Subject: 3.5m Night Log 20240528
From: mcroom@apo.nmsu.edu
Date: Wed, 29 May 2024 09:48:47 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, May 28, 2024
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW02  P.Yoachim         J.Jiang
JH01  Z.Rustamkulov     Z.Rustamkulov
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW02  KOSMOS         20:56   23:12
JH01  KOSMOS         23:12   03:10
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW02/R      20:13  23:10    0    0    0    0   3.0  0.0   0    0
JH01/R      23:10  05:48    0   2.6   0    0   1.8  2.2   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: M.Croom
DSSI PI wanted to get a post-run assessment of the rotator zero, so we checked it with the level and re-zeroed with an input of -0.0135.
Conditions were good initially (clear, low humidity and dust, 1.7 arc second seeing) until a weather system with strong outflows brought a rapid onset of dust, 5+ arc second seeing and humidity just after 03:00.
Possible dust event: the 1-micron dust count climbed to about 5500 before I could close, and humidity was increasing above 60%.
With poor conditions following good science, the observer decided to give up. We closed for the night early.
                    ------- 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
--------------------------------------------------------------------------
 21:27 kosmos   300( 1498) -121  62  17.9 18.1 18.4 17.6 17.8   -  1.74
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    74    24     30   232   (SW)    904    clear     none
     17:00    72    22     17   266    (W)   1060    clear     none
     18:00    69    19     19   305   (NW)   1213    clear     none
     19:00    68    18     11   260    (W)   1227    clear     none
     20:00    65    15     12   267    (W)   2668    clear     none
     21:00    64    14     15   286  (WNW)   1324    clear     none
     22:00    63    13     14   288  (WNW)    886    clear     none
     23:00    64    13     15   308   (NW)    842    clear     none
     00:00    63    12      5   340  (NNW)    771 mstly clr    none
     01:00    63    13     12   322   (NW)    951 mstly clr    none
     02:00    63    13     12   313   (NW)    974 mstly clr    none
     03:00    54    14     12    83    (E)   1399 mstly clr    dust
     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.
              ----------  TELESCOPE SOFTWARE  ----------
Current TCC version: 1.4.2
Current HUB version: v20171231_01
Current TUI version: 3.1.5