Date: Mon, 26 Nov 2007 12:45:53 -0000 (UTC)
Subject: 3.5m Night Log 20071125
From: "Gabrelle Saurage"
                        Apache Point Observatory
                        3.5m Telescope Night Log
                       Sunday, November 25th, 2007
                                                         ACTUAL
 ASTRONOMER     OBSERVER(S)             INSTRUMENT    START  FINISH
-------------------------------------------------------------------
 T.Harrison     T.Harrison              DIS           17:20  23:59
 A.Soderberg    A.Soderberg             SPICAM        00:15  04:55
   INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
---------------------------------------------------------------------
 NM06/R     17:55  00:05    0    0    0   0.1   0   6.1   0    0    0
 PU03/R     00:05  05:46    0   0.9   0    0    0   4.8   0    0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
Observing Specialists: G.Saurage
AzVelScales: 577.0, 581.5 avg 579.2 (changed to 579)
Clear and cold first half; cloudy and not-so-cold second. Seeing was
decent until the band of clouds moved in from the west around 23:00.
20:55 After a small slew in field where we had been tracking for almost an
hour, pointing seemed to be far off. I checked magnesensor errors and
found the ALT errors to be 12-13 arc minutes. We did a few large slews to
bring them back down to normal levels and then slewed back to the original
field to reacquire. Winds were fairly high (near 30mph) and we were sort
of facing into the wind (perhaps contributing to the large errors).
Pointing was fine after the slews but we lost about 10 minutes.
4:50 Clouds thickened after 4:30 such that we weren’t getting any data and
coupled with some nearby radar returns conditions warranted closing.
                       ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
       (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
 NM06      D         T/U      20:55  21:05   Pointing problems
               ---------------- FOCUS LOG ---------------
Time  Instrument  Focus    Az  El  Temp Strc Prim  Sec  Air  filt FWHM
 -----------------------------------------------------------------
17:49 dis-slit -188( -97)   3  58   5.0  6.6  6.4  5.5  5.2     1.30
00:19 dis-slit -114(-153) -61  47   4.0  3.3  3.8  3.0  3.6     1.30
                ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     16:00    31     8     22    24  (NNE)    518    clear     none
     17:00    34     0     21    11    (N)    434    clear     none
     18:00    30     4     17    37   (NE)    821    clear     none
     19:00    26    10     23    21  (NNE)    891    clear     none
     20:00    31     2     19    16  (NNE)    431    clear     none
     21:00    31     6     10    11    (N)    385    clear     none
     22:00    31     5     19    19  (NNE)    412  ptly cldy   none
     23:00    33     3     24    35   (NE)    355  ptly cldy   none
     00:00    38    -1     18    66  (ENE)    122  ptly cldy   none
     01:00    36     0      3   158  (SSE)     85  ptly cldy   none
     02:00    36    -1      3   167  (SSE)     93  ptly cldy   none
     03:00    36    -1      4   181    (S)    142  ptly cldy   none
     04:00    34    -2      2   164  (SSE)    171 mstly cldy   none
     05:00    35    -3      6   181    (S)    129 mstly 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: 2.9.1
      Current TUI version: TUI 1.4.1