Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, March 06, 2026

PROG  PI ASTRONOMER      OBSERVER(S) 
--------------------------------------------------------------------
EN01  B.Ketzeback       H.Abbot,A.Townsend,R.McMillan    

                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
EN01  TSPEC          18:17   20:15   
EN01  KOSMOS         20:25   0:00
EN01  SHACK          00:00   01:00   
EN01  ECHELLE        01:00   05:15

   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
EN01/W      18:13  00:10    0    0    0    0   3.2  2.7   0    0
EN01/W      00:10  06:15    0    0    0    0   0.0  6.1   0    0

note: scheduled times listed include instrument change time

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

Clouds ranged from partly cloudy to mostly cloudy all night but were mostly thin enough for observations. 

DATAQ restarted at start of night because it was frozen. 

Engineering tasks: 
- TSPEC inst block 
- Obs spec training
- KOSMOS on sky checks for order blocking filters and reflections
- Collimation checks with Shack (looks good)


                    ------- 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
--------------------------------------------------------------------------
 18:28 tcamera    522( 1014) 136  61   1.9  3.0  3.1  2.2  1.5   Ks  1.03
 20:15 tcamera    455(  838) 170  73   1.4  0.8  1.8  0.8  1.1   Ks  1.01
 20:51 kosmos   455(  586)  61  55   1.1  0.6  1.5  0.6  0.8   --  1.01
 00:08 shack   400( 1252) 147  58   2.4  0.6  1.6  1.1  1.6   --  1.40
 02:07 ecamera    463( -404)  91  51   2.2  0.6  1.6  0.9  1.4   --  1.21


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

                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    43    -4     15   210  (SSW)    958    clear     none 
     17:00    39    -8     20   266    (W)   1078    clear     none 
     18:00    37    -5     10   265    (W)    900 mstly clr    none 
     19:00    35    -5      7   259    (W)    879 mstly clr    none 
     20:00    35    -1     11   284  (WNW)    995 mstly clr    none 
     21:00    34    -1     13   321   (NW)    940 mstly clr    none 
     22:00    34    -3      3   329  (NNW)    718  ptly cldy   none 
     23:00    34    -4      9     9    (N)    689  ptly cldy   none 
     00:00    36    -2     14   280    (W)    810 mstly cldy   none 
     01:00    36    -1      9   264    (W)    808 mstly cldy   none 
     02:00    36     0      6   295  (WNW)    773 mstly cldy   none 
     03:00    31    -2     11    78  (ENE)    754 mstly cldy   none 
     04:00    31     1      3   104  (ESE)    818 mstly cldy   none 
     05:00    29     2     18    86    (E)   1132  ptly cldy   none 
     06:00    28     5     11    97    (E)    414  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