[evlatests] L301 nice/naughty update

[Vivek Dhawan]

Not much different than before. Hardware has changed, especially on
ea11 and 19, so they are worth noting. All phase variations are at
13 GHz, and have errors of ~10 deg, so the good ones are really
just upper limits. (This is best done in D array!)

ea17, 11, and 19 vary by 60, 50, 40 degrees respectively.

ea3, 5, 18, 28 are under 10deg, as good as VLA antennas 8, 10, 12.

the rest of the EVLA is in between, about 15-25 deg.


Vivek Dhawan wrote:
> Based on the tests detailed below, the EVLA antennas with BAD L301s
> (~60 deg phase change over full elevation range) are: ea11, 