered in az.
Mark was given in-dome training of ARCSAT, but without actually going on sky.
                    ------- 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
--------------------------------------------------------------------------
 20:23 dssi   340( 1469) -68  58   8.5  9.0  9.2  8.9  8.6   692nm  1.30
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    53    24     16   261    (W)    241 mstly cldy   none
     17:00    50    22     15   267    (W)    246 mstly cldy   none
     18:00    48    21     13   264    (W)    357 mstly cldy   none
     19:00    48    21     15   268    (W)    467 mstly cldy   none
     20:00    47    20     10   265    (W)    586  ptly cldy   none
     21:00    47    20     11   267    (W)   3109  ptly cldy   none
     22:00    48    22     11   263    (W)   1021  ptly cldy   none
     23:00    48    24     15   293  (WNW)    183  ptly cldy   none
     00:00    48    24     13   264    (W)    124  ptly cldy   none
     01:00    48    24     18   262    (W)    202  ptly cldy   none
     02:00    47    23     21   242  (WSW)    240  ptly cldy   none
     03:00    46    23     21   233   (SW)    262 mstly cldy   none
     04:00    44    23     13   224   (SW)    463 mstly cldy   none
     05:00    45    24     18   244  (WSW)    405   cloudy     none
     06:00    45    24     15   261    (W)    336   cloudy     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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