----------------------------------------------------------------------------- Mauna Loa Solar Observatory Observer's Log ----------------------------------------------------------------------------- Wed Dec 3 17:05:38 GMT 2003 Year: 03 Doy: 337 Observer: yasukawa WEATHER COMMENT: Wed Dec 3 17:05:42 GMT 2003 Cool, in broken orographic clouds, no wind. WEATHER COMMENT: Wed Dec 3 17:12:39 GMT 2003 Sun behind large cumulus cloud. Standing by. A NEW TAPE HAS BEEN PUT INTO KAIEE DLT DRIVE, Wed Dec 3 17:21:14 GMT 2003 **ECHO PROBLEM**: Wed Dec 3 17:48:58 GMT 2003 Reset guide head to vertical (zenith) using SX control command "Move Hour Angle to an angular position". This angular position turned out to be 28 degrees. Reset Hour angle to zero using "Set the current position of HA to zero (use caution)". This corrected the hour angle error that occurred after the stall tests performed yesterday. Thanks Alice, for advising us on the fix. Restarted data taking. ECHO COMMENT: Wed Dec 3 17:54:38 GMT 2003 Time OK. WEATHER COMMENT: Wed Dec 3 17:55:23 GMT 2003 Sun still behind large cumulus cloud. **ECHO PROBLEM**: Wed Dec 3 18:50:11 GMT 2003 Alice claims ECHO is not taking data. Exited echosys program and restarting--actually doing a partial shutdown procedure. WEATHER COMMENT: Wed Dec 3 18:55:26 GMT 2003 Sun just cleared cloud. Starting up. Wed Dec 3 18:55:44 GMT 2003 MKIV Start Patrol MKIV COMMENT: Wed Dec 3 18:55:50 GMT 2003 Centered O1. Wed Dec 3 18:56:12 GMT 2003 CHIP Start Patrol Wed Dec 3 18:56:22 GMT 2003 PICS Start Patrol ECHO COMMENT: Wed Dec 3 18:56:45 GMT 2003 Time OK. PSPT COMMENT: Wed Dec 3 19:06:37 GMT 2003 Observing. Wed Dec 3 19:07:53 GMT 2003 MKIV End Patrol Wed Dec 3 19:08:04 GMT 2003 MKIV Start Cal Wed Dec 3 19:27:40 GMT 2003 MKIV Start Patrol **ECHO PROBLEM**: Wed Dec 3 19:50:22 GMT 2003 After restart, guider head was pointing about 30-degrees below where sun was in the sky. Alice is speculating a set screw may be loose. I tried applying a little bit of torque to the head but it appeared tight. Alice is looking for Clarke for any advice and directions (no mechanical documentation for ECHO at MLSO). **ECHO PROBLEM**: Wed Dec 3 20:16:39 GMT 2003 Alice and I ran another set of fix attempts and found that the "Set the current position of HA to zero (use caution)" instruction was not working. May be commented out. When we checked position of head and current HA position after initializing HA and Dec, a step we did not do the first go-around, the head was still pointing up and the HA position was at 27.98-degrees according to the "Check HA position" window. Alice is looking thru the code to re-enable the zeroing code. **ECHO PROBLEM**: Wed Dec 3 20:24:03 GMT 2003 Alice found a command that was commented out, we entered "2PZ" in the "Send command to SX compumotor" window and checked the HA position, both physically and in the Check HA position window. Head was pointing up and position indicated 0.00 degrees. Re-initializing HA and DEC. **ECHO PROBLEM**: Wed Dec 3 20:36:06 GMT 2003 Restarted echosys and started observations. Head still went to about 30 degrees below where sun is. Alice will contact Clarke and we may try to open ECHO up and look for a loose set screw. MKIV COMMENT: Wed Dec 3 20:41:05 GMT 2003 Centered O1. **** EVENT COMMENT ****: Wed Dec 3 20:48:49 GMT 2003 CME at PA 230-270 from 2034 UT. **ECHO PROBLEM**: Wed Dec 3 21:08:04 GMT 2003 Found a protractor level and measured the head angle. It is currently at 44.5 degrees above horizon. Gui not updating so I will restart it and measure head angle again. WEATHER COMMENT: Wed Dec 3 21:18:54 GMT 2003 In orographic clouds. **ECHO PROBLEM**: Wed Dec 3 21:22:54 GMT 2003 Restarted echosys and took down HA encoder value on gui (it is changing normally). HA encoder was -11.880. Measured head with protractor level less than a minute later, reading was 48 degrees. **ECHO PROBLEM**: Wed Dec 3 21:41:03 GMT 2003 HA encoder value was -7.689, a few seconds later, the head measured at 52 degrees. Due to the accuracy of the protractor vs the encoder and the time between logging the measurements, the difference was around 60 degrees for this and the earlier measurements. The head IS moving at the correct rate. The problem appears to be an offset somewhere between the encoder and the actual head position on the compumotor shaft. **ECHO PROBLEM**: Wed Dec 3 21:47:33 GMT 2003 I checked again and I cannot budge the head using nominal pushing or pulling force by hand. Without opening