Subject: 3.5m Night Log 20190526
From: decolib@apo.nmsu.edu
Date: Mon, 27 May 2019 11:56:01 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, May 26, 2019
                                                           ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
--------------------------------------------------------------------
M.Skrutskie       O.Fox                 TSpec          20:14   00:47
K.Schlaufman      K.Schlaufman          ECHELLE        00:54   03:30
K.Schlaufman      K.Schlaufman          Echelle        04:20   05:24
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 ----------------------------------------------------------------
UV04/R     20:11   01:10    0    0    0    0   5.0  0.0   0    0
JH01/R     01:10   05:49    0    0.8  0    0   1.1  2.8   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: D.DeColibus
Afternoon checkout started with very high dust counts, >44000 in the 1 micron, and high winds. Had to replace the LN2 tanks for TSpec and NICFPS, which made three this weekend after the Echelle tank yesterday.
Dust was down to 'borderline safe' of ~5000 by sunset, and with low humidity and the decreasing trend we decided to open.
Pollen levels didn't seem high enough to close, but we took precautions with keeping the louvers closed/pressurisation fan on/intex fan off/stairwell closed.
Closed at 3:30 because we were pointing directly into the wind, reopened at 4:20.
The night was otherwise uneventful.
                    ------- 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
--------------------------------------------------------------------------
 19:23 tcamera    671( 1507) 241  57  12.4 14.3 14.8 14.2 13.0   Ks  1.15
 23:58 ecamera    544(    0)  24  74   9.6 10.0 10.8 10.0  9.8   Clear  0.96
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    54    29     26   237  (WSW)   9733    clear     dust
     17:00    60    27     21   229   (SW)  15305    clear     dust
     18:00    61    18     36   266    (W)  27026    clear     dust
     19:00    58    15     25   256  (WSW)   7399    clear     dust
     20:00    55    12     19   264    (W)   5395    clear     none
     21:00    53    10     18   263    (W)   3566    clear     none
     22:00    53    11     18   263    (W)   2006    clear     none
     23:00    52     9     17   268    (W)   1344    clear     none
     00:00    51     9     15   256  (WSW)    849    clear     none
     01:00    50     8     15   261    (W)    486    clear     none
     02:00    48    10     18   261    (W)    442    clear     none
     03:00    47    15     18   262    (W)    487    clear     none
     04:00    48    17     20   257  (WSW)    639    clear     none
     05:00    46    19     19   248  (WSW)    485    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