[evlatests] Pointing Gone Wild -- May 2020 Edition

[Ken Sowinski]

On Wed, 1 Jul 2020, rperley via evlatests wrote:
>
> The amplitude of this effect (notably ea25 in the 2020 data, and on ea18 in 
> the 2019 data) suggests that this is a software-driven offset -- the 
> antennas, for whatever reason, were told to move off source.  But perhaps 
> somebody can provide an alternate explanation.

Sure.  Atl east for ea25.  Ever since this antenna had a bearing
replacement years ago we have been struggling to explain anomalous
poiting associated with a particular azimuth.  There is a small Az
range where the pointing changes by about an arc-min, as you say,
mostly in elevation.  ea25 is the best example, but there are other
antennas with similar behavior.  Notes aobut others are in my
inaccessible office.

Ken