things up, it is my opinion that the set screws are quite tight. Wed Dec 3 23:30:28 GMT 2003 CHIP End Patrol WEATHER COMMENT: Wed Dec 3 23:32:29 GMT 2003 Fog is threatening. I am outside dealing with ECHO, racing the weather. Closed domes and halted observations as a precaution. Wed Dec 3 23:34:01 GMT 2003 PICS End Patrol Wed Dec 3 23:34:34 GMT 2003 MKIV End Patrol **ECHO PROBLEM**: Thu Dec 4 01:36:19 GMT 2003 The good news--ECHO is working. Images are appearing in image window. I finally found the set screw after opening a bunch of hatches--there was some confusion about up/down, top, etc. Alice finally found and faxed a drawing to me and things moved along. I removed the compumotor cover and loosened the setscrew after setting the HA to zero and turning off the echosys program. I loosened the set screw (which was snug, but not tight) and removed the motor without turning anything. Next, I turned off instrument power and rotated the guide head until it was pointing straight up. This step was quite difficult. The head rotated in a choppy manner and it appeared to seize up near vertical. I could not turn it either way, nor could I get the set screw to align with the access hole. Sprayed some WD-40 into the bearings and removed part #29. Cleaned and lubed part 29. I aligned the guider head to zero degrees with part 29 off and wedged a tool under the head to maintain position. I rotated the set screw around to face the access hole when part 29 would be replaced, and replaced part #29. Inserted compumotor shaft back into the guide head coupler and tightened down the set-screw. Now the bad news--when I tried to tighten the set screw with the short end of the allen wrench inserted, the set screw head just twisted off with not very much torque. Definitely not enough torque to twist apart a stainless steel screw. The screw must have been defective or someone must have really applied a lot of torque to tighten or loosen it sometime before. I think the set screw was tight before twisting apart. Reassembled the head and restarted echosys. Tested SX movement and convinced myself that things were moving in both directions and that I could get back to zero and the head angle was confirmed with the protractor-level. When I restarted the observation program, I could sight over the top of the guide head and see the sun aligned with the head. There were no images, though. I did a partial shutdown and started back up. IMAGES!! **ECHO PROBLEM**: Thu Dec 4 02:11:36 GMT 2003 Ugh, images not appearing on gui again. Checked head pointing with HA on gui and the angle corresponds nicely. I can visually sight the sun over the top (side) pf the guide head so I am comfortable that the HA is correct and the SX is driving the head OK with no slip. Sun is in the clear at this time, btw. **ECHO PROBLEM**: Thu Dec 4 02:39:19 GMT 2003 Restarted from partial shutdown again. This time the first partial images appeared near the left edge of the image window and were gone by the second image. HA slipping by small but significant amounts? Turning ECHO off for the night (quitting echosys). COMMENT: Thu Dec 4 02:41:49 GMT 2003 Shutting down the rest of the way (domes still closed and instruments just halted) and going home. Thu Dec 4 02:47:46 GMT 2003 MkIV 18_55.rawmk4 20_02.rawmk4 20_58.rawmk4 21_54.rawmk4 22_50.rawmk4 18_58.rawmk4 20_05.rawmk4 21_01.rawmk4 21_57.rawmk4 22_53.rawmk4 19_01.rawmk4 20_08.rawmk4 21_04.rawmk4 22_00.rawmk4 22_56.rawmk4 19_04.rawmk4 20_11.rawmk4 21_07.rawmk4 22_03.rawmk4 22_59.rawmk4 19_11.rawmk4 20_14.rawmk4 21_10.rawmk4 22_06.rawmk4 23_01.rawmk4 19_17.rawmk4 20_17.rawmk4 21_13.rawmk4 22_09.rawmk4 23_04.rawmk4 19_23.rawmk4 20_20.rawmk4 21_16.rawmk4 22_12.rawmk4 23_07.rawmk4 19_27.rawmk4 20_23.rawmk4 21_19.rawmk4 22_14.rawmk4 23_10.rawmk4 19_30.rawmk4 20_26.rawmk4 21_22.rawmk4 22_17.rawmk4 23_13.rawmk4 19_33.rawmk4 20_29.rawmk4 21_25.rawmk4 22_20.rawmk4 23_16.rawmk4 19_36.rawmk4 20_32.rawmk4 21_28.rawmk4 22_23.rawmk4 23_19.rawmk4 19_39.rawmk4 20_35.rawmk4 21_30.rawmk4 22_26.rawmk4 23_22.rawmk4 19_42.rawmk4 20_38.rawmk4 21_33.rawmk4 22_29.rawmk4 23_25.rawmk4 19_45.rawmk4 20_41.rawmk4 21_36.rawmk4 22_32.rawmk4 23_28.rawmk4 19_48.rawmk4 20_44.rawmk4 21_39.rawmk4 22_35.rawmk4 23_31.rawmk4 19_51.rawmk4 20_46.rawmk4 21_42.rawmk4 22_38.rawmk4 c19_08.rawmk4 19_54.rawmk4 20_49.rawmk4 21_45.rawmk4 22_41.rawmk4 c19_14.rawmk4 19_57.rawmk4 20_52.rawmk4 21_48.rawmk4 22_44.rawmk4 c19_20.rawmk4 20_00.rawmk4 20_55.rawmk4 21_51.rawmk4 22_47.rawmk4