Subject: 3.5m Night Log 20210223
From: decolib@apo.nmsu.edu
Date: Wed, 24 Feb 2021 13:34:37 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, February 23, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
GS03  D.Gies            K.Shepard
OU03  J.Choi            J.Choi,D.Terndrup,K.Green,K.Leighly
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
GS03  ECHELLE        18:03   23:59
OU03  TripleSpec     00:05   06:22
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
GS03/R      18:04  00:10    0    0    0    0   0.0  6.1   0    0
OU03/R      00:10  06:28    0    0    0    0   1.4  4.9   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: D.DeColibus
AP01 had computer issues, and ceded their time to GS03; I took them off the scheduled portion above and added 1.0 hours to GS03's time. The winds were a little borderline at some points, but never high enough to close. We closed up around 06:30 AM.
We noticed an issue with the Echelle nurse tank losing weight between auto-fills, and last night it apparently was suffering temperature spikes at the same time as the fills (see PR 2003). Tonight it was still losing some weight between fills, but no temperature spikes. At the time we closed up, the dewar was at 243 and pressurized to 8 psi. Nothing looked out of the ordinary on either the afternoon or the morning inter-order light measurements.
                    ------- 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
--------------------------------------------------------------------------
 18:10 ecamera    559( -281) 227  31   5.3  6.1  6.3  5.4  5.4   ND3  1.25
 00:14 tcamera    427(  795)   6  80   4.4  4.8  5.4  4.8  4.6   Ks  1.09
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    47     1     17   280    (W)    188    clear     none
     17:00    46     1     14   255  (WSW)    242    clear     none
     18:00    41     1     15   256  (WSW)    296  ptly cldy   none
     19:00    41     0     24   239  (WSW)    553    clear     none
     20:00    42    -3     20   265    (W)    467    clear     none
     21:00    41    -3     23   280    (W)    288    clear     none
     22:00    42    -2     19   284  (WNW)    177    clear     none
     23:00    42    -3     19   291  (WNW)    158    clear     none
     00:00    41    -5     19   296  (WNW)    166    clear     none
     01:00    41    -6     17   275    (W)    133    clear     none
     02:00    40    -4     16   311   (NW)    150    clear     none
     03:00    39    -5     14   305   (NW)    261    clear     none
     04:00    38    -5     17   307   (NW)    265    clear     none
     05:00    38    -5     17   323   (NW)    176    clear     none
     06:00    39    -5     16   271    (W)    125    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.
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