Subject: 3.5m Night Log 20210423
From: mcmillan@apo.nmsu.edu
Date: Sat, 24 Apr 2021 23:50:42 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, April 23, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
WY02  A.Cavanaugh       A.Cavanaugh
AP01  S.Merkowitz       R.McMillan
WY01  J.McLane          J.McLane
UV04  R.Wilson          R.Wilson
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WY02  TSPEC          20:08   00:02
AP01  APOLLO         00:04   01:08
WY01  TSPEC          01:11   02:37
UV04  EHELLE         02:43   06:05
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WY02/R      19:48  00:10    0   0.3   0    0   0.0  4.1   0    0
AP01/R      00:10  01:10    0    0    0    0   0.0  1.0   0    0
WY01/R      01:10  02:40    0    0    0    0   0.0  1.5   0    0
UV04/R      02:40  06:14    0    0    0    0   1.1  2.4   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
Low clouds with associated precipitation just before sunset cleared up surprisingly fast, and we were able to open during twilight.  After that, the night was clear with good seeing and no problems.  APOLLO got good signal.
                    ------- 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
--------------------------------------------------------------------------
 20:16 tcamera    523(  989)  68  35   4.8  6.3  6.5  6.2  4.9   Ks  1.08
 01:21 tcamera    450(  801) -167  68   5.0  4.3  4.9  4.3  4.6   Ks  1.08
 02:50 ecamera    428( -534) -96  47   4.2  3.8  4.4  3.6  4.0   Clr  0.78
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    45    15     13   273    (W)   3592   cloudy     none
     17:00    45    16     20   271    (W)   3692 mstly cldy lt rain
     18:00    42    19     17   301  (WNW)   2405 mstly cldy   none
     19:00    42    17     14   272    (W)   2313  ptly cldy   none
     20:00    41    17      9   291  (WNW)   1706  ptly cldy   none
     21:00    41    16     13   285  (WNW)   1608  ptly cldy   none
     22:00    42    15     20   291  (WNW)   1645  ptly cldy   none
     23:00    41    16     10   264    (W)   1665  ptly cldy   none
     00:00    40    17      6   283  (WNW)   1632  ptly cldy   none
     01:00    41    16      7   261    (W)   1830  ptly cldy   none
     02:00    40    16      5   258  (WSW)   1551  ptly cldy   none
     03:00    40    17      5   268    (W)   1496  ptly cldy   none
     04:00    40    17      5   355    (N)   1301  ptly cldy   none
     05:00    39    17      7    11    (N)   1499  ptly cldy   none
     06:00    40    16      8   344  (NNW)   1537  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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Current HUB version: v20171231_01
Current TUI version: 2.6.0