Subject: 3.5m Night Log 20230413
From: mcmillan@apo.nmsu.edu
Date: Fri, 14 Apr 2023 12:59:55 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, April 13, 2023
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
NM03  S.Ho              S.Ho
OU01  M.Kilic           M.Kilic, class
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM03  KOSMOS         21:57   01:07
OU01  TSPEC          01:12   05:45
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM03/R      19:40  01:10   2.3   0    0    0   3.2  0.0   0    0
OU01/R      01:10  06:27    0    0    0    0   2.2  3.1   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
We had threatening radar (but not sprinkles this time) and heavy clouds at sunset.  When the radar was gone and the clouds thinned a little, we tried going on sky.  It was a bit of a struggle, but the first half observer did get usable data.
On the switch to second half the clouds disappeared.  And then came back later along with teasing dust and winds, but it never got bad enough to force us to close.  Everything worked well.
                    ------- 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
--------------------------------------------------------------------------
 22:05 kosmos   250(  709) 188  76  10.0  9.9 10.2  9.7  8.6   -  1.31
 01:17 kosmos   512(  795) 217  56  10.0  6.0  6.9  5.8  5.7   -  1.08
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00                 30   219   (SW)   1268  ptly cldy   none
     17:00                 15   261    (W)   1088 mstly clr    none
     18:00                 25   266    (W)   1152 mstly clr    none
     19:00                 14   224   (SW)   1287  ptly cldy   none
     20:00                 20   251  (WSW)   1223 mstly cldy   none
     21:00                 20   253  (WSW)   1501  ptly cldy   none
     22:00                 23   268    (W)   1175  ptly cldy   none
     23:00                 19   262    (W)   1166  ptly cldy   none
     00:00                 24   266    (W)   1092  ptly cldy   none
     01:00                 24   276    (W)   1566    clear     none
     02:00                 14   263    (W)   2004    clear     none
     03:00                 13   264    (W)   3141    clear     none
     04:00                 18   265    (W)   2537  ptly cldy   none
     05:00                 19   267    (W)   3416  ptly cldy   dust
     06:00                 23   274    (W)   3122  ptly cldy   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.
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