----------------------------------------------------------------------------- Mauna Loa Solar Observatory Observer's Log ----------------------------------------------------------------------------- Tue May 19 18:29:02 GMT 2026 Year:26 Doy:139 Observer: Weather COMMENT BY : Tue May 19 18:30:20 GMT 2026 MLO Current Weather Timestamp (UTC): 2026-05-19 18:26:00 Temperature : 47.12 deg F Dew Point : 40.92 deg F Pressure : 681.45 mbar Wind Speed : 6.04 mph Wind Direction : 49.0 deg Skies: Clear but bright sky. The inversion layer is a blue gray and appears above the observatory on the horizon. Some Orographic clouds to the south and east. ___end___ BY : Tue May 19 18:35:09 GMT 2026 Power Supply Levels: The ECO FLO battery was at 2% and the YETI was at 5% when I arrived onsite at 0640 HST. The ILX was off due to the low battery levels. I waited until 0800 HST to turn on the ILX, which is now at approximately 20 C. The ECO FLO is now at 7% and the YETI is still at 5%.. I have turned everything on and am now getting ready to observe, as long as the power input increases and maintains the ECO FLO battery. ___end___ KCOR BY : Tue May 19 18:51:18 GMT 2026 Kcor: Unfortunately by the time I started running the Focus routine Orographic clouds developed over the viewing area and came in from the south-southeast. ___end___ Weather COMMENT BY : Tue May 19 18:52:25 GMT 2026 MLO Current Weather Timestamp (UTC): 2026-05-19 18:47:00 Temperature : 46.83 deg F Dew Point : 41.57 deg F Pressure : 681.6 mbar Wind Speed : 6.26 mph Wind Direction : 13.3 deg Skies: With incredible speed the sky has become mostly overcast, prompting me to pause any attempts to get on sky for observations. ___end___ KCOR COMMENT BY : Tue May 19 19:00:48 GMT 2026 Kcor: Due to poor sky conditions I have turned off the Kcor computer in an attempt to get more power in the ECO FLO battery, just in case the sky clears again. The sky has quickly become completely overcast so I have closed the dome and windows. I have left the SGS computer on and have put the spar in Open Loop, in the event the sky does come clear again. ___end___ Weather COMMENT BY : Tue May 19 19:03:10 GMT 2026 MLO Current Weather Timestamp (UTC): 2026-05-19 18:56:00 Temperature : 46.21 deg F Dew Point : 41.77 deg F Pressure : 681.57 mbar Wind Speed : 6.93 mph Wind Direction : 30.4 deg Skies: The sky is now almost completely overcast...weather conditions change unbelievably fast on the mountain. I will continue to monitor conditions regularly in the event we get some sky clearing to observe. ___end___ GENERAL COMMENT BY : Tue May 19 19:06:53 GMT 2026 The ILX & heaters, Wahoo 2 computer, Control Station monitors, SGS computer and SPAR are all still energized in the event the sky does clear enough for observing. ___end___ GENERAL COMMENT BY : Tue May 19 19:15:41 GMT 2026 The cloud coverage had become so thick that the input wattage became much lower than the output wattage . I have turned everything off except for the ILX, Wahoo 2 computer and monitors. Even after multiple attempts I have not been able to connect to Global Protect on either Wahoo 2 or Kcor computers. The Kcor computer is now off, but I will continue to try to connect to Global Protect on the Wahoo 2 computer. ___end___ Weather COMMENT BY : Tue May 19 19:37:27 GMT 2026 MLO Current Weather Timestamp (UTC): 2026-05-19 19:32:00 Temperature : 45.27 deg F Dew Point : 43.95 deg F Pressure : 681.65 mbar Wind Speed : 7.38 mph Wind Direction : 11.1 deg Skies: The sky is completely overcast and a light fog is beginning to roll in and form in the observatory area. ___end___ GENERAL COMMENT BY : Tue May 19 19:58:50 GMT 2026 EPC has arrived onsite. ___end___ Weather COMMENT BY : Tue May 19 20:02:14 GMT 2026 MLO Current Weather Timestamp (UTC): 2026-05-19 19:56:00 Temperature : 44.77 deg F Dew Point : 44.17 deg F Pressure : 681.71 mbar Wind Speed : 9.62 mph Wind Direction : 9.4 deg Skies: Completely overcast. A thick heavy fog has now completely settled over the entire observatory area. ___end___ GENERAL COMMENT BY : Tue May 19 20:03:43 GMT 2026 I have turned the ILX off. ___end___ BY : Tue May 19 20:07:30 GMT 2026 Jay Paulk has arrived onsite. ___end___ BY : Tue May 19 20:08:42 GMT 2026 I still have not been able to connect to Global Protect. I will continue trying to establish a connection. ___end___ GENERAL COMMENT BY : Tue May 19 20:21:12 GMT 2026 Power Supply Levels: ECO FLO 4%. YETI 5%. Because of the dense fog surrounding the observatory the panels are collecting very little Sun input so the input power to the power units is quite low. ___end___ Weather COMMENT BY : Tue May 19 22:08:53 GMT 2026 MLO Current Weather Timestamp (UTC): 2026-05-19 22:38:00 Temperature : 46.85 deg F Dew Point : 45.19 deg F Pressure : 681.11 mbar Wind Speed : 14.09 mph Wind Direction : 39.4 deg Skies: The sky remains completely overcast and the wind is picking up and getting gusty. A bit of fog remains around the entire area of the observatory and a light rain has been falling on and off at times. ___end___ GENERAL COMMENT BY : Tue May 19 22:51:54 GMT 2026 Power Supply Levels. The power levels are as follows: ECO FLO battery: 10%. YETI battery: 1%. ___end___ GENERAL COMMENT BY : Tue May 19 22:59:50 GMT 2026 Network changes. Due to the low power available on the YETI power supply (~1%) I have switched the network computer to the ECO FLO power supply (~10%). The ECO FLO. There is approximately 25 W of power coming into the YETI battery and approximately 150 W of power coming into the ECO FLO. ___end___ BY : Tue May 19 23:03:35 GMT 2026 End Of Day. Upon arriving today the battery power levels were too low to start observing, but the sky was very bright and when I did try to observe clouds quickly came into the viewing area, so regardless of the power available we would not have been able to observe today. Today has been a cold and blustery day with lots of clouds, fog and a light rain; not a good day to observe. ___end___ Logger COMMENT BY : Tue May 19 23:03:44 GMT 2026 Log closed ONSITE STAFF: mcotter, Jay Paulk, EPC ___end___