Date: Sun, 6 Sep 1998 06:46:45 -0600
From: tia@tycho.apo.nmsu.edu (Tia Hoyes)
Subject: 3.5m obslog 980905
                        SATURDAY  SEPTEMBER 5, 1998
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                    ACTUAL
ASTRONOMER       OBSERVER          INSTRUMENT   DATE   START FINISH
Herald             Bell               GRIM2     9/05   22:00 06:15
 INST        SCHEDULED      OBS      WEATH     EQUIP   DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
UC06/R     20:47 00:55    0   2.9   0    0    0   1.2   0    0    0
PU01/EN01/S00:55 05:17    0    0    0    0    0   4.4   0    0    0
(note: times listed include instrument change time)
                               ACTIVITY LOG
The telescope was opened at 22:10.  Mark Klaene arrived at 19:30 to work on
the rotator problem.  We replaced the servo amp and tested the rotator.  We
had to unhook the guider cabling as the balancer had no tension left in it.
This made it impossible to use DIS as the cable would tangle itself in the
DIS mounting bracket.
I did not observe for Lens Monitoring due to the cable wrap problem.
Eric Bell began observing with GRIM2 at 22:00 and he had no problems.
He ran through the entire night, and the rotator worked wonderfully!
COMMENTS:
Due to work being carried out on the instrument rotator, we opened two
hours late.  Once this was fixed, we opened and observed, without any
problems.  The K' band sky brightness is quite high (around 2 times
normal) meaning that I had to use shorter exposures.  Tia and I suspect
that this bright sky is due to the very bright full moon.  The seeing
varied around 1.1 - 1.3 arcsec all night.  Many thanks to Tia and the
staff at APO for fixing the instrument rotator so quickly.
Eric Bell :)
Forecast:(4:30am)
.TODAY...FAIR THIS MORNING. PARTLY CLOUDY IN THE AFTERNOON WITH
ISOLATED THUNDERSTORMS.
.TONIGHT...FAIR TO PARTLY CLOUDY.
.LABOR DAY...PARTLY CLOUDY WITH ISOLATED AFTERNOON THUNDERSTORMS.
(* means a trouble report has been issued or appended to)
                               FOCUS LOG
                            SEPTEMBER 5, 1998
                Best     Telescope               Wind                 Seeing
Time   Inst     Focus     Az    El   Temp#      Dir  MPH     filter   FWHM "
22:30 GRIM2  +50(6964)  110.6  42.0 ?/15.37   121.9  19.4    K prim    1.33
02:45 GRIM2 -100(6614)  175.7  56.1 ?/11.74    93.3  12.8    K prim    1.31
# The first temp is air, the second is truss, both in degrees C.
                                 WEATHER
                           SEPTEMBER  5,  1998
                                 Wind
    Time   Temp F Dewp.   MPH.    Dir.       DUST     Sky         Precip.
     16:01    32    32     14    56  (NE)     700    clear         none
     17:01    32    32      9   131  (SE)     757    clear         none
     18:01    32    32     12   122  (ESE)    741    clear         none
     19:01    32    32     13   114  (ESE)   1081    clear         none
     20:01    32    32     14   112  (ESE)   1096    clear         none
     21:01    32    32     18   117  (ESE)   1482    clear         none
     22:01    32    32     20   133  (SE)    1397    clear         none
     23:01    32    32     23   122  (ESE)   1486    clear         none
     00:01    32    32     22   111  (ESE)   1590    clear         none
     01:01    32    32     20   113  (ESE)   1359    clear         none
     02:01    32    32     19    89  (E)     1216    clear         none
     03:01    32    32     17    99  (E)     1248    clear         none
     04:01    32    32     17    80  (E)     1558    clear         none
     05:01    32    32     21   125  (SE)    1006    clear         none
     06:01    32    32     21   131  (SE)     320    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