Date: Thu, 16 Oct 1997 05:50:51 -0600 (MDT)
From: Charles Corson
Subject: 3.5m obslog 971097
                         WEDNESDAY OCTOBER 15, 1997
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                    ACTUAL
ASTRONOMER   INSTRUMENT   DATE   START FINISH
Gillespie    -            10/15  18:00 03:00
 INST        SCHEDULED      OBS      WEATH     EQUIP   DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
EN01	   19:52 05:46    0    7.1  0    2.8    0    0    0    0    0
(note: times listed include instrument change time)
                               ACTIVITY LOG
(* means a trouble report has been issued or appended to)
The engr time was used to collimate the telescope, gather basic metrology
on the primary mirror position, and gather extensive focal plane data
using the guider.  Conditions were clear, but high, variable winds.
Bringing the primary into proper tilt was achieved.  Image quality as
examined in the off-axis images was improved with nearly uniform
images (focused) as function of rotator position.  On axis image quality
was also improved, but does indicate astigmatism.  The bottom line is
that the collimation of the telescope is much improved.
Several data sets of guider focus suites were obtained at various rotator
angles for Jeff Morgan's analysis.
High winds forced the closing of the telescope at 3:00am.  No pointing
model was obtained, or additional throughput data.  An attempt will be
made at tomorrow evening's twighlight to obtain a small pointing model.
GREAT EFFORT!
                                FOCUS LOG
                             OCTOBER 15 1997
                  Best   Telescope           Wind            Seeing
Time   Inst      Focus    Az  El    #Temp   Dir MPH  filter  FWHM "
22:45	SPI   -410(6355) 235/58   6.6/6.3   57  25   R       1.65
#The first temp is air, the second is truss, both in degrees Celsius
                                 WEATHER
                              OCTOBER 15 1997
                                   Wind
    Time  Temp F  Dewp. F  MPH.   Dir.       Dust    Sky          Precip.
     16:01    55    22      5   261  (W)      451    clear        none
     17:01    50    23      5   261  (W)      433    clear        none
     18:01    49    20      7   165  (SSE)    615    clear        none
     19:01    45    17      5    77  (ENE)    391    clear        none
     20:01    43    21     14    68  (ENE)    236    clear        none
     21:01    43    21     14    62  (ENE)    230    clear        none
     22:01    43    19     18    67  (ENE)    286    clear        none
     23:01    43    17     25    61  (ENE)    256    clear        none
     00:01    42    14     30    68  (ENE)    158    clear        none
     01:01    43    12     26    67  (ENE)    134    clear        none
     02:01    42    11     25    70  (ENE)    169    clear        none
     03:01    41    18     36    72  (ENE)    328    clear        none
     04:01    41    17     20    80  (E)      309    clear        none
     05:01    40    17     31    73  (ENE)    297    clear        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
> 1 micron per 0.1 cu. ft.
                             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: 2.36.
Current guide software version: GIm Ctrlv3.0b11.
Charles