----------------------------------------------------------------------------- Mauna Loa Solar Observatory Observer's Log ----------------------------------------------------------------------------- Thu May 20 16:51:55 GMT 2021 Year: 21 Doy: 140 Observer: mlso WEATHER COMMENT: mcotter: Thu May 20 16:53:33 GMT 2021 Temp: 46.2f, Humidity: 28%, Pressure: 28.706in, Wind: 9mph from 244degs, Skies: Clouds and mist up to approximately the 8,500' level. Hazy skies with an inversion layer visible on the horizon at or above Maunakea. ___end___ GENERAL COMMENT BY mcotter: Thu May 20 16:53:41 GMT 2021 Opened windows upstairs ___end___ GENERAL COMMENT BY mcotter: Thu May 20 16:53:49 GMT 2021 PM Blew off Kcor O1 ___end___ Thu May 20 16:59:24 GMT 2021 Kcor Focus/alignment program exited GENERAL COMMENT BY mcotter: Thu May 20 17:22:41 GMT 2021 Kcor now running. SGS offsets: X(RA): 85, Y(Dec): -125. Polarization started off wrong. Stopped Socket and restarted. Polarization now correct: Mid, Bright, Dark, Mid. Polarization state before 171659 incorrect. ___end___ GENERAL COMMENT BY mcotter: Thu May 20 18:01:04 GMT 2021 Kcor has been stopped. ___end___ UCoMP COMMENT BY mcotter: Thu May 20 18:02:07 GMT 2021 Continuing to work on Ucomp installation. ___end___ WEATHER COMMENT: mcotter: Thu May 20 18:04:35 GMT 2021 Temp: 49.2f, Humidity: 31%, Pressure: 28.71in, Wind: 13mph from 259degs, Skies: Altocumulus clouds are beginning to form over the observatory. Additional Altocumulus clouds that are to the west are increasing in size and numbers and appear to be moving closer to the western slope of Maunaloa. ___end___ WEATHER COMMENT: mcotter: Thu May 20 19:09:46 GMT 2021 Temp: 51.9f, Humidity: 34%, Pressure: 28.708in, Wind: 19mph from 264degs, Skies: High altitude Cirrus clouds are increasing and Cirrus is continuing to blow in from the west. The wind is increasing out of the west-southwest with occasional strong gusts. ___end___ Thu May 20 20:34:13 GMT 2021 Kcor Focus/alignment program exited Fri May 21 00:24:39 GMT 2021 Kcor Focus/alignment program exited UCoMP COMMENT BY mcotter: Fri May 21 00:27:49 GMT 2021 UCoMP work today: 1) With ND in beam and pointing at sun, finished x-y centering of Rcam on solar disk. Checked that Tcam is still centered. 2) With spar vertical and pinned, removed Lyot filter and mounted laser near filter wheel pointing at cameras. Put target near beamsplitter and pointed laser at center of target. Removed target and looked at reflection off cameras and adjusted tip/tilt to get reflection back on laser. 3) Mounted cooling tubes onto cameras connecting to bulkhead feedthroughs. Checked tip/tilt and it did not change. 4) Remove laser and re-install Lyot filter with ND still in beam. Pointed at sun and checked centering of sun on cameras. Looked good. 5) With ND removed,1083 filter in beam, diffuser in beam, and occulter in beam, focused the cameras for sharpest focus of edge f occulter. Both cameras seemed to find best focus at the front of there focus stage range. ___end___ GENERAL COMMENT BY mcotter: Fri May 21 00:37:38 GMT 2021 Attempted to restart Kcor but the polarization repeatedly came up incorrect. I stopped and restarted the socket cam several times but the polarization would not self correct. Finally I restarted the Kcor computer and the polarization self corrected and changed state: Mid, Bright, Dark, Mid. ___end___ WEATHER COMMENT: mcotter: Fri May 21 00:44:08 GMT 2021 Temp: 55.4f, Humidity: 36%, Pressure: 28.66in, Wind: 15mph from 277degs, Skies: The skies have cleared, for the most part, but aerosols and very high altitude Cirrostratus clouds are present and making for a very bright sky. The wind is strong and gusty and is blowing from the west-northwest, causing some difficulties with observing as the spar buffeting. ___end___ GENERAL COMMENT BY mcotter: Fri May 21 01:32:27 GMT 2021 Looks like we may have had a CME on the west limb while doing UCoMP alignments this morning. With the afternoon aerosols it is hard to be sure since the structures re fairly washed out but it appears a big loop has opened up. ___end___ UCoMP COMMENT BY mcotter: Fri May 21 01:55:36 GMT 2021 Took O1 position vs focus data with UCoMP. ND 3.8 in the beam ___end___ GENERAL COMMENT BY mcotter: Fri May 21 02:05:26 GMT 2021 Some data today and good progress on UCoMP ___end___ ONSITE STAFF: berkey, mcotter, Tomczyk