----------------------------------------------------------------------------- Mauna Loa Solar Observatory Observer's Log ----------------------------------------------------------------------------- Tue Jul 6 16:47:58 GMT 2010 Year: 10 Doy: 187 Observer: koon WEATHER COMMENT: Tue Jul 6 16:48:00 GMT 2010 Clear sky, wind=5mph from the SE, temp=53F. ___end___ Tue Jul 6 16:55:05 GMT 2010 MKIV Start Patrol Tue Jul 6 16:55:22 GMT 2010 CHIP Start Patrol PSPT COMMENT BY DARRYL: Tue Jul 6 17:14:00 GMT 2010 Observing. ___end___ Tue Jul 6 17:36:33 GMT 2010 MKIV End Patrol Tue Jul 6 18:01:36 GMT 2010 CHIP LSD Tue Jul 6 18:03:08 GMT 2010 CHIP End LSD Tue Jul 6 18:03:16 GMT 2010 CHIP BiasLSD Tue Jul 6 18:04:02 GMT 2010 CHIP End BiasLSD Tue Jul 6 18:04:10 GMT 2010 CHIP Bias Tue Jul 6 18:04:56 GMT 2010 CHIP End Bias Tue Jul 6 18:05:09 GMT 2010 CHIP ReStart Patrol Tue Jul 6 20:19:18 GMT 2010 MKIV Start Cal **MKIV PROBLEM COMMENT BY DARRYL**: Tue Jul 6 20:19:40 GMT 2010 I think the CCD on the Mk4 camera is failing, we're seeing the same "dark noise" signal like we did when the last CCD sensor failed in this camera, it's not exactly the same but there is signal even when the sensor isn't illuminated by the solar image, last bad CCD had raised noise across the sensor with a high point in the central region, this sensor has a fairly level raised signal area across the sensor but dip a lot near the right edge, and there are high spikes on the outside edges of where the double signal "humps" normally fall and lowered spikes on the inside edges of where those humps normally fall - even though it is dark and there aren't any humps. This is the case even with the camera and SK lens covered with black photography cloth so it isn't a light leak problem. The double humps also show a big dip in the right humps as first noticed by Ben back on 6/28/10 before I started to realign the camera to increase the Vgain and in hopes of eliminating this dip. I've taken pictures and sent out an explanatory email with a timeline and the request for help in getting a new CCD sensor. We should keep running Mk4 anyway, the data may still be useful. I'm running a calibration now, after that I'll do a "Correct" and then run another calibration. ___end___ Tue Jul 6 20:38:05 GMT 2010 MKIV End Cal Tue Jul 6 20:45:53 GMT 2010 MKIV Start Correct Tue Jul 6 20:47:25 GMT 2010 MKIV End Correct MKIV COMMENT BY DARRYL: Tue Jul 6 20:48:16 GMT 2010 Last output line from "Correct" shows: s & p hairlines 97 274 97 282 and the up/down signal looks greater than the last Correct showed. Back in 5/09 the hairlines were found at 107,275 and 108,274 instead of 97,274 and 97,282 like now, but the Correct graph looks bad at low heights around that 95-110 region if I'm reading it right (there aren't any labeled axes) so that corresponds to the bad looking lower heights in the scans and in the double humps (inside edges are lower heights for both humps) and so it makes sense that the Correct program would have difficulty finding hairlines there. I'm going to cycle the KCC power as we have to do between running a "Correct" and "Patrol" else the barrel runs to a limit and sits there. Then I'll go on with other tasks and leave Mk4 as-is until I get back to MLSO on 7/18. ___end___ Tue Jul 6 21:40:36 GMT 2010 MKIV Start Patrol Tue Jul 6 21:46:52 GMT 2010 MKIV End Patrol Tue Jul 6 21:47:42 GMT 2010 MKIV Start Cal MKIV COMMENT BY DARRYL: Tue Jul 6 21:51:57 GMT 2010 After the Correct the real-time scans look the same except for the ring inside of the lowest corona is now mostly white instead of mostly blue. Running another Cal then it's back to Patrol. ___end___ Tue Jul 6 22:07:12 GMT 2010 MKIV End Cal NOTE BY DARRYL: Tue Jul 6 22:12:41 GMT 2010 I setup a delivery of LN2 for 7/21/10, a 170 Liter dewar. ___end___ Tue Jul 6 23:02:37 GMT 2010 CHIP LSD Tue Jul 6 23:04:12 GMT 2010 CHIP End LSD Tue Jul 6 23:04:21 GMT 2010 CHIP BiasLSD Tue Jul 6 23:04:56 GMT 2010 CHIP End BiasLSD Tue Jul 6 23:05:12 GMT 2010 CHIP Bias Tue Jul 6 23:05:56 GMT 2010 CHIP End Bias Tue Jul 6 23:06:03 GMT 2010 CHIP ReStart Patrol Tue Jul 6 23:40:42 GMT 2010 CHIP End Patrol Tue Jul 6 23:44:14 GMT 2010 MKIV End Patrol Wed Jul 7 00:00:40 GMT 2010 MkIV 16_55.rawmk4 17_30.rawmk4 22_17.rawmk4 22_53.rawmk4 23_32.rawmk4 16_58.rawmk4 17_33.rawmk4 22_20.rawmk4 22_56.rawmk4 23_35.rawmk4 17_01.rawmk4 20_22.rawmk4 22_23.rawmk4 22_59.rawmk4 23_38.rawmk4 17_03.rawmk4 20_28.rawmk4 22_26.rawmk4 23_01.rawmk4 23_41.rawmk4 17_06.rawmk4 20_34.rawmk4 22_29.rawmk4 23_04.rawmk4 c20_19.rawmk4 17_09.rawmk4 21_40.rawmk4 22_32.rawmk4 23_07.rawmk4 c20_25.rawmk4 17_12.rawmk4 21_43.rawmk4 22_35.rawmk4 23_13.rawmk4 c20_31.rawmk4 17_15.rawmk4 21_50.rawmk4 22_38.rawmk4 23_17.rawmk4 c21_54.rawmk4 17_18.rawmk4 21_57.rawmk4 22_41.rawmk4 23_20.rawmk4 c22_00.rawmk4 17_21.rawmk4 22_03.rawmk4 22_44.rawmk4 23_23.rawmk4 17_24.rawmk4 22_11.rawmk4 22_47.rawmk4 23_26.rawmk4 17_27.rawmk4 22_14.rawmk4 22_50.rawmk4 23_29.rawmk4