Date: Wed, 21 Mar 2001 05:50:29 -0700 (MST)
From: Jack Dembicky
Subject: 3.5m Night Log 20010320
                        APACHE POINT OBSERVATORY
                        3.5m Telescope Night Log
                        Tuesday, March 20th, 2001
                                                          ACTUAL
 ASTRONOMER    OBSERVER(S)             INSTRUMENT      START  FINISH
 --------------------------------------------------------------------
 R.Walterbos   D.Thilker               SPIcam          18:20  19:50
                                                       20:35  22:35
                                                       23:15  00:05
 V.Narayanan   V.Narayanan             GrIm            01:08  03:12
                                                       03:45  05:28
   INST        SCHEDULED     WEATH     EQUIP     OBS     DAY  NOTUSED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 --------------------------------------------------------------------
 NM04/R      19:08 00:10   1.5   0    0    0   3.5   0    0    0    0
 PU02/R      00:10 05:12   0.6   0    0    0   3.8  0.7   0    0    0
  note: scheduled times listed include instrument change time
                 ------------- ACTIVITY LOG --------------
 1st & 2nd half Observing Specialist: Jack Dembicky
 Started cooling the enclosure (fans on) at 16:30.  Opened louvers at
 17:25. Opened enclosure/louvers at 18:05.
 Clouds moved in around 19:00 and remained for the rest of the night.  We
 had very good seeing (sub arc sec) despite the clouds interfering with
 observations for the first half observer.
 Seeing was 0.53!!! arc sec when I focused GrIm (at f/10 in J) at 00:35
 although clouds prevented 2nd half from starting observations on time.
 Clouds most all night long, stopping observations at various times as
 they thickened and thinned.  Eventually they mostly cleared out late in
 the early morning.
         --------------- INSTRUMENT FOCUS LOG ----------------
                                       Air/Truss   Wind
 Time   Instrument   Focus     Az El    Temp-C    Dir MPH  filt   FWHM"
 ----------------------------------------------------------------------
 18:50  SPIcam     -125(981)    8 47    6.7/10.0  348   5   R     0.64
 18:55  NA2gdr   -761(60288)    8 47    6.7/10.0  348   5  red    0.80
 20:30  SPIcam      -10(982)   13 52    7.2/7.4   245   1   R     0.54
 21:50  SPIcam      -30(919)    0 54    6.6/6.4   207   0   R     0.61
 22:05  NA2gdr   -256(59743)    0 54    6.6/6.4   207   0   -     0.84
 23:10  SPIcam     120(1067)  -10 53    7.7/6.6   338   3   R     0.57
 23:15  NA2gdr   -928(59071)  -10 53    7.7/6.6   338   3   -     0.83
 00:35  GrIm-f/10    0(1011)  249 33    7.1/6.5   278   5   J     0.53
              ------------- WEATHER CONDITIONS ------------
                                 Wind                        Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:01    48    18      5   264  (W)      450    clear     none
     17:01    51    18      9   289  (WNW)    404   mst clr    none
     18:01    45    11     10   355  (N)      331   pt cldy    none
     19:01    44    17      5   352  (N)      640   pt cldy    none
     20:01    45    16      4   345  (NNW)    563   mst cldy   none
     21:01    45    15      2   281  (W)      674   pt cldy    none
     22:01    44    18      0   245  (WSW)   1070   mst cldy   none
     23:01    47     7      3   287  (WNW)    118   mst cldy   none
     00:01    45    14      6   329  (NNW)    529   mst cldy   none
     01:01    44    14      4   265  (W)      744   pt cldy    none
     02:01    45    14      2   260  (W)      910   pt cldy    none
     03:01    45    12      6   244  (WSW)    495   pt cldy    none
     04:01    43    12      5   194  (SSW)    611   mst clr    none
     05:01    45     5      5   261  (W)      391   mst clr    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
  Primary, secondary, and tertiary mirrors in place and collimated.
  Primary support system operational. Mirror ventilation system in place.
  Telescope drives operational. Current Remark version: 2.62. Current
  guide software version: GIm Ctrlv3.0b27. Current TCC version: 2.5.1
  Current MC version: v1_7_3.