Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, July 30, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
EN02  C.Smith           H.Abbot, J.Dembicky, R.McMillan
                                              

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
EN02  TSpec          20:16   22:35   
EN02  NA2Guider      22:35   02:45
EN02  NA2Guider      04:30   05:30

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
EN02/R      20:12  01:10    0    0    0    0   0.7  4.3   0    0
EN02/R      01:10  06:08    0    0    0    0   0.0  5.0   0    0

note: scheduled times listed include instrument change time

              ------------- ACTIVITY LOG --------------
Observing Specialist: H.Abbot, J.Dembicky, R.McMillan

Started checking Tspec centering. Had weird issue detailed in engineering email, but it corrected itself. Tspec centerup confirmed working.
Echelle appears to be behaving normally.
Adjusted ecam focus and mask.
Reconciled NA2Guider focus
Pointing model interrupted by clouds but managed to finish and implement eventually.
Tert tilts adjusted for Echelle and APOLLO

Clouds on and off all night. Closed at 02:45 due to a rain cloud slowly moving in. Reopened to do some final checks before closing again at 05:30. Kept doing engineering tasks so no time lost to weather.

                    ------- 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
--------------------------------------------------------------------------
 22:36 guider   533( 1586) 227  42  20.7 21.1 21.7 20.8 20.8   --  1.17

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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
	
     16:00    73    47      7    79    (E)   2488   cloudy     none 
     17:00    75    46      7   175    (S)   2903   cloudy     none 
     18:00    75    46      4   129   (SE)   3035 mstly cldy   none 
     19:00    71    47     12    89    (E)   2935 mstly clr    none 
     20:00    72    42      7   113  (ESE)   1927  ptly cldy   none 
     21:00    71    42      9    93    (E)   2184   cloudy     none 
     22:00    71    42      8    93    (E)   2263 mstly clr    none 
     23:00    69    43      8    92    (E)   2766  ptly cldy   none 
     00:00    71    43      4    62  (ENE)   2688  ptly cldy   none 
     01:00    70    44      1   312   (NW)   2483  ptly cldy   none 
     02:00    70    44      5   304   (NW)   2578 mstly clr    none 
     03:00    67    42      6   219   (SW)   2553 mstly cldy   none 
     04:00    69    42      7   268    (W)   2469 mstly cldy   none 
     05:00    68    41      2   238  (WSW)   2186  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: 3.2.2