From:
Subject: 3.5m Night Log 20100221
Date: Mon, 22 Feb 2010 13:00:35 +0000 (UTC)
                       Apache Point Observatory
                       3.5m Telescope Night Log
                      Sunday, February 21, 2010
                                                       ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
 --------------------------------------------------------------------
 J.Rogers        J.Rogers               NICFPS         21:10  22:10
 M.Gladders      E.Wuyts                NICFPS         --:--  --:--
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 --------------------------------------------------------------------
 JH06/R    18:02   00:10    0   5.1   0    0    0   1.0   0    0
 UC02/R    00:10   06:31   5.0  1.3   0    0    0    0    0    0
 note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
 Observing Specialist:  R.McMillan
 The night started with thick, low clouds, borderline humidity, and
 an unpromising forecast.  A few holes in the clouds took us for
 suckers, but eventually thinner high clouds lasted longer and I
 opened the dome.  Seeing was quite bad at first, probably because I
 had not been running the fans before opening due to uncertain
 humidity.  As the telescope cooled, the seeing improved to about 1
 arcsec even as the clouds were getting thicker again.  When we lost
 guiding and I judged the clouds would be sticking around, we closed.
 The observer said his data would be useful despite the clouds.
 DIS was on the instrument pump, but it couldn't keep running while
 the dome was open; after we closed, it took me about an hour
 to get the pump going again.
 Second half there was another sucker hole that I almost fell for,
 but I kept waiting for one more cloudcam image and it kept not
 improving the way I thought it would, until finally we had overcast
 skies and humidity over the limit.  It stayed that way for the
 remainder of the night, but we didn't see any snow... yet.
 Triplespec is functional again and taking spectra.
 When I parked the telescope, I got altitude overcurrent messages on
 two slews; I left the telescope parked in azimuth but not in
 altitude until the reason for the overcurrents can be figured out.
                    ------- 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
 --------------------------------------------------------------------------
 21:19 NICFPS   250(  375) -15  53  -3.8 -1.8 -0.7 -2.6 -2.7   J     1.60
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    31    19     15   267    (W)    309 mstly cldy   none
     17:00    28    19     28   275    (W)    488 mstly cldy   none
     18:00    28    20     18   265    (W)    362 mstly cldy   none
     19:00    26    20     20   253  (WSW)    411 mstly cldy   none
     20:00    26    18     18   261    (W)    432  ptly cldy   none
     21:00    25    17     18   268    (W)    331  ptly cldy   none
     22:00    25    16     14   266    (W)    349 mstly cldy   none
     23:00    25    18     18   266    (W)    511 mstly cldy   none
     00:00    25    20     20   273    (W)    857 mstly cldy   none
     01:00    24    19     12   261    (W)    826 mstly cldy   none
     02:00    24    21     19   269    (W)   1272  ptly cldy   none
     03:00    24    20     21   265    (W)    723   cloudy    humid
     04:00    22    20     15   274    (W)    732   cloudy    humid
     05:00    23    21     15   264    (W)    739   cloudy    humid
     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: 2.11.1
    Current TUI version: 1.7.0