----------------------------------------------------------------------------- Mauna Loa Solar Observatory Observer's Log ----------------------------------------------------------------------------- Tue Aug 13 16:48:51 GMT 1996 Year: 96 Doy: 226 Observer: koon WEATHER COMMENT: Tue Aug 13 16:48:55 GMT 1996 Mostly clear sky with tall cumulus clouds to the East, wind=10 mph from the SE temp=43 F. Tue Aug 13 16:53:51 GMT 1996 dPMon Start Patrol Tue Aug 13 16:54:03 GMT 1996 CHIP CHIP Start Patrol WEATHER COMMENT: Tue Aug 13 16:58:24 GMT 1996 Clouds to the East are blocking sun occasionally. Tue Aug 13 17:02:57 GMT 1996 dPMon Flat Tue Aug 13 17:03:55 GMT 1996 dPMon End Flat CHIP COMMENT: Tue Aug 13 17:14:47 GMT 1996 Stalled with Program:FixCenter and Optics:Busy, used Kill/Run to restart. Tue Aug 13 17:22:10 GMT 1996 CHIP CHIP Start Patrol CHIP COMMENT: Tue Aug 13 17:37:25 GMT 1996 O1 was off in X direction and now that FixCenter is running it is moving the O1 off in the Y-direction. I'll move the O1 back to where it should be. MKIII COMMENT: Tue Aug 13 17:40:53 GMT 1996 I got two good scans and did a difference, still have concentric rings, I'll check the seating of the corrector memory boards. The only way to sync the o-scope traces was to switch to internal triggering. Tue Aug 13 18:02:56 GMT 1996 dPMon Flat Tue Aug 13 18:03:56 GMT 1996 dPMon End Flat Tue Aug 13 18:04:38 GMT 1996 CHIP Bias Tue Aug 13 18:05:48 GMT 1996 CHIP End Bias Tue Aug 13 18:05:59 GMT 1996 CHIP Water Tue Aug 13 18:06:41 GMT 1996 CHIP End Water MKIII COMMENT: Tue Aug 13 18:07:47 GMT 1996 I've stopped taking data while I check into the ring problem. MKIII COMMENT: Tue Aug 13 18:30:44 GMT 1996 Since clouds are passing over it is difficult to get good test scans, but after reseating the corrector memory board for channel 0 it looks like the rings are still there. So both boards have been reseated now (I/O and memory). I talked to Alice, the problem is showing up in channel 1 also so it seems unlikely that the boards for both channels would come loose at the same time. I think the problem is directly related to not being able to sync the o-scope traces to the microprocessor external trigger signal. Tue Aug 13 18:44:58 GMT 1996 dPMon End Patrol Tue Aug 13 18:45:49 GMT 1996 CHIP CHIP End Patrol MKIII COMMENT: Tue Aug 13 18:50:12 GMT 1996 MKIII COMMENT: Tue Aug 13 22:43:55 GMT 1996 Since it was cloudy and rainy for most of the day I tried to track down the reason for the lack of pixel sync on the o-scopes. I tried removing and replacing all the cables in the back of the Analog rack, this didn't change the sync problem but maybe it helped the ring problem, when the weather clears it will be good to see if anything changed there. I used an o-scope up in the dome to check some test points, the start pulses jumped around and so did the 1/Rot pulses from the waveplate, this seems unusual, Eric said it might be caused by noise or a sync problem between the o-scope and the pulses. The waveplate seemed to be rotating without any noticeable problem. Also, when I disconnect the external pixel sync cable on the o-scopes in the Control Room nothing happens to the traces, as if no usable signal is getting through at all. Eric will continue the investigation tomorrow. Tue Aug 13 23:13:57 GMT 1996 CHIP ending tape COMMENT: Tue Aug 13 23:50:36 GMT 1996 Activity report: QP: 127; 225; 259; 288; 308. No coronal activity. TAPES: ****** MKIII: H01362 DPMON: P00683 CHIP: C00100 LOWL: L00408 in drive #0 SCAN-LOG SCAN-LOG 16:54:33. 8/13/96 DOY 226 16:59:51 17:03:07 17:06:24 17:09:38 17:12:53 17:16:05 17:19:20 17:22:35 17:25:54 17:29:07 17:32:21 17:35:33 17:38:51 17:42:03 17:45:19 17:48:30 17:51:43 17:54:54 0 ERRORS OK