Apache Point Observatory
                      3.5m Telescope Night Log
                      Monday, April 13, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UW04  C.Chandler        M.Frissell,D.Singh    
UW03  F.ChabourBarra    F.ChabourBarra        

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW04  ARCTIC         --:--   --:--   
UW03  KOSMOS         --:--   --:--

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW04/R      19:41  01:10   5.5   0    0    0   0.0  0.0   0    0
UW03/R      01:10  06:26   3.6  1.7   0    0   0.0  0.0   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend

UW04 swapped in for UW05 tonight A-half.

Tonight we had virga and radar and gusty wind. It was completely overcast all night, so we stayed closed.

Restarted frozen dataq in the middle of the night.

                    ------- 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    50    29     18   266    (W)    754   cloudy     none 
     17:00    49    24     25   249  (WSW)   1005   cloudy     none 
     18:00    49    27     29   267    (W)   1167   cloudy     none 
     19:00    48    28     27   256  (WSW)   3308   cloudy     none 
     20:00    47    30     35   253  (WSW)   1244   cloudy     none 
     21:00    44    32     17   273    (W)   2638   cloudy     none 
     22:00    45    31     15   255  (WSW)   1139   cloudy     none 
     23:00    44    31     18   265    (W)    791   cloudy     none 
     00:00    44    31     18   236   (SW)    655   cloudy     none 
     01:00    43    31     21   209  (SSW)    721   cloudy     none 
     02:00    43    31     28   221   (SW)    493   cloudy     none 
     03:00    44    30     29   228   (SW)    431   cloudy     none 
     04:00    44    30     29   213  (SSW)    468   cloudy     none 
     05:00    43    29     21   209  (SSW)    424   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.

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

Current TCC version: 1.4.2
Current HUB version: v20171231_01
Current TUI version: 3.1.8