Mauna Loa Solar Observatory Observer's Log 
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Wed Apr 13 17:16:37 GMT 1994
Year: 94  Doy: 103
Observer: koon

COMMENT: Wed Apr 13 17:16:45 GMT 1994
Hazy sky, light wind from the southwest, temp=44 F.

Wed Apr 13 17:18:17 GMT 1994: Patrol Start
Wed Apr 13 18:01:49 GMT 1994: Filemark-Calibration
Wed Apr 13 19:01:25 GMT 1994: Filemark-Calibration

DPMON COMMENT: Wed Apr 13 19:42:07 GMT 1994
The Halle filter is continuously moving in and out of the light path, it may
have been doing this since I started this morning, I was getting some strange
images but thought it may have been due to the haze/clouds.

Wed Apr 13 19:45:04 GMT 1994: Patrol End

COMMENT: Wed Apr 13 19:50:18 GMT 1994
Extended dome slot.

Wed Apr 13 19:53:36 GMT 1994: Patrol Start

DPMON COMMENT: Wed Apr 13 19:53:40 GMT 1994
Stopped Patrol and tried moving the Halle filter manually, still kept moving
in and out.  Rebooted Plessey and the Halle responded correctly to manual
commands.  Restarted Patrol, will watch for any problems.

Wed Apr 13 20:00:20 GMT 1994: Filemark-Calibration

DPMON COMMENT: Wed Apr 13 20:38:52 GMT 1994
Pausing Patrol to do some IR filtering testing.

Wed Apr 13 20:59:37 GMT 1994: Patrol Start

DPMON COMMENT: Wed Apr 13 20:59:44 GMT 1994
Removing the lyot stop didn`t give better characteristics to the "ring" image.
It increased in diameter and relative brightness compared to the coronal
background.  The diameter was only about 0.1 solar radius away from the limb
so it was obscuring the desired FOV.  I couldn't find any IR rejecting glass
so I put my Revo sunglasses (90+% IR rejecting) in the path.  The relative
brightness of the ring decreased and the ring seemed to blend into the
corona more (less noticeable but perhaps equal total illumination.  It would
be worthwhile to obtain and try a good IR rejecting glass and/or filter
with the desired bandpass and IR filtering.


MKIII COMMENT: Wed Apr 13 21:28:07 GMT 1994
Doing a dark scan.


COMMENT: Wed Apr 13 21:46:24 GMT 1994
$$$ Getting cloudy, closing down.

Wed Apr 13 21:48:24 GMT 1994: Patrol End

COMMENT: Wed Apr 13 21:55:39 GMT 1994
Activity report:
QP: 52-67.
No coronal activity.

TAPES:
MKIII: H00738
DPMON: P00038
LOW-L: L00024

Wed Apr 13 21:57:25 GMT 1994: Filemark
SCAN-LOG 
SCAN-LOG  17:15:10.  4/13/94 DOY 103      
    17:25:59      17:29:12      17:32:27      17:35:39      17:38:52  
    17:42:03      17:45:15      17:48:26      17:51:39      17:54:50  
    17:58:03      18:01:15      18:04:28      18:07:40      18:10:54  
    18:14:06      18:17:20      18:20:32      18:23:48      18:27:00  
    18:30:13      18:33:25      18:36:38      18:39:50      18:43:03  
    18:46:15      18:49:28      18:52:39      18:55:52      18:59:06  
    1903 0 CL     19:08:36      1913 15CL     19:25:26      19:28:36  
    19:31:48      19:34:58      19:38:10      19:41:23      19:44:39  
    19:47:50      19:51:03      19:54:14      19:57:27      20:00:39  
    20:03:55      20:07:06      20:10:18      20:13:28      20:16:40  
    20:19:50      20:23:02      20:26:15      20:29:33      20:32:43  
    20:35:55      20:39:05      20:42:17      20:45:28      20:48:39  
    20:51:50      20:55:02      20:58:12      21:01:24      21:04:35  
    21:07:46      21:10:57      21:14:08      21:17:19      21:20:31  
    21:27:41      21:33:41      21:36:52      21:40:05      21:43:15  
  0 ERRORS
OK