Subject: 3.5m Night Log 20250318
From: mcroom@apo.nmsu.edu
Date: Wed, 19 Mar 2025 13:58:48 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, March 18, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
GS03  T.Henry           E.Horch,J.Davidson
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
GS03  DSSI           01:43   06:56
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
GS03/R      19:22  06:59   4.1  2.2    0    0   0.0  5.3   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: M.Croom
Support from J.Dembicky.
High dust and winds persisted throughout A half and a bit into B Half. Once open we stayed open until dawn.
Power flickered in the early evening and the mirror covers had to be reset, and this also set off a notification about ARCTIC and the USB which self-reset.
In light of recent issues, a couple of test 15-s Object exposures were taken with ARCTIC even though it was not on tonight. The resulting quad, medium, 2x2 bin exposures were normal, with no dropped quads, no gradients, and no quads with constant levels.
                    ------- 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
--------------------------------------------------------------------------
 01:52 dssi  -190(  415) 113  54  -4.7 -2.1 -0.1 -3.4 -4.1   692  2.40
 03:46 dssi   200(  650) 196  61  -5.3 -5.4 -4.5 -5.4 -5.3   692  1.50
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    43    13     49   272    (W) 186767    clear     dust
     17:00    37    11     37   278    (W) 415639    clear     dust
     18:00    34    -1     40   271    (W) 167759    clear     dust
     19:00    32   -11     35   271    (W)  88854    clear     dust
     20:00    29    -8     29   273    (W)  35900    clear     dust
     21:00    28    -6     21   282  (WNW)  14677    clear     dust
     22:00    27    -4     22   285  (WNW)   6960    clear     dust
     23:00    26     0     24   281    (W)   7251    clear     dust
     00:00    25     3     28   306   (NW)   3351    clear     dust
     01:00    24     6     14   274    (W)   7354    clear     dust
     02:00    24     6     10   298  (WNW)   2513    clear     none
     03:00    23     5      6   340  (NNW)   1231    clear     none
     04:00    22     3     17   311   (NW)   1003    clear     none
     05:00    21     1     14   317   (NW)    770    clear     none
     06:00    20     3     17   304   (NW)   1044    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