Subject: 3.5m Night Log 20201003
From: cgray@apo.nmsu.edu
Date: Sun,  4 Oct 2020 13:27:32 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, October 03, 2020
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
GS02  S.Lepine          N.Hejazi
UV02  R.Wilson          R.Wilson
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
GS02  ECHELLE        18:53   01:10
UV02  ECHELLE        01:10   06:25
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
GS02/R      18:53  01:10    0    0    0    0   1.1  5.2   0    0
UV02/R      01:10  06:51    0    0    0    0   0.0  5.7   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
While the night was clear, the seeing was terrible during A half. We had a easterly wind that dropped the temperature and increased the seeing to over 3". It took me a solid 10 min just to even determine what was close to focused. At 21:22 we had a tracking error at az=35, alt=68. I did a short slew to correct for it and we didn't have any other issues the rest of the night.
Once the winds died down and the temperature came back up, seeing greatly improved.
                    ------- 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
--------------------------------------------------------------------------
 19:34 ecamera    875(  203)  96  59   8.9 10.1 11.1  9.7  9.1   ND1  3.19
 21:06 ecamera    485( -292)  47  68   7.6  8.0  9.1  7.7  7.6   Clear  2.25
 01:18 ecamera    491( -172) -60  73  12.1 10.5 11.3 10.5 11.8   ND2  1.09
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    65    18     11   288  (WNW)   1068    clear     none
     17:00    61    15      5   279    (W)   1120    clear     none
     18:00    56    28      9    85    (E)   3074    clear     none
     19:00    50    28     18    80    (E)   2862    clear     none
     20:00    47    29     23    68  (ENE)   2569    clear     none
     21:00    46    28     17    76  (ENE)   2400    clear     none
     22:00    49    25      3   106  (ESE)   2370    clear     none
     23:00    53    22      1   207  (SSW)   2155    clear     none
     00:00    54    21      3   102  (ESE)   2112    clear     none
     01:00    53    11     10    86    (E)   1686    clear     none
     02:00    55    12      2   108  (ESE)   1407    clear     none
     03:00    54    10      6    92    (E)   1512    clear     none
     04:00    54    10      1   162  (SSE)   1517    clear     none
     05:00    55    11      1   168  (SSE)   1542    clear     none
     06:00    56    11      1   221   (SW)   1541    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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