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operations:agenda2016_06_23 [2016/06/23 00:34]
Arwin Kahlon
operations:agenda2016_06_23 [2016/06/24 04:27] (current)
Arwin Kahlon
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 **Chair/​Presenting:​** Arwin/Bryn **Chair/​Presenting:​** Arwin/Bryn
  
-**Attendees:​** Lucas, Jonny, Tiege, Bryn, Jim, Arwin, Ellen,Ross, Nick, Lucia, Jamie, Liz+**Attendees:​** Lucas, Jonny, Bryn, Arwin, Ellen, Nick
  
 +**Not Attending:​** Tiege, Liz, Ross, Jesse, Lucia, Jamie, Jim
  
-**Not Attending:**  +**General Issues:** 
- +  Reminder for everyone to check the calendars carefully as we had a missed start shift this week. 
-**Issues/​Minutes:​*+  * aug024 Yg startup message had no temp/​humidity – don't forget it needs to be entered manually! ​**(Add this to the wiki)**
-  * aug024 Yg startup message had no temp/​humidity – don't forget it needs to be entered manually!+
   * Use schedule=<​exp>,#<​line_num>​ when recovering from a long halt rather than cont   * Use schedule=<​exp>,#<​line_num>​ when recovering from a long halt rather than cont
   * Upcoming LBA (?) experiments v486i, v252bb, v493c   * Upcoming LBA (?) experiments v486i, v252bb, v493c
-  * Problems with mk5ke during the t2111 experiment. Problem persisted through reboot ​and power cycles, also present when using jive5ab. recover did not correct ​the problem. +  * Ellen, Bryn and Arwin volunteer for the July the 2nd shift.
-  * The following two autocorrelations,​ are they okay? +
-{{: operations:​1506ut_yg.png?​200 |}}{{: operations:​1506ut_ke.png?200 |}}+
  
-**Issues ​listed in the handover notes.**+**Issues ​taken from handover notes** 
 +  * Problems with mk5ke during the t2111 experiment. Problem persisted through reboot and power cycles, also present when using jive5ab. recover did not correct the problem. **(persistent problem with the recorder at ke)** 
 +          - Jamie'​s resposne "There were two problems with the Mark5 at Katherine. On Wednesday, the module that we were recording to became read-only, and all attempts to record to it failed with "​XLRappend"​ errors. We didn't have a second module available in mk5ke, but there was a second empty module available in mk5-2ke. So, I changed the /​usr2/​control/​mk5ad.ctl file to use mk5-2ke as the recorder for the remainder of the T2111 experiment - the mark5 problem this morning was caused by this. Mick had swapped modules and restarted the mark5 units so that we could use mk5ke for recording again, while mk5-2ke was conditioning another module. DIMino was not running on mk5-2ke, which lead to the mk5cn errors in the FS. I fixed it this morning by terminating the FS, editing /​usr2/​control/​mk5ad.ctl to use mk5ke again, and restarting the FS." 
 +  * "​Massive delay difference, clkoff was very high (order of e-01), mk5 was about 0.5s out of sync, but reported a sync error of 0. Counter and fmset didn't fix it so restarted the DBBC. That fixed the delay but then the field system crashed and had to be restarted."​ AUG025, 14/06/2016. **(Not a problem, was resolved.)** 
 +  * Yg disk_pos loosing ~10 gb every 2 hours. AUG025, 14/06/2016. **(not sure why this was, escalate to Jamie)** 
 +            - Jim's response "This may be an issue with the schedule being a little more optimistic on how much time is needed for pre-scan calibration (or similar), meaning recording always starts a little late. This is also a higher data rate experiment than our usual ones so you lose more data per unit time if things run late. I know that scheduling optimisation is something that Lucia, Davis et al have been working on for the AUG/AUA sessions. No doubt the logs will help them fine tune things some more."
  
-  * "​Massive delay difference, clkoff was very high (order of e-01), mk5 was about 0.5s out of sync, but reported a sync error of 0. Counter and fmset didn't fix it so restarted the DBBC. That fixed the delay but then the field system crashed ​and had to be restarted."​ AUG025, 14/06/2016. +  * Any persistent issues with DBBC delays? r4743 09/​06/​2016 ​and r1743 07/​06/​2016. ​**(No issues since)** 
-  * Yg disk_pos loosing ~10 gb every 2 hours. AUG025, 14/06/2016.+  * The following two autocorrelationsare they okay? **(Bands 1 and 14 at ke are dodgey, Jamie to fix. If these autocorrelations were persistent, DBBC reconfiguration would be required)** 
 +{{: operations:​1506ut_yg.png?​200 |}}{{: operations:​1506ut_ke.png?200 |}}
  
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