Subject: 3.5m Night Log 20181019
From: cgray@apo.nmsu.edu
Date: Sat, 20 Oct 2018 11:32:01 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, October 19, 2018
                                                           ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
--------------------------------------------------------------------
D.Chojnowski      D.Chojnowski          ECHELLE        --:--   --:--
T.Thuan           Y.Izotov              TripleSpec     22:45   00:15
K.Allers          K.Allers              TripleSpec     --:--   --:--
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 ----------------------------------------------------------------
NM01/R     18:34   19:34    0    0    0    0   0.0  1.0   0    0
UV02/R     19:34   01:10    0   4.1   0    0   0.0  1.5   0    0
NA02/R     01:10   07:03    0    0    0    0   3.8  2.1   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
The fog was beautiful for hiking!  Not so beautiful for observing.  I began the night to find part of the primary mirror was covered in condensation.  When was the last time we had a dry day? I left the mirror covers open while I did dome duties and after about 30 min the mirror looked fine.
Humidity dropped below 80% a few hours after sunset and we were able to stay open for 1.5 hrs. Now, we didn't get any good data mind you, seeing was 2.25", but we were at least open.  UV02 gave up due to clouds at 00:15.  I took the opportunity to let our NM02 trainee take control and hit some echelle buttons before fully closing.
Humidity dropped below 80% after midnight but the wind was screaming and we couldn't reopen.  I left the dome parked west as I fear a collision if I tried to move it into the easterly winds.
                    ------- FAILURE LOG -------
PROG   INST   FAILURE MODE     TIME
    (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
----------------------------------------------------------------------
            ---------------- FOCUS LOG ---------------
Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
--------------------------------------------------------------------------
 21:51 tcamera    654( 1002) 330  53   5.2  8.7 10.3  8.1  6.1   Ks  2.25
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    51    31      1   271    (W)          cloudy     fog
     17:00    49    32      7    82    (E)          cloudy     fog
     18:00    46    31     16    80    (E)          cloudy     fog
     19:00    44    31     20    67  (ENE)        mstly cldy   fog
     20:00    43    31     15    74  (ENE)         ptly cldy  humid
     21:00    42    31     27    72  (ENE)         ptly cldy  humid
     22:00    41    31     21    78  (ENE)        mstly clr    none
     23:00    41    30     27    71  (ENE)     16  ptly cldy  humid
     00:00    41    30     29    75  (ENE)        mstly cldy  humid
     01:00    41    31     20    82    (E)         ptly cldy  humid
     02:00    40    31     27    73  (ENE)        mstly clr   humid
     03:00    40    31     20    83    (E)        mstly clr   humid
     04:00    40    31     30    73  (ENE)     13    clear     none
     05:00    40    29     34    72  (ENE)           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.
                          TELESCOPE STATUS
    Telescope drives operational. Current TCC version: 1.2.4
    Current TUI version: 2.6.0