Changes between Version 2 and Version 3 of PS1_timing_problems

Timestamp:

Jul 21, 2016, 10:30:32 AM (10 years ago)

Author:

eugene

Comment:

--

PS1_timing_problems

@@ -5 +5 @@
  * Between 2015.04.26,16:45 HST and ~2015.05.12,12:00 HST the clocks on the camera readout computers drifted out of NTP lock, accumulating ~113s before the problem was fixed.  A table of corrections for the affected images was produced by Craig Rae by using information from one camera computers which did not drift.  
 
+ * From 2015.07.01 to 2015.08.11, some IPP machines received a corrupted version of /etc/localtime, which resulted in incorrect values for SHUTOUTC for data processed on those machines.  The smf primary header depends on the XY01 chip, so a fraction of the smfs in this period have the wrong SHUTOUTC values.