Subject: 3.5m Night Log 20250511
From: tsutherland@apo.nmsu.edu
Date: Mon, 12 May 2025 11:49:14 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, May 11, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW08  S.Hawley          S.Hawley,L.Hebb
AP02  S.Merkowitz       R.McMillan,T.Sutherland
NM02  C.Gray		C.Gray
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW08  ECHELLE        20:01   01:04
AP02  APOLLO         01:07   02:37
NM02  ECHELLE	     04:03   05:03
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW08/R      20:01  01:10    0    0    0    0   0.0  5.2   0    0
AP02/R      01:10  04:00   0.1  1.2   0    0    0   1.5   0    0
NM02/R      04:00  05:58    0   1.0   0    0    0   1.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland
Opened to vent around 5:30pm. Some light clouds but nothing too bad to start the night.
Motion error in alt at 62.6 deg heading to 52.6 deg with UW08.
Motion error in alt at 51.8 deg heading to 42.3 deg with NM02.
Never got on sky ranging with Apollo due to clouds and other issues, but we ran different tests, so the time was still productive.
AP02 donated a couple hours to NM02. Starting at 4:03am. Gave up at 5:03am due to clouds.
                    ------- 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
--------------------------------------------------------------------------
 20:14 ecamera    196(   94) 186  52  11.6 12.6 12.6 11.9 11.7   ND2  1.11
 21:36 ecamera    219(   51) 184  39  11.2 10.9 11.3 10.3 10.7   clear  1.62
 01:14 APOLLO     269( 1826)  -5  48  10.9  9.9 10.6 10.0 10.4   --  1.70
 04:15 ecamera    313(   95)  87  44  10.4 10.0 10.5 10.1 10.2   clear  1.23
   ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    61    20     16   263    (W)   1619 mstly clr    none
     17:00    62    17     14   217   (SW)   2126 mstly clr    none
     18:00    59    15      7   266    (W)   1700 mstly clr    none
     19:00    58    15     13   217   (SW)   1792 mstly clr    none
     20:00    52    14      9   233   (SW)   1825 mstly clr    none
     21:00    53    13      7   196  (SSW)   1895 mstly clr    none
     22:00    52    13     11   195  (SSW)   1925 mstly clr    none
     23:00    52    12     11   188    (S)   1851 mstly clr    none
     00:00    52    14      9   185    (S)   2127 mstly clr    none
     01:00    52    11      9   185    (S)   1946 mstly clr    none
     02:00    53    10      3   251  (WSW)   2049  ptly cldy   none
     03:00    50    13      6   198  (SSW)   1975 mstly cldy   none
     04:00    51    16      7   215   (SW)   2985   cloudy     none
     05:00    51    18      6   231   (SW)   2660   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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