Subject: 3.5m Night Log 20250415
From: tsutherland@apo.nmsu.edu
Date: Wed, 16 Apr 2025 12:48:41 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, April 15, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
EN01  B.Ketzeback       T.Sutherland,R.McMillan,C.Gray
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
EN01  AGILE          19:45   23:52
EN01  X              01:13   04:30
EN01  Echelle        04:30   06:24
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
EN01/W      19:42  06:24    0   1.4   0    0   2.6  6.7   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland, R.McMillan, C.Gray
Opened the dome at 6:15 to start venting. We had some really drastic swings in dust at the start of the night, but stayed open. Closed for dust at around 11:55pm.
Arcsat got lost, I had to fix the clocks and pointing.
Candace (NM02) was observing Venus on Echelle from about 4:30am til sunrise. No IOL because of cals.
Collimation check done.
Agile rotator tests and some twilight flats were done.
More testing needed on the arctic diffuser. Intermittent failures.
Pointing model data was taken, but could not be implemented due to error in tek recognizing the graphics window.
                    ------- 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
--------------------------------------------------------------------------
 01:34 NA2gdr 35509(35509) 106  78   9.9 10.3 10.9 10.2 10.0   clear  1.28
 04:37 ecamera    314(   83)  97  27   9.6  9.4 10.0  9.4  9.4   ND3  2.07
       ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    58    30     11   263    (W)   3073    clear     none
     17:00    62    26     16   204  (SSW)   2559    clear     none
     18:00    60    23     15   232   (SW)   2435    clear     none
     19:00    57    24      7   189    (S)   2715    clear     none
     20:00    48    31      6   184    (S)   3092    clear     none
     21:00    51    23     10   200  (SSW)   2758    clear     none
     22:00    53    23     14   226   (SW)   2782    clear     none
     23:00    52    24     12   214   (SW)   3421    clear     dust
     00:00    52    25     15   200  (SSW)   4232    clear     dust
     01:00    51    24     15   204  (SSW)   2535    clear     none
     02:00    51    26     15   187    (S)   2725    clear     none
     03:00    50    29     14   184    (S)   2403    clear     none
     04:00    50    31     17   189    (S)   3028    clear     none
     05:00    50    33     27   202  (SSW)   3317    clear     none
     06:00    49    32     22   219   (SW)   3188    clear     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