Subject: 3.5m Night Log 20200711
From: mcmillan@apo.nmsu.edu
Date: Sun, 12 Jul 2020 12:12:03 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, July 11, 2020
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
EN02  B.Ketzeback       R.McMillan
NM03  S.Kovac           S.Kovac
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
EN02  ARCTIC         20:45   21:00
EN02  Guider         21:05   23:00
EN02  ARCTIC         23:00   03:55
NM03  Echelle        04:03   05:56
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
EN02/R      20:22  03:33    0    0    0    0   4.1  3.1   0    0
NM03/R      03:33  05:56    0    0    0    0   0.0  2.4   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
Clouds at the start and end of the night, but a long stretch of photometric weather in the middle of the night.  I tested collimation vs pointing (inconclusive for the effect we were looking for), then got lots of throughput data, then handed over to Venus observations.
I had a little trouble with the automated night log script, so a lot of this was done by hand.
During the switch to echelle, a clamp failure caused a two-minute delay.  Simple to correct, but disturbing since we just addressed this last month.  So that may need further investigation.
Tomorrow will hopefully be testing of ARCTIC flats, and lots more pointing!
                    ------- 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
--------------------------------------------------------------------------
 21:15 guider   678( 1726)  50  65  22.2 23.4 23.9 22.9 22.6   B  1.06
 23:09 arctic   638( 1616) -30  64  21.5 21.9 22.8 21.7 21.6   SDSS_i  0.89
 04:10 ecamera    459(  233)  72  61  19.3 19.6 20.5 19.5 19.3   ND2  0.84
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    82    37      3   299  (WNW)   1341  ptly cldy   none
     17:00    76    39      6    68  (ENE)   1251  ptly cldy   none
     18:00    73    37      3    66  (ENE)   1168  ptly cldy   none
     19:00    77    41      2   195  (SSW)   1118  ptly cldy   none
     20:00    76    40      2   224   (SW)   1183  ptly cldy   none
     21:00    73    37     12   131   (SE)   1196 mstly clr    none
     22:00    73    36     15   161  (SSE)   1220 mstly clr    none
     23:00    71    35     22   146   (SE)   1212 mstly clr    none
     00:00    70    33     19   153  (SSE)   1022    clear     none
     01:00    70    32     17   168  (SSE)   1066    clear     none
     02:00    69    35     18   181    (S)   1169    clear     none
     03:00    69    37     12   190    (S)    985    clear     none
     04:00    67    37     17   219   (SW)   1022 mstly clr    none
     05:00    65    35     17   207  (SSW)    877  ptly cldy   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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