Subject: 3.5m Night Log 20250903
From: tsutherland@apo.nmsu.edu
Date: Thu,  4 Sep 2025 12:35:13 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, September 03, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW05  A.Heinze          A.Heinze
NM06  A.Smith           E.Neilsen,A.Peck
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW05  Echelle        --:--   --:--
NM06  ECHELLE        02:41   06:09
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW05/R      19:33  01:10    0   5.6   0    0   0.0   0    0    0
NM06/R      01:10  06:32    0   1.5   0    0   1.8  2.1   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland
Radar returns and clouds kept us closed most of the night.
Restarted echelle icc when it got hung up after cals were stopped.
Motion error at 5:23am slewing down in alt at 42.4deg.
                    ------- 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
--------------------------------------------------------------------------
 02:50 ecamera    337(  132)  -9  27  14.2 14.2 16.0 14.1 13.8   ND1  1.64
 04:01 ecamera    243(  -14) -151  47  14.4 13.5 14.4 13.1 13.3   ND2  1.23
 ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    64    41      4   208  (SSW)    653   cloudy     none
     17:00    63    40      7   259    (W)    708   cloudy     none
     18:00    63    39     12   231   (SW)    689   cloudy     none
     19:00    60    41      8   247  (WSW)    719 mstly cldy   none
     20:00    58    41      6   252  (WSW)    749 mstly cldy   none
     21:00    58    41      4   202  (SSW)    692 mstly cldy   none
     22:00    58    40      3   194  (SSW)    652 mstly cldy   none
     23:00    58    41      6   259    (W)    721 mstly cldy   none
     00:00    58    39      6   271    (W)    743  ptly cldy   none
     01:00    57    40      5   253  (WSW)    673  ptly cldy   none
     02:00    58    39      8   268    (W)    734 mstly clr    none
     03:00    58    39      5   261    (W)    680 mstly clr    none
     04:00    58    39      3   252  (WSW)    677 mstly clr    none
     05:00    57    39      5   244  (WSW)   1057 mstly clr    none
     06:00    56    39      2   248  (WSW)   1078 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.
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