Date: Tue, 16 Feb 2010 06:36:49 -0700 (MST)
Subject: 3.5m Night Log 20100215
From: "Jack Dembicky"
                        Apache Point Observatory
                        3.5m Telescope Night Log
                        Monday February 15, 2010
                                                         ACTUAL
 ASTRONOMER     OBSERVER(S)             INSTRUMENT    START  FINISH
 -------------------------------------------------------------------
 S.Anderson     A.Mukadam               AGILE         21:10   06:37
  PROG        SCHEDULED      WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH    D    B    D    B    D    B    D    B
 ------------------------------------------------------------------
 UW06/R     17:57  06:37     0    0   1.6  1.6  9.4   0    0    0
   note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialist: J.Dembicky
 I discovered a tracking problem when I went to focus tonight.  It took Fritz, Bill and Myself
about 3 hrs to track the problem down (after a couple wild goose chases that lead nowhere) and
Fritz getting it fixed.  Long story short, We had an error that wasn't being corrected for in
Altitude that was showing up as streaking in Azimuth in the images.  That and the Agile rotator
seemed to had broke free and free-wheeled (which was our first wild goose that we chased).
DIS blue ion pump was running higher than we normally see this morning. No problems otherwise and
pointing was good as well.
                ------------- FAILURE LOG --------------
  PROG   INST   FAILURE MODE     TIME
      (STEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
 UW06      V          T/S     17:57  21:10   Error in altitude corrections causing
                                             problems azimuth tracking.
               ---------------- FOCUS LOG ---------------
 Time  Instrument  Focus    Az  El  Temp Strc Prim  Sec  Air  filt FWHM
 -----------------------------------------------------------------------
 21:18 AGILE   125(-2490) 120  46  -3.9 -3.8 -3.8 -4.9 -4.2   BG40  1.10
                 ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     16:00    27    18      5   258  (WSW)    429  ptly cldy   none
     17:00    26    19      1   254  (WSW)    482  ptly cldy   none
     18:00    27    10      5   345  (NNW)    424  ptly cldy   none
     19:00    26    11      6   303  (WNW)    434  ptly cldy   none
     20:00    25     4      6   314   (NW)    323 mstly clr    none
     21:00    26    -3      6     2    (N)    280 mstly clr    none
     22:00    24    -2      3    13  (NNE)    303    clear     none
     23:00    26     8      1   326   (NW)    314    clear     none
     00:00    25     0      2   341  (NNW)    280    clear     none
     01:00    26    10      2   351    (N)    342    clear     none
     02:00    25     9      1   342  (NNW)    313    clear     none
     03:00    25     9      1   171    (S)    297    clear     none
     04:00    25     6      2   201  (SSW)    287 mstly clr    none
     05:00    24     7      3   185    (S)    315  ptly cldy   none
     06:00    22     7      4   193  (SSW)    365  ptly cldy   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: 2.11.1
      Current TUI version: 1.7.0