Apache Point Observatory
                      3.5m Telescope Night Log
                      Monday, June 01, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
UV03  Y.Zhou            J.Davidson                    

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UV03  DSSI           --:--   --:--   
UV03  DSSI           04:53   05:47

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UV03/R      20:15  01:10    1.4   3.5    0    0   0   0   0    0
UV03/R      01:10  05:47    0   3.7    0    0   0.0  0.9   0    0

note: scheduled times listed include instrument change time

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

Radar returns nearby all night as well as a lot of clouds.

Finally was able to open with some clouds just before 5am and went until sunrise.

No problems tonight. 

                    ------- 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
--------------------------------------------------------------------------
 05:12 dssi   189( 1364)  40  64  14.6 14.4 16.4 14.5 14.4   692nm  1.00

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    74    30     13   262    (W)   1241  ptly cldy   none 
     17:00    75    30     24   220   (SW)   1235  ptly cldy   none 
     18:00    66    39     28   201  (SSW)   1591 mstly cldy lt rain
     19:00    62    41     18   120  (ESE)   1609 mstly cldy   none 
     20:00    58    42     18    87    (E)   1675 mstly cldy   none 
     21:00    59    39     16    86    (E)   1176 mstly cldy   none 
     22:00    58    40     12    86    (E)   1160 mstly cldy   none 
     23:00    57    40     18    91    (E)   1249   cloudy     none 
     00:00    57    42     18    91    (E)   1375   cloudy     none 
     01:00    57    43     17   103  (ESE)   1478   cloudy     none 
     02:00    57    44     16   115  (ESE)   1674 mstly cldy   none 
     03:00    59    40     11   128   (SE)   1513 mstly cldy   none 
     04:00    59    37      8   174    (S)   1263 mstly cldy   none 
     05:00    59    41     15   140   (SE)   1687 mstly cldy   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