[evlatests] Multiple Configurations ...

Ken Sowinski ksowinsk at nrao.edu
Tue Jan 26 13:25:44 EST 2016


On Tue, 26 Jan 2016, Rick Perley wrote:

>    The explanation for the multiple 'configurations' is clear, but another 
> question is raised ...
>
>    There were 5 antennas moved yesterday.  It's clear that each time an 
> antenna was taken out, another 'configuration' was made.  At P-band, five 
> different configurations resulted.
>
>    However, the antenna files for each of the five are identical -- the fact 
> that antennas were taken out of service for a while, then reappeared later in 
> a different place, didn't reach the Executor. Indeed, the first of the five 
> P-band files contains the data taken at the beginning of the run (with all 27 
> antennas in the original positions), and the data at the end of the run, when 
> five of them were in new positions.  The other four databases all correspond 
> to short periods of time during which the actual number of antennas available 
> was less than 27.  Yet all five databases have the same AN file.
>
>    There's no harm in this, as the new antennas provided no fringes after 
> having been replanted.

I checked with the operator of yesterday who verified that when the
antennas were put back in service (whether they should have been is
another question) parminator and the executor were updated to the
new pad.  If, as Rick reports, the moved antennas appear to be at
their original pads, then MCAF or the filler chain must have 
caused it.



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