Date: Tue, 8 Sep 1998 05:41:19 -0600
From: tia@tycho.apo.nmsu.edu (Tia Hoyes)
Subject: 3.5m obslog 980907
                         MONDAY  SEPTEMBER 7, 1998
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                    ACTUAL
ASTRONOMER       OBSERVER          INSTRUMENT   DATE   START FINISH
Deutsch           Deutsch            GRIM2      9/07   18:45 01:05
Turner/Gillespie   Hoyes           DIS/GUIDER   9/07   01:35 05:10
 INST        SCHEDULED      OBS      WEATH     EQUIP   DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
UW10/R     19:44 01:10   0.8  4.7   0    0    0    0    0    0    0
PU01/EN01/S01:10 05:18    0   4.1   0    0    0    0    0    0    0
(note: times listed include instrument change time)
                               ACTIVITY LOG
The telescope was opened at 18:00.
Eric Deutsch and Scott Anderson were observing for the first half of the
evening.
COMMENTS:Eric Deutsch & Scott Anderson:
  Everything worked nearly flawlessly tonight.  We took over 1100
frames with GRIM without trouble.  About 3 or so images had strange
patterns on them but they were immediately followed by normal images.
At times when we were at airmass less than 1.1 we obtained many frames
with 0.65-0.75 arcsec seeing and around 20 frames with FWHM between
0.55 and 0.60.  We were imaging in f/10 mode (0.236 arcsec/pix) in K
band.  Otherwise, telescope, rotator, etc. worked perfectly.  Many of
the short (5 & 10 sec) images were elongated in various orientiations;
it's hard to say whether telescope shake or seeing variation is
responsible for this.  We've seen this on several nights in the past
month.
One minor oddity: upon connecting with Remark, the greeting says one should
be using version 2.41 but we're using version 2.42 here.  No problems
came from it, though.
I observed 2237 for the Lens Monitoring with DIS.
I began a pointing model at 3am, but the rotator began having problems half
way through (it lost it's place again:suppose to be at 51.09, was at 141.98).
I stopped the process, and began another pointing model at 3:50. The second
one also had problems with the rotator going to the right location.  I halted
everything, and went up to the observing level to try some manual tests with
the rotator. It seemed to rotate when the command 'rot 0.0 phys' was entered.
I tried a completely different pointing model the third time, and the rotator
stayed at zero, and would not move with the completed slew.  I stopped the
process again, and slewed using Remark, and the rotator began working again.
I began another pointing model, but the rotator got lost again.
At this point, I stopped the motors and initialized and sent the rotator to
zero.  I then slewed in remark, and the rotator got stuck again.  I think there
is something seriously wrong as it will not go past 144. I stopped testing for
fear that I may damage something further.
Forecast:(4:30am)
.TODAY...FAIR THIS MORNING AND PARTLY CLOUDY IN THE AFTERNOON.
.TONIGHT...FAIR SKIES.
.WEDNESDAY...FAIR EARLY IN THE MORNING. PARTLY CLOUDY THEREAFTER WITH
WIDELY SCATTERED SHOWERS OR THUNDERSTORMS.
(* means a trouble report has been issued or appended to)
                               FOCUS LOG
                            SEPTEMBER 7, 1998
                Best     Telescope               Wind                 Seeing
Time   Inst     Focus     Az    El   Temp#      Dir  MPH     filter   FWHM "
19:30 GRIM2  +75(7077)  177.1 56.9  ?/14.72    73.5  15.3      K      1.01
02:00  DIS  -100(6496)  219.3 54.1  ?/11.08   122.0  15.4     IN      1.52
03:00 GUIDER  52000     237.9 44.3  ?/10.88   104.8  12.7    empty    1.60
# The first temp is air, the second is truss, both in degrees C.
                                 WEATHER
                           SEPTEMBER  7,  1998
                                 Wind
    Time   Temp F Dewp.   MPH.    Dir.       DUST     Sky         Precip.
     16:01    32    32     11    51  (NE)     291    clear         none
     17:01    32    32     10    73  (ENE)    319    clear         none
     18:01    32    32     10    83  (E)      288    clear         none
     19:01    32    32     19    72  (ENE)    255    clear         none
     20:01    32    32     13    82  (E)      594    clear         none
     21:01    32    32     13    82  (E)      357    hazy          none
     22:01    32    32     12    82  (E)      351    hazy          none
     23:01    32    32     11   112  (ESE)    324    clear         none
     00:01    32    32     12   124  (SE)     348    clear         none
     01:01    32    32     11   117  (ESE)    355    clear         none
     02:01    32    32     14   119  (ESE)    390    clear         none
     03:01    32    32      5    97  (E)      379    clear         none
     04:01    32    32      9   104  (ESE)    426    clear         none
     05:01    32    32     19   124  (SE)     421    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: 2.42a
Current guide software version:GIm Ctrl v3.0b 15.out
-Tia