[evlatests] Modcomp-free tests, continuum

Ken Sowinski ksowinsk at nrao.edu
Fri Jun 15 13:50:21 EDT 2007


On Fri, 15 Jun 2007, Rick Perley wrote:

>    A single antenna phase problem is visible:
>          Antenna 26 -- all IFs, have remarkable steps in phase, which
> occur only on 10-second boundaries.  Not every multiple of 10 seconds
> has a step, but most do.  All IFs behave in an identical manner.  The
> effect is very clear at K-band, where the step size is typically 50
> degrees (the jump is not a constant value).  The effect is present, but
> much harder to discern at X-band, typically 10 degrees.  (It may scale
> with frequency, but it's not convincing).

This is the RT phase correction derived from an errant
L352.  The RT phase data from this antennas has been
turned off.  Vivek will survey the other antennas to
make sure no others are reporting bad data.




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