Subject: 3.5m Night Log 20191027
From: trudyk@apo.nmsu.edu
Date: Mon, 28 Oct 2019 12:47:14 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, October 27, 2019
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
NM01  J.Holtzman        Jon and students
JH06  K.Hawkins         K.Hawkins
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM01  Eyepiece       18:50   20:30
NM01  Arctic         20:30   23:46
NM01  Echelle        23:46   01:16
JH06  ECHELLE        01:20   06:15
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM01/O      18:26  01:10    0    0    0    0   6.7  0.1   0    0
JH06/R      01:10  07:09    0    0    0    0   6.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Rudyk
Another clear night. Seeing was decent, then a bad spell, then back to decent. Around 02:00 winds began to pick up and seeing degraded. Wind began to edge toward limits, and we had to institute a partial ban on objects to the south of us. Clouds began to blow in around 04:00. Clouds continued to thicken, but with no danger of rain, we stayed open until twilight.
                    ------- 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
--------------------------------------------------------------------------
 21:59 arctic   440(  771)  73  48   7.8  7.9  8.5  7.9  8.1   SDSS_r  2.23
 23:42 arctic   494(  794) -75  45   7.1  7.2  7.8  7.2  7.1   SDSS_r  1.64
 23:56 ecamera    446( -365) -47  54   7.3  7.1  7.7  7.1  7.2   clear  1.05
 01:22 ecamera    420( -435) 157  53   6.3  6.2  6.8  6.0  6.1   clear  1.36
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    54    18     12   262    (W)    681    clear     none
     17:00    54    20     14   211  (SSW)    795    clear     none
     18:00    49    18     18   243  (WSW)    854    clear     none
     19:00    47    16     18   216   (SW)           clear     none
     20:00    48    15     24   216   (SW)           clear     none
     21:00    48    15     23   214   (SW)           clear     none
     22:00    46    17     26   213  (SSW)           clear     none
     23:00    46    20     20   215   (SW)   1924    clear     none
     00:00    45    20     21   213  (SSW)   1356    clear     none
     01:00    43    23     18   202  (SSW)   1214    clear     none
     02:00    43    26     30   207  (SSW)   1009    clear     none
     03:00    42    27     24   193  (SSW)    986    clear     none
     04:00    40    28     29   206  (SSW)   1101 mstly clr    none
     05:00    40    29     27   210  (SSW)    995  ptly cldy   none
     06:00    41    30     27   200  (SSW)    982 mstly 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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