Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, March 11, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
CU02  Z.Berta-Thompson  Z.Berta-Thompson      
NM01  S.Monty           S.Monty               

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
CU02  KOSMOS         19:38   23:44   
NM01  ECHELLE        23:48   04:21

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
CU02/R      19:17  01:10    0    0    0    0   5.9  0.0   0    0
NM01/R      01:10  07:09    0  2.8    0    0   2.0  1.1   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: H.Abbot, T.Sutherland

Mirror covers needed a reset in afternoon checks. Windows updates stopped Alcor from working, just had to log in and start Skywatch to fix. Two dataq restarts in the night. Multiple Arcsat issues, expanded on in a seperate email.

Clear night with steadily increasing dust throughout. Dust forced closure at 0421. 

CU02 finished early and donated the remaining time to NM01. 

                    ------- 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
--------------------------------------------------------------------------
 20:17 kosmos   280(  717) -69  54   4.2  7.1  6.6  6.1  4.8   --    1.67
 00:09 ecamera  461( -202) 235  32   4.9  4.6  5.2  4.3  4.5   Clear 0.81
 01:38 ecamera  475( -239) 115  32   3.1  3.5  4.2  3.3  2.9   Clear 1.21


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

                               Wind                      Precip.or
 Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
------------------------------------------------------------------

 16:00    50    31      8   277    (W)   1194    clear     none 
 17:00    48    28     12   269    (W)   1248    clear     none 
 18:00    48    27     13   221   (SW)   1488    clear     none 
 19:00    45    27      6   232   (SW)   1746    clear     none 
 20:00    38    26     10    57  (ENE)   1672    clear     none 
 21:00    40    25      4   104  (ESE)   1619    clear     none 
 22:00    44    23      4   225   (SW)   1222    clear     none 
 23:00    43    24      6   262    (W)   1336    clear     none 
 00:00    41    25      6   262    (W)   1763    clear     none 
 01:00    40    26      6   263    (W)   2019    clear     none 
 02:00    37    25      7   224   (SW)   2169    clear     none 
 03:00    37    27      9   222   (SW)   3151    clear     none 
 04:00    36    26     10   226   (SW)   3591    clear     none 
 05:00    36    25     10   255  (WSW)           clear     dust 




     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