Subject: 3.5m Night Log 20200724
From: mcmillan@apo.nmsu.edu
Date: Sat, 25 Jul 2020 10:46:47 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, July 24, 2020
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
NM01  E.Dahl            E.Dahl,R.Hull
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM01  NAIC           --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM01/R      20:16  06:04   6.8  3.0   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
We had clouds, rain, and fog all night long.  For a few hours, the weather radar for both El Paso and Holloman AFB went absent without explanation.  But it really was not hard to discern that weather was unsafe even without radar.  And then the radar came back and confirmed that guess.
                    ------- 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    65    35     15   210  (SSW)    621 mstly cldy   none
     17:00    67    38     13   178    (S)    709   cloudy     rain
     18:00    67    38     20   203  (SSW)    739   cloudy     rain
     19:00    63    34     10   124   (SE)    790   cloudy     none
     20:00    56    30     17   147  (SSE)          cloudy     none
     21:00    54    29     16   193  (SSW)          cloudy     rain
     22:00    53    29      7   197  (SSW)          cloudy     rain
     23:00    52    30     14   176    (S)          cloudy     rain
     00:00    51    28     18   119  (ESE)          cloudy     rain
     01:00    51    28     17   107  (ESE)          cloudy   lt rain
     02:00    52    29     18   153  (SSE)          cloudy   lt rain
     03:00    52    29     23   168  (SSE)          cloudy   lt rain
     04:00    55    30     22   164  (SSE)          cloudy    humid
     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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