Date: Tue, 20 May 2008 05:40:00 -0600 (MDT)
From: Jack Dembicky
Subject: 3.5m Night Log 20080519
                        Apache Point Observatory
                        3.5m Telescope Night Log
                         Monday, May 19, 2008
                                                         ACTUAL
 ASTRONOMER      OBSERVER(S)             INSTRUMENT    START  FINISH
 -------------------------------------------------------------------
 M.Klaene    J.Dembicky, R.McMillan      SPIcam, S-H  20:00   05:00
   INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 EN01/R     20:59  05:00    0    0    0    0    0   8.0   0    0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialists: J. Dembicky, R.McMillan
 Zero'ed rotator, off by -0.498
 AZ  velocity scale measured 579.9,  File 574.0, Changed to 580.0 (20:50)
 ALT velocity scale measured -634.5, File -636.0, Changed --
 Autofocus comments:  We do have some evidence that the guider vs. inst
 focus diff changes when telex fan state changes.  Since we usually try
 not to change telex fans states during observing this shouldn't be a show
 stopper but if we do need to change state (dust, etc) then we need to be
 aware to not rely on autofocus in this case.
 07:33:43 Alt/Az drives stopped for no apparent reason (time ran out on an
 interpolated move, Russet looked up the error code)
 I ran some more tests on the autofocus script (turn fans on/off, move
 focus and see if sec. autofocus moves back to optimal focus.  This test
 also confirmed that autofocus was moving us to (near) best focus values).
 I then ran an 80 point pointing model and implemented the new model.
 I then did several tertiary rotations to look for problems seen this past
 weekend.  Didn't see any problems.
                       ------- 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
 -----------------------------------------------------------------------
 21:08 SPIcam     222(985)  52  71  17.1 18.8 18.4 17.7 17.2    I   1.10
 21:24 SPIcam     206(955)  42  74  16.9 18.4 18.3 17.1 17.1    I   0.89
 21:34 NA2gdr  -396(30000)  34  75  16.9 18.3 18.3 16.9 17.0  clear 1.05
 11:25 S-H      -225(1016) -56  60  17.8 17.1 17.5 15.9 16.9    --  1.0
 00:46 SPIcam     -92(574)  26  76  17.4 16.7 17.1 15.5 16.9    I   0.71
 00:51 NA2gdr   -74(30000)  21  76  17.2 16.7 17.1 15.5 16.8  clear 0.78
                ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     18:00    68    20     14   304   (NW)   1548  lt. cirrus  none
     19:00    67    19      5   270    (W)   1495  lt. cirrus  none
     20:00    64    15      6   341  (NNW)   1256  lt. cirrus  none
     21:00    63    16      2     0    (N)   1214  lt. cirrus  none
     22:00    60    15      6     5    (N)   1154  lt. cirrus  none
     23:00    63    15      9    11    (N)   1257  lt. cirrus  none
     00:00    64    16     11    57  (ENE)   1289  lt. cirrus  none
     01:00    63    16      1   240  (WSW)   1200  lt. cirrus  none
     02:00    63    15      4   189    (S)   1234  lt. cirrus  none
     03:00    62    15      3   201  (SSW)   1447  lt. cirrus  none
     04:00    62    18      2   219   (SW)   1622  lt. cirrus  none
     05:00    62    15      1   231   (SW)   1283  lt. cirrus  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: 2.9.1
      Current TUI version: TUI 1.4.5