Subject: 3.5m Night Log 20211123
From: ajt@apo.nmsu.edu
Date: Wed, 24 Nov 2021 12:04:09 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, November 23, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
EN01  B.Ketzeback       R.McMillan,A.Townsend
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
EN01  KOSMOS         18:30   18:50
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
EN01/W      17:07  06:33  2.9  10.2  0    0   0.3  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
Not much usable sky tonight but we were able to use the 20 cloudy minutes we did get to check the KOSMOS slit masks and guiding on a very bright star.
For the rest of the night the radar was very threatening and the clouds were terrible, and we had a small amount of precipitation.
We had a few motion errors tonight (some induced) all in altitude while slewing downwards: at 17:38, 62.4 alt, and at 18:55 around 30 alt. The rest were part of the testing we decided to do (and happened around 20, 30, 60, and 70 alt). After that we lowered the max slew velocity and had no more
motion errors for the rest of the night.
Engineering tasks accomplished:
- Restarted hub and TCC
- Reset axis controllers and zeroed rotators
- Russet made masks for KOSMOS
- Tested KOSMOS slitviewer on-slit guiding and slit position
- Motion error tests and max slew velocity adjustment
- Looked into unoptimized kcam flatfielding
- Took KOSMOS data for gain/linearity/read noise
- Took KOSMOS data for sag measurements
I also added some tape to the current KOSMOS LN2 shield so that it will last a little longer.
Finished early due 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
--------------------------------------------------------------------------
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    48    32     12   241  (WSW)    619 mstly cldy   none
     17:00    44    32     14   242  (WSW)    823 mstly cldy   none
     18:00    43    31     13   257  (WSW)   1114 mstly cldy   none
     19:00    43    30     14   243  (WSW)   1675   cloudy     none
     20:00    43    30     20   272    (W)   1463   cloudy     none
     21:00    43    30     16   263    (W)   1917   cloudy     none
     22:00    43    29     15   264    (W)   2098   cloudy     rain
     23:00    43    28     20   262    (W)   1815   cloudy     none
     00:00    42    27     15   265    (W)   1639   cloudy     none
     01:00    40    26     13   259    (W)   3050   cloudy     none
     02:00    40    26     11   258  (WSW)   2953   cloudy     none
     03:00    39    24     15   259    (W)   2357   cloudy     none
     04:00    38    27     20   245  (WSW)   2378   cloudy     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: 2.6.0