Subject: 3.5m Night Log 20240325
From: cgray@apo.nmsu.edu
Date: Tue, 26 Mar 2024 10:13:03 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Monday, March 25, 2024
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
EN01  B.Ketzeback       C.Gray, R.McMillan
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
EN01  X              --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
EN01/W      19:27  06:50  0.4  11.0   0    0    0    0    0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
We had fog and snow all night and were not able to get on sky. There wasn't much snow, maybe half an inch that accumulated.
I started the night with axes controller restarts.
NA2 rotator was zeroed and off by -0.08.
We did a DIS contamination check and I worked on updated training names.
I took a lot of Echelle IOL exposures and, while the blue seemed to slowly decrease throughout the night, it increased on my last measurement at 4am.
I parked the dome south west in homes that we'll get some sunlight to melt off the snow.
                    ------- 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
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               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    30    18     17   263    (W)    848 mstly cldy  humid
     17:00    29    16     27   246  (WSW)    912 mstly cldy  humid
     18:00    26    17     16   276    (W)          cloudy   lt snow
     19:00    26    20     15   292  (WNW)          cloudy   lt snow
     20:00    21    21     17   285  (WNW)          cloudy     snow
     21:00    23    18     16   265    (W)          cloudy   lt snow
     22:00    22    22     17   287  (WNW)          cloudy   lt snow
     23:00    22    20     16   275    (W)          cloudy   lt snow
     00:00    22    21     17   276    (W)          cloudy    humid
     01:00    22    21     11   264    (W)          cloudy    humid
     02:00    22    20     10   265    (W)          cloudy   lt snow
     03:00    21    21     16   281    (W)          cloudy   lt snow
     04:00    21    23     14   274    (W)          cloudy     fog
     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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