Mauna Loa Solar Observatory Observer's Log ----------------------------------------------------------------------------- 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