Subject: 3.5m Night Log 20250523
From: cgray@apo.nmsu.edu
Date: Sat, 24 May 2025 11:28:01 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, May 23, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
GS01  D.Michael         J.Falcone
OU02  J.Serna           J.Serna
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
GS01  KOSMOS         20:42   00:10
OU02  KOSMOS         01:33   05:00
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
GS01/R      20:10  01:10   1.0   0    0    0   4.0  0.0   0    0
OU02/R      01:10  05:50   0.4   0    0    0   2.2  2.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
A hectic start of the night. During checkout, ARCTIC ion pump started sending out errors about pressure. The controller was restarting itself but was not able to stay on. Cary came in and tried restarting the controller, tapping the ion pump, and moving to the analog controller. Nothing helped. Arctic isn't on until Monday but Cary will need to come in over his vacation time to address the issue. I sent a PR (PR 2246).
The weather started out with some clouds, but no real issue. They started thickening up a couple hours after sunset. GS01 gave up an hour before their time was done and OU02 was delayed starting on their field as well due to the clouds. Seeing was moderate.
                    ------- 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
--------------------------------------------------------------------------
 20:55 khigh   168( 1335)  35  72  16.8 18.6 18.9 17.7 17.2   --  1.43
 01:33 klow   277( 1312) 324  75  16.5 15.8 16.4 15.8 16.1   --  1.28
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    72    22     22   250  (WSW)   2082 mstly clr    none
     17:00    72    22     17   234   (SW)   2294 mstly clr    none
     18:00    70    22     22   248  (WSW)   3334 mstly clr    none
     19:00    68    19     16   272    (W)   2807 mstly clr    none
     20:00    65    15     19   263    (W)   2672 mstly clr    none
     21:00    63    13     17   268    (W)   2509  ptly cldy   none
     22:00    62    13     10   271    (W)   2306  ptly cldy   none
     23:00    63    13     16   296  (WNW)   2349 mstly cldy   none
     00:00    62    12     12   278    (W)   2265 mstly cldy   none
     01:00    62    12     10   277    (W)   2380 mstly cldy   none
     02:00    61    12     11   263    (W)   2442  ptly cldy   none
     03:00    60    11     10   265    (W)   2388  ptly cldy   none
     04:00    60    11      9   202  (SSW)   2348 mstly clr    none
     05:00    58     9      3   250  (WSW)   2358 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.
              ----------  TELESCOPE SOFTWARE  ----------
Current TCC version: 1.4.2
Current HUB version: v20171231_01
Current TUI version: 3.1.8