Subject: 3.5m Night Log 20230315
From: ajt@apo.nmsu.edu
Date: Thu, 16 Mar 2023 10:25:32 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, March 15, 2023
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
GS01  D.Crenshaw        J.Falcone,G.Polack
JH06  K.Schlaufman      K.Schlaufman
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
GS01  KOSMOS         --:--   --:--
JH06  ECHELLE        --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
GS01/R      19:20  01:10   5.8   0    0    0   0.0  0.0   0    0
JH06/R      01:10  07:04   2.5  3.4   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
We did not open at all tonight. It was completely overcast all night with precipitation and fog; we had some rain starting 18:00, which didn’t last too long, but the clouds and radar stuck around. We got more rain after midnight with added fog. By 03:00 we had a wintry mix of snow, sleet, rain and fog with over 40mph winds.
It was 7C with about 40% at the start of the night, 2C and 93% humidity by 01:00, and a little over freezing with almost 100% humidity by 04:00.
No telescope or instrument problems.
                    ------- 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
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               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00                 27   256  (WSW)   1012   cloudy     none
     17:00                 22   263    (W)   1209   cloudy     none
     18:00                 25   259    (W)   1254   cloudy   lt rain
     19:00                 23   261    (W)   2725   cloudy     none
     20:00                 28   250  (WSW)   1074   cloudy     none
     21:00                 18   278    (W)    467   cloudy     none
     22:00                 19   275    (W)    524   cloudy     none
     23:00                 16   244  (WSW)    583   cloudy     none
     00:00                 20   251  (WSW)    613   cloudy   lt rain
     01:00                 17   278    (W)          cloudy   lt rain
     02:00                 19   266    (W)          cloudy   lt rain
     03:00                 44   238  (WSW)          cloudy   lt snow
     04:00                 33   267    (W)          cloudy   lt snow
     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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