Subject: 3.5m Night Log 20201004
From: mcmillan@apo.nmsu.edu
Date: Mon,  5 Oct 2020 13:05:47 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, October 04, 2020
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
OU01  J.Wisniewski      J.Wisniewski,S.Mahadevan,G.Stefansson,
                        S.Kanodia,M.Maney
EN01  B.Ketzeback       R.McMillan
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU01  ARCTIC         18:50   01:03
EN01  NA2GDR         01:10   01:33
EN01  ECHELLE        01:35   01:55
EN01  APOLLO         02:00   02:12
EN01  AGILE          02:15   02:38
EN01  DIS            02:41   05:25
EN01  NA2GDR         05:27   06:15
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU01/R      18:52  01:10    0    0    0    0   1.6  4.7   0    0
EN01/W      01:10  06:52    0    0    0    0   0.0  5.7   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
We had another beautiful clear night, with good seeing during first half but unstable seeing (which unfortunately I didn't record) during second half.  The first half observers got some excellent data despite several altitude tracking errors which occured both before and after - but not during - the event they wanted to catch.
During second half I did a more sophisticated correction of the pointing problem that cropped up last month after the tertiary mirror got stuck, and I also checked out DIS.  The blue side is currently looking quite nice, so here's hoping it remains that way!
                    ------- 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
--------------------------------------------------------------------------
 19:25 arctic   538( 1193) 239  82  12.6 15.2 14.8 14.3 13.2   SDSS_i  0.96
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    63    25     10   248  (WSW)   2100    clear     none
     17:00    61    25      8   226   (SW)   1991    clear     none
     18:00    59    23      6   210  (SSW)   1976    clear     none
     19:00    55    26      7   184    (S)   2183    clear     none
     20:00    54    28      7   161  (SSE)   2194    clear     none
     21:00    55    21      7   180    (S)   1719    clear     none
     22:00    53    31      9   184    (S)   1899    clear     none
     23:00    52    31     10   180    (S)   2050    clear     none
     00:00    52    27      5   188    (S)   1514    clear     none
     01:00    54    28      8   191    (S)   1499    clear     none
     02:00    53    27      7   191    (S)   1558    clear     none
     03:00    54    26      7   186    (S)   1668    clear     none
     04:00    53    24      8   245  (WSW)   1778    clear     none
     05:00    51    27      5   237  (WSW)   1807    clear     none
     06:00    53    27      6   227   (SW)   1763    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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