Subject: 3.5m Night Log 20210601
From: cgray@apo.nmsu.edu
Date: Wed,  2 Jun 2021 11:42:01 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, June 01, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
OU05  J.Choi            J.Choi
CU01  W.Waalkes         W.Waalkes, Z.Berta-Thompson, J.Libby-Roberts
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
OU05  DIS            --:--   --:--
CU01  ARCTIC         00:22   05:35
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
OU05/R      20:15  00:00   3.8  0.0   0    0    0    0    0    0
CU01/R      00:00  05:47   0.4    0   0    0   1.5  3.9   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
during check out, when slewing down from 80 to 12 deg, there was there was an alt motion error at 21.9.
00:10:37 APO.Dome: 2021-06-02 00:09:58 .tcc.0 0 tcc w BadAltStatus; AltStat=21.946796,0.000280,5129309398.60000,0x0c006001; AltDTime=0.13
I reinitialized the axes and did several more slews between 10 and 80 deg and there were no large altitude corrections from the magnesensors nor were there any further motion errors. I did see small oscillations while taking sky flats at dawn at 255, 60 but, for the most part, I saw little to no oscillations all night.
The night started out with rain and clouds. Things finally blew out around midnight and we were able to open for second half with good seeing.
                    ------- 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
--------------------------------------------------------------------------
 00:30 arctic   477(  962) 173  52  12.3 11.3 11.4 11.2 11.6   sdss-i  1.07
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    65    32     13   239  (WSW)         ptly cldy   none
     17:00    58    27      9   268    (W)         ptly cldy   none
     18:00    57    31      9   263    (W)        mstly cldy   none
     19:00    52    32     10   263    (W)          cloudy   lt rain
     20:00    50    31     15   182    (S)        mstly cldy   none
     21:00    50    32      5   191    (S)        mstly cldy   none
     22:00    52    30      4   256  (WSW)        mstly cldy   none
     23:00    54    27      5   317   (NW)         ptly cldy   none
     00:00    53    26      6   344  (NNW)        mstly clr    none
     01:00    54    27     10   272    (W)        mstly clr    none
     02:00    54    26      6   267    (W)         ptly cldy   none
     03:00    54    26      4   259    (W)         ptly cldy   none
     04:00    50    29      3   211  (SSW)         ptly cldy   none
     05:00    48    28     10    68  (ENE)        mstly clr    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 SOFTWARE  ----------
Current TCC version: 1.4.2
Current HUB version: v20171231_01
Current TUI version: 2.6.0