Date: Fri, 25 Apr 2008 04:34:13 -0600 (MDT)
From: Jack Dembicky
Subject: 3.5m Night Log 20080424
                        Apache Point Observatory
                        3.5m Telescope Night Log
                        Thursday, April 24, 2008
                                                         ACTUAL
 ASTRONOMER      OBSERVER(S)             INSTRUMENT    START  FINISH
 -------------------------------------------------------------------
 J.Wilson        J.Wilson, J.Leisenring  TSpec         --:--  --:--
                 S.Schmidt
 T.Murphy        R.McMillan              APOLLO        --:--  --:--
 M.Gladders      M.Gladders, E.Wuyts     NICFPS
                 M.Bayliss
   INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 UV/O     20:36  05:26    0    0    0    0   2.5  6.4    0    0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialists: J. Dembicky
 AZ  velocity scale measured 591.5, File 589.0
 Alt velocity scal measured -636.3, File -638.0
FYI Bill, the comment line in the AltVelocityScale script says it's the Az
(not Alt) velocity scale.  The rest of the script is correct for the alt.
Dust kept us closed all night.
UW ran some slitview image speed test on tcam.  I ran some dome closed
tracking test to watch the dataq for signs of "slippage".  Can you say
watch paint dry?
Watching for slippage I saw it at the following times runnning dome closed
and tracking an object.
Telescope Az 22.9 Alt 72.1 (boresight guiding on)
06:08:29 (plus or minus 30 sec) - small but definately looked like a slip
Telescope Az 13.1 Alt 72.7 (boresight guiding on)
06:21:55 big slip, time +/-2sec
Telescope 11.2(?) 72.7(?) (no guider running)
HA -0:13 (ish) Dec 15:45
6:23:45 squiggle
06:32:45 Az 4.6 Alt 73  HA -0:05:26  Dec +15:45:18  Slip (no guiding)
Russet saw some error flag trip when the larger slips did occur.  She felt
it was probably more hardware than software related.
With the dust levels over 9000 cts my observers gave up at 04:30.
                       ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
      (SAEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
               ---------------- FOCUS LOG ---------------
 Time  Instrument  Focus    Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
 -----------------------------------------------------------------------
                ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     16:00    59    15     19   254  (WSW)   5221    clear     dust
     17:00    58    13     34   248  (WSW)   5249    clear     dust
     18:00    57    12     33   255  (WSW)   6509    clear     dust
     19:00    55    10     23   267    (W)   6922    clear     dust
     20:00    51     7     20   259    (W)   7114    clear     dust
     21:00    50     6     23   269    (W)   6349    clear     dust
     22:00    48     7     22   275    (W)   6668    clear     dust
     23:00    48     8     18   286  (WNW)   6250    clear     dust
     00:00    46     6     13   282  (WNW)   7330    clear     dust
     01:00    46     5     18   286  (WNW)   6995    clear     dust
     02:00    44     6     19   302  (WNW)   7129    clear     dust
     03:00    42     7     12   316   (NW)   8786    clear     dust
     04:00    41    10     11   322   (NW)   9649    clear     dust
     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: 2.9.1
      Current TUI version: TUI 1.4.5