Mauna Loa Solar Observatory Observer's Log ----------------------------------------------------------------------------- Sat Apr 2 17:04:45 GMT 1994 Year: 94 Doy: 092 Observer: yasukawa COMMENT: Sat Apr 2 17:04:56 GMT 1994 Cool, clear, light southwest breeze. 7 degrees C. Sat Apr 2 17:09:05 GMT 1994: Patrol Start COMMENT: Sat Apr 2 17:16:10 GMT 1994 Removed L00017 from unit 1. Loaded L00019. L00018 running in unit 0. Sat Apr 2 18:01:21 GMT 1994: Filemark-Calibration DPMON COMMENT: Sat Apr 2 18:02:50 GMT 1994 Stopping PMON to run a test to track down source of ring on image. Changing back to normal (1.4" dia. aperture). Resetting exposure from 80 to 27 on limb and reference images. Recording images for a couple of loops. Sat Apr 2 18:16:05 GMT 1994: Patrol Start Sat Apr 2 18:26:13 GMT 1994: Patrol End DPMON COMMENT: Sat Apr 2 18:30:59 GMT 1994 Stuck black cloth tape on 1/2 of aperture. Sat Apr 2 18:31:48 GMT 1994: Patrol Start Sat Apr 2 18:40:07 GMT 1994: Patrol End DPMON COMMENT: Sat Apr 2 18:42:41 GMT 1994 Used M1 control to offset solar image at Lyot stop so that part of the edge of the solar image is inside the aperture i.e. there should be no reflection of the solar image back up the light path on part of the lyot stop. Sat Apr 2 18:45:25 GMT 1994: Patrol Start DPMON COMMENT: Sat Apr 2 18:47:46 GMT 1994 Will move image closer to edge. Right now it is a ways in. DPMON COMMENT: Sat Apr 2 18:52:07 GMT 1994 Moving image off 90 degrees away from its present offset. DPMON COMMENT: Sat Apr 2 18:57:12 GMT 1994 Centering image again, then masking across a portion of the Lyot stop with black tape (chord mask). Sat Apr 2 19:01:13 GMT 1994: Filemark-Calibration DPMON COMMENT: Sat Apr 2 19:04:37 GMT 1994 Rotating chord mask 90 degrees. DPMON COMMENT: Sat Apr 2 19:13:19 GMT 1994 Rotated mask by 180 degrees and moved it a bit inward. Log entry at the time did not get entered, did not begin log process properly. Sat Apr 2 19:21:01 GMT 1994: Patrol End Sat Apr 2 19:25:54 GMT 1994: Patrol Start DPMON COMMENT: Sat Apr 2 19:25:55 GMT 1994 Trying a black paper Lyot stop of approximately the same diameter. Sat Apr 2 19:34:05 GMT 1994: Patrol End DPMON COMMENT: Sat Apr 2 19:35:52 GMT 1994 Installed 0.7" aperture made of blackened paper. Reduced exposure from ...... that is increased exposure from 27 to 80 again. Sat Apr 2 19:37:14 GMT 1994: Patrol Start DPMON COMMENT: Sat Apr 2 19:45:47 GMT 1994 Replaced paper aperture with .7" aluminum aperture that has been taped on the top half of metal part (no tape across hole), with black cloth tape. Bottom half of edge is bare aluminum. DPMON COMMENT: Sat Apr 2 19:55:14 GMT 1994 Rotated tape to bottom. DPMON COMMENT: Sat Apr 2 20:01:17 GMT 1994 Rotated tape to side (west wall of dome). Sat Apr 2 20:02:19 GMT 1994: Filemark-Calibration DPMON COMMENT: Sat Apr 2 20:08:54 GMT 1994 Test pau. looks to me like using a small aperture made from black anodized aluminum might be a solution. I don't know how the cloth tape will hold up, but for now I will cover the front of the Lyot stop with black cloth tape (the 0.7" aperture DAK made) and reinstall it. COMMENT: Sat Apr 2 20:11:41 GMT 1994 Opening top of dome. MKIII continues. COMMENT: Sat Apr 2 20:18:50 GMT 1994 Brushed front surface of MKIII O1. Dome reconfigured. Taped aperture inserted. Sat Apr 2 20:19:55 GMT 1994: Patrol Start DPMON COMMENT: Sat Apr 2 20:26:18 GMT 1994 Ring still slightly visible around image of occulter. Sat Apr 2 21:02:20 GMT 1994: Filemark-Calibration DPMON COMMENT: Sat Apr 2 21:21:19 GMT 1994 Pressed boot. Halle in/out was messing up. COMMENT: Sat Apr 2 21:49:48 GMT 1994 Activity report: QP: 80; 223; 245; 300; No coronal activity DPMON COMMENT: Sat Apr 2 21:51:05 GMT 1994 Halle in/out ran away again. rebooted Plessey. COMMENT: Sat Apr 2 21:51:32 GMT 1994 TAPES: MKIII: H00730 DPMON: P00030 LOW-L: L00018 DPMON COMMENT: Sat Apr 2 21:55:04 GMT 19944 Objective wheel probably blocked. setting up manually. Sat Apr 2 21:58:30 GMT 1994: Patrol Start Sat Apr 2 22:02:20 GMT 1994: Filemark-Calibration Sat Apr 2 22:04:02 GMT 1994: Patrol End Sat Apr 2 22:04:39 GMT 1994: Filemark SCAN-LOG SCAN-LOG 17:10:03. 4/2/94 DOY 92 17:16:33 17:19:46 17:23:01 17:26:13 17:29:26 17:32:37 17:35:49 17:39:00 17:42:17 17:45:29 17:48:47 17:51:59 17:55:13 17:58:25 18:01:39 18:04:51 18:08:04 18:11:14 18:14:27 18:17:38 18:20:52 18:24:03 1827 0 CL 18:30:59 1835 15CL 18:45:35 18:48:45 18:51:57 18:55:07 18:58:19 19:01:29 19:04:41 19:07:51 19:11:03 19:14:13 19:17:25 19:20:36 19:23:48 19:26:58 19:30:09 19:33:18 19:36:29 19:39:39 19:42:48 19:45:57 19:49:06 19:52:14 19:55:24 19:58:33 20:01:44 20:04:54 20:08:03 20:11:10 20:14:20 20:17:27 20:20:36 20:23:44 20:26:53 20:30:01 20:33:09 20:36:16 20:39:26 20:42:34 20:45:42 20:48:49 20:51:57 20:55:04 20:58:12 21:01:19 21:04:27 21:07:35 21:10:44 21:13:53 21:17:06 21:20:13 21:23:21 21:26:28 21:29:36 21:32:43 21:35:52 21:38:59 21:42:07 21:45:14 21:48:23 21:51:30 21:54:39 21:57:46 0 ERRORS OK