Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, March 29, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
AV01  A.Verbiscer       A.Verbiscer           
UW02  P.Yoachim         D.Meng,Z.Xu,Z.Liu     
NM06  W.Roberson        W.Roberson,A.Abbas    

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
AV01  ARCTIC         19:30   01:03   
UW02  KOSMOS         01:18   03:35
NM06  ECHELLE        03:41   06:24

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
AV01/R      19:30  01:10    0    0    0    0   0.0  5.7   0    0
UW02/R      01:10  03:40    0    0    0    0   0.0  2.5   0    0
NM06/R      03:40  06:45    0    0    0    0   1.1  2.0   0    0

note: scheduled times listed include instrument change time

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

We had a small power flash at 20:12. 

Annoying clouds of varying thickness all night but we were able to observe through them and had pretty good seeing all night. 

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
--------------------------------------------------------------------------
 19:16 arctic   336( 1242)  74  31  13.2 14.5 13.8 13.7 12.5   SDSS_r  1.02
 23:16 arctic   467( 1205)  22  51  11.9 11.3 12.0 11.1 11.5   SDSS_r  0.71
 00:26 kosmos   475( 1103)  29  52  11.6 11.1 11.8 10.9 11.2   --  0.72

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    60    20      1   232   (SW)   2285  ptly cldy   none 
     17:00    61    20      8   348  (NNW)   2223  ptly cldy   none 
     18:00    59    19     11   322   (NW)   2127  ptly cldy   none 
     19:00    57    19      2   329  (NNW)   2350  ptly cldy   none 
     20:00    55    19      2   316   (NW)   2414  ptly cldy   none 
     21:00    55    19      2   237  (WSW)   2488  ptly cldy   none 
     22:00    54    19      7   238  (WSW)   2490  ptly cldy   none 
     23:00    54    21      9   189    (S)   2528 mstly cldy   none 
     00:00    54    20      7   193  (SSW)   2627 mstly cldy   none 
     01:00    54    22     11   215   (SW)   2754 mstly cldy   none 
     02:00    53    22     12   200  (SSW)   2997 mstly cldy   none 
     03:00    53    20      9   206  (SSW)   2555 mstly cldy   none 
     04:00    51    19      8   196  (SSW)   2508 mstly clr    none 
     05:00    53    19      9   229   (SW)   2440  ptly cldy   none 
     06:00    52    19      9   249  (WSW)   2294  ptly 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