Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, April 14, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
NM01  A.Menchaca        A.Menchaca,M.Prescott,J.Burchett
UW01  P.Yoachim         Z.Liu,Z.Xu,D.Meng     
WY01  M.Brotherton      M.Brotherton          

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM01  KOSMOS         --:--   --:--   
UW01  KOSMOS         --:--   --:--
WY01  KOSMOS         05:25   06:00

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM01/R      19:41  01:10  5.5    0    0    0   0.0  0.0   0    0
UW01/R      01:10  04:45  3.6    0    0    0   0.0  0.0   0    0
WY01/R      04:45  06:25  0.5  0.2    0    0   0.0  1.0   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: H.Abbot,A.Townsend

Amanda took first half, reported no issues. Overcast for first half with some rain and high gusts.
Cloud and nearby rain persisted throughout UW01.
Dataq restart required around 0430.
Rain had cleared the area by 0510, opened at 0525.
Earlier test slews went fine but after we opened, got motion errors in altitude. Did an axis stop and start, didn't solve the issue. Went up to the dome and did a stop and start again, heard the brake disengaging and the error went away. Issue occured near 72deg alt when slewing upwards. Was in a rush to get on sky for what little time we had left so didn't investigate further.

                    ------- 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
--------------------------------------------------------------------------
 05:44 khigh   285(  565) -65  49   3.3  3.6  4.5  3.5  3.1   --  0.96

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    44    32     18   256  (WSW)   6543   cloudy     none 
     17:00    48    33      9   264    (W)   3106   cloudy     none 
     18:00    46    32     15   217   (SW)   1540   cloudy     rain 
     19:00    40    25     12   218   (SW)          cloudy     rain 
     20:00    42    31     17   250  (WSW)          cloudy    humid 
     21:00    43    30     21   262    (W)   1386   cloudy     none 
     22:00    42    30     14   232   (SW)   1792   cloudy     none 
     23:00    42    28     21   213  (SSW)   2431   cloudy     none 
     00:00    41    28     16   211  (SSW)   1223   cloudy     none 
     01:00    41    28     15   239  (WSW)   1100   cloudy     none 
     02:00    40    24      8   265    (W)    838   cloudy     none 
     03:00    39    19     10   308   (NW)    834   cloudy     none 
     04:00    40    15     13   305   (NW)    808 mstly cldy   none 
     05:00    38    14      7   323   (NW)    721  ptly cldy   none 
     06:00    38    14      9   324   (NW)    704  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