Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, September 23, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UW04  C.Chandler        C.Chandler,I.Chow     
NM07  E.Neilsen         A.Smith               

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW04  ARCTIC         --:--   --:--   
NM07  ECHELLE        --:--   --:--

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW04/R      19:07  01:10    0   6.1   0    0   0.0   0    0    0
NM07/R      01:10  06:44    1.9  3.7   0    0    0   0    0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland

Once again, rain rain go away! Another soggy night where I couldn't open. Called it around 5:30am.

No test slew again tonight due to the constant rain and humidity.

TSL/3.5m air sensor was frozen for a few hours and was only reading 50%ish humidity in a torrential downpour and heavy fog. Dust counter has been active for the wet weather.

                    ------- 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
--------------------------------------------------------------------------

               ------------- WEATHER LOG ----------------

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    49    49      7   144   (SE)          cloudy     none 
     17:00    50    50      8   144   (SE)          cloudy     rain 
     18:00    51    50      4   180    (S)          cloudy   lt rain
     19:00    50    51      9   193  (SSW)          cloudy   lt rain
     20:00    49    49     14   198  (SSW)          cloudy     fog  
     21:00    47    48     10   205  (SSW)          cloudy     fog  
     22:00    48    48     22   206  (SSW)          cloudy     fog  
     23:00    48    49     22   202  (SSW)          cloudy     fog  
     00:00    50    32     25   213  (SSW)    484   cloudy     fog  
     01:00    49    32     17   206  (SSW)  12692   cloudy     fog  
     02:00    50    32     20   197  (SSW)  67468   cloudy     rain 
     03:00    47    32     14   207  (SSW)  14350   cloudy     rain 
     04:00    48    32     18   227   (SW)   9362   cloudy   lt rain
     05:00    47    48      6   190    (S)          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.

              ----------  TELESCOPE SOFTWARE  ----------

Current TCC version: 1.4.2
Current HUB version: v20171231_01
Current TUI version: 3.2.2