Subject: 3.5m Night Log 20230119
From: ajt@apo.nmsu.edu
Date: Fri, 20 Jan 2023 12:43:16 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, January 19, 2023
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
BY02  M.Joner           M.Joner,B.Boizelle
NM01  K.Sanderson       K.Sanderson
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
BY02  KOSMOS         18:23   19:28
NM01  KOSMOS         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
BY02/R      17:32  00:10  4.6    0    0    0   2.0  0.0   0    0
NM01/R      00:10  06:56  6.0  0.8    0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
BY02 used twilight for in-dome cals with KOMSOS.
KOSMOS calstage reading position 19941 when commanded in instead of 20200, so I homed it before continuing, afterwards it read 20200 when in.
Closed at 19:30 due to wind gusts > 15mph limit due to ice and snow still stuck to the dome. The winds stayed too high for the rest of the night. We gave up at 05:00 when there wouldn't be enough time left before twilight for NM01 to get data.
Temperatures started at -1C in the afternoon and fell to -3C after sunset, where they stayed. Humidity Dropped from 55% to 15% and then went back up to about 50% after midnight.
                    ------- 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
--------------------------------------------------------------------------
 18:38 khigh   325(  246) 233  82  10.0 -1.5 -2.5 -2.3 -3.1   --  1.36
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00                  5   196  (SSW)    693  mstly clr   none
     17:00                  7   197  (SSW)   1320  mstly clr   none
     18:00                 10   208  (SSW)   1382  ptly cldy   none
     19:00                  9   189    (S)   1316  ptly cldy   none
     20:00                 16   203  (SSW)    870  ptly cldy   none
     21:00                 16   198  (SSW)    323  ptly cldy   none
     22:00                 14   207  (SSW)    284  ptly cldy   none
     23:00                 12   231   (SW)    353    clear     none
     00:00                 15   211  (SSW)    490    clear     none
     01:00                 13   192  (SSW)    553    clear     none
     02:00                 19   182    (S)   1008    clear     none
     03:00                 21   179    (S)    965    clear     none
     04:00                 21   207  (SSW)   1012    clear     none
     05:00                 20   210  (SSW)    679    clear     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.
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