[evlatests] P-band Dipole Orientations

[Rick Perley]

Ther results of a polarization calibration of a recent P-band dataset (obtained via VLITE) indicate a significant number of antennas with apparently misaligned feeds.

As this was a VLITE database, there were only 18 antennas included, one of which was out of service.  For the seventeen others, the calibration shows seven antennas misaligned by more than 5 degrees w.r.t. the reference dipole (ea01).  They are:

ea17  5.7 degrees
ea07  8.6
ea11  10.3
ea20  5.7
ea23  5.2
ea27  8.0
ea21  8.6

It is my impression (but I do not have the data in hand to prove it) that this is worse than what was seen a few years ago.

These misorientations should be easily visible from the antenna surface.  It would be good to know if visual inspection agrees with the observations.

Rick
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listmgr.nrao.edu/pipermail/evlatests/attachments/20240910/9ea67988/attachment.html>