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operations:minutes2013_08_29 [2013/08/29 05:10]
Jim Lovell
operations:minutes2013_08_29 [2013/08/29 05:10] (current)
Jim Lovell
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     - Items arising:     - Items arising:
       - Hb has had a couple of experiments recently where data were lost because the delay through the DBBC and Mark5 was unstable and drifting. The only solution seems to be power-cycling the DBBC. Please keep a close eye on the delay difference. [[operations:​starting_monitoring_9.10.5|Documentation on what to look out for and how to monitor it is here]]. See the section "​clkoff reading is drifting or far from the maser-GPS offset"​.       - Hb has had a couple of experiments recently where data were lost because the delay through the DBBC and Mark5 was unstable and drifting. The only solution seems to be power-cycling the DBBC. Please keep a close eye on the delay difference. [[operations:​starting_monitoring_9.10.5|Documentation on what to look out for and how to monitor it is here]]. See the section "​clkoff reading is drifting or far from the maser-GPS offset"​.
-    ​- Hobart 26m : We are experiencing occasional formatter problems which Jamie suspects are due to timing distribution issues. Further investigation is needed (action: Jamie, Brett) +      ​- Hobart 26m : We are experiencing occasional formatter problems which Jamie suspects are due to timing distribution issues. Further investigation is needed (action: Jamie, Brett) 
-    - On one or two experiments recently we've been getting close to module capacity or just going over. More care needed to make sure modules are big enough (action Jim, Jamie) +      - On one or two experiments recently we've been getting close to module capacity or just going over. More care needed to make sure modules are big enough (action Jim, Jamie) 
-    - Sometimes we send Hb or Ho data to Japan for Ultra-rapid experiments. Sometimes we forget to notify observers that they are on, and, as the procedure files are slightly different, no data are sent on the network. Ultra-Rapid experiments should be tagged in the schedule and observers notified (action Jim) +      - Sometimes we send Hb or Ho data to Japan for Ultra-rapid experiments. Sometimes we forget to notify observers that they are on, and, as the procedure files are slightly different, no data are sent on the network. Ultra-Rapid experiments should be tagged in the schedule and observers notified (action Jim) 
-    - The Ke control room needs an internal light that can be turned on/off remotely so observers can read the Mark5 module VSNs at night. (Action Brett, Martin) +      - The Ke control room needs an internal light that can be turned on/off remotely so observers can read the Mark5 module VSNs at night. (Action Brett, Martin) 
-    - Yg earthing has been changed recently (following Brett'​s maintenance visit, completed July 31) and there'​s been a great improvement. However there were multiple clock drifts/​jumps during R4599 and another one after setup for CRF77, but before it started, then again at ~04:15 UT (0.03 us). Please continue to watch out for clock jumps and note times. More discussions with MOBLAS staff needed to try and improve things.+      - Yg earthing has been changed recently (following Brett'​s maintenance visit, completed July 31) and there'​s been a great improvement. However there were multiple clock drifts/​jumps during R4599 and another one after setup for CRF77, but before it started, then again at ~04:15 UT (0.03 us). Please continue to watch out for clock jumps and note times. More discussions with MOBLAS staff needed to try and improve things.
   - Roster   - Roster
     - Please let Jim know if you have any questions     - Please let Jim know if you have any questions
/home/www/auscope/opswiki/data/pages/operations/minutes2013_08_29.txt · Last modified: 2013/08/29 05:10 by Jim Lovell