----------------------------------------------------------------------------- Mauna Loa Solar Observatory Observer's Log ----------------------------------------------------------------------------- Tue Aug 19 16:26:55 GMT 2003 Year: 03 Doy: 231 Observer: koon WEATHER COMMENT: Tue Aug 19 16:26:59 GMT 2003 Medium to thick cirrostratus overcast, wind=10 mph from the SE, temp=44 F. Tue Aug 19 16:33:34 GMT 2003 CHIP Start Patrol Tue Aug 19 16:33:47 GMT 2003 PICS Start Patrol COMMENT: Tue Aug 19 17:05:57 GMT 2003 Disconnected the battery charger on the lift in the main dome. PSPT COMMENT: Tue Aug 19 17:30:00 GMT 2003 There was a hazy deposit on the CaK filter again despite cleaning it yesterday, probably caused by outgassing from foam rubber in vicinity of heaters which are very near the filters. Removed pieces of plastic tape that were on the inside of the hatch since plastic outgasses too. Maybe we can turn down the temp. PSPT COMMENT: Tue Aug 19 17:57:57 GMT 2003 Observing. Tue Aug 19 18:00:41 GMT 2003 CHIP LSD Tue Aug 19 18:02:22 GMT 2003 CHIP End LSD Tue Aug 19 18:02:28 GMT 2003 CHIP BiasLSD Tue Aug 19 18:02:36 GMT 2003 PICS Flat Tue Aug 19 18:03:19 GMT 2003 CHIP End BiasLSD Tue Aug 19 18:03:25 GMT 2003 CHIP Bias Tue Aug 19 18:04:15 GMT 2003 CHIP End Bias Tue Aug 19 18:04:58 GMT 2003 PICS End Flat Tue Aug 19 18:10:38 GMT 2003 MKIV Start Patrol MKIV COMMENT: Tue Aug 19 18:10:40 GMT 2003 Centered occulting and started obs though thin cloud layer still exists. WEATHER COMMENT: Tue Aug 19 18:19:55 GMT 2003 Cirrostratus overcast is gradually thinning out. **** EVENT COMMENT ****: Tue Aug 19 18:44:47 GMT 2003 Nice Flare on AR near East limb around 1820 UT. Tue Aug 19 18:46:21 GMT 2003 MKIV End Patrol COMMENT: Tue Aug 19 19:53:31 GMT 2003 Extended the dome slot. WEATHER COMMENT: Tue Aug 19 19:53:40 GMT 2003 Some orographic clouds are getting near. Tue Aug 19 20:13:56 GMT 2003 CHIP End Patrol WEATHER COMMENT: Tue Aug 19 20:14:07 GMT 2003 Thick orographic clouds are overhead, pausing obs. Tue Aug 19 20:15:44 GMT 2003 PICS End Patrol PSPT COMMENT: Wed Aug 20 02:24:09 GMT 2003 For the next few days we are trying a few tests to determine if the haze on the ND prefilters is related to the heater and the orientation of the filter wheel when it is stowed at the end of the day. The current filter wheel stow position is 1000. For today's test I removed and cleaned the prefilters of the CaK and the Red filter assemblies, then I swapped their normal locations, then I stowed the filter wheel at the regular 1000 position. This morning the CaK filter had the greatest haze and the Red filter had the least, we'll see if that is reversed tomorrow morning. I also checked the blue filter and it was hazy so I cleaned it too - but it is in its regular position now. At the end of today the CaK prefilter was good, no haze, even though the heater was on and that instrument was used. Tomorrow Eric will check the filters in the morning, and at the end of the day he'll clean them again and then leave the heater off overnight. On Thursday I'll check them in the morning to see if they got hazy without the heater on. I'll turn the heater back on and we may decide to reposition the filter wheel stowing to a place where the prefilters stay cleaner, if possible. Wed Aug 20 02:35:09 GMT 2003 MkIV 18_10.rawmk4 18_19.rawmk4 18_28.rawmk4 18_37.rawmk4 18_13.rawmk4 18_22.rawmk4 18_31.rawmk4 18_40.rawmk4 18_16.rawmk4 18_25.rawmk4 18_34.rawmk4 18_43.rawmk4