Subject: 3.5m Night Log 20220901
From: ajt@apo.nmsu.edu
Date: Fri,  2 Sep 2022 12:39:42 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, September 01, 2022
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
AP01  S.Merkowitz       R.McMillan
GS02  D.Gies            K.Shepard
NM05  J.Burchett        J.Burchett,P.HolguinLuna
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
AP01  APOLLO         --:--   --:--
GS02  ECHELLE        22:20   01:40
NM05  KOSMOS         01:45   05:42
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
AP01/R      19:36  20:36    0   1.0   0    0   0.0  0.0   0    0
GS02/R      20:36  01:10    0   1.7   0    0   2.9  0.4   0    0
NM05/R      01:10  06:30    0    0    0    0   4.8  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
We played chicken with the humidity and clouds tonight, and opened at 22:20 with a warm telescope. Luckily as the telescope temperature dropped, the dewpoint stayed just low enough to keep us open.
NM05 donated an extra half an hour to GS02 at changeover due to getting a slow start, and finished at twilight.
I kept the intex fans off and the louvers closed due to the >75% humidity all night.
No telescope or instrument problems.
                    ------- 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
--------------------------------------------------------------------------
 22:24 ecamera    512(  115) 145  74  11.3 14.0 14.9 13.5 12.4   ND3  0.84
 02:02 kosmos   294(  809) 178  37  10.9 10.6 11.3 10.3 10.8   --  1.50
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    54    30      2   333  (NNW)          cloudy    humid
     17:00    57    30      1   239  (WSW)          cloudy     fog
     18:00    58    30      1   348  (NNW)    276   cloudy    humid
     19:00    56    30     15    47   (NE)        mstly cldy  humid
     20:00    54    32     12    57  (ENE)         ptly cldy  humid
     21:00    53    31     12    72  (ENE)         ptly cldy  humid
     22:00    53    31     13    74  (ENE)        mstly clr   humid
     23:00    53    31     13    88    (E)        mstly clr   humid
     00:00    52    30     13    79    (E)         ptly cldy  humid
     01:00    51    30     10    85    (E)         ptly cldy  humid
     02:00    52    30      3   105  (ESE)         ptly cldy  humid
     03:00    53    32      7    87    (E)         ptly cldy  humid
     04:00    53    31      7    84    (E)    192  ptly cldy   none
     05:00    53    31     11    80    (E)    207  ptly cldy   none
     06:00    52    31      8    84    (E)    190  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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