EOP ERROR:

The Earth Orientation Parameters (EOP) used on the VLBA correlator are 
normally updated daily from a Goddard site. There was a period between 
about March 19 and April 24 when this automated process was not working 
and that fact was not noticed.  Observations whose correlator job 
scripts were made during that period were likely to have been correlated 
using rather long look-ahead values of EOP, rather than measured values. 
Job scripts are prepared after the observation and usually shortly 
before correlation.  From past experience, we know that using predicted 
EOP can adversely affect phase referencing projects.  Affected users 
will be notified directly.  Any users who care about relative phase 
between sources should run the EOP correction routines.  In AIPS this is 
done with the procedure VLBAEOPS (loaded with VLBAUTIL) or with CLCOR, 
the main task called by VLBAEOPS. In practice, all users who care about 
phases, usually for phase referencing, should make this correction a 
normal part of their processing in order to have the best possible EOP 
values.