[evlatests] Recent history of VLA-VLA phase jumps

[Ken Sowinski]

On Tue, 10 Oct 2006, Michael Rupen wrote:

> CONCLUSIONS
>   * many scans/antennas show 10-20d drift and/or phase jumps within a
>     scan (<2 mins.), when SNR is sufficient to see such
>   * VLA in-scan phase jumps definitely present by 2oct06
>   * VLA between-scan phase jumps definitely present by 26sep06
>   * EVLA in-scan phase jumps come and go, as expected for an evolving
>     system. As of  7oct06 ant. 16 showed two-state phases with a phase
>     diff. of 70degs between them (as seen in AC-BD).

I have elided Michaels detailed summary and note that his
observation of Sept 26 was before we installed the new system
controller.  Agreed many of his examples were after that, but
so were most of his observations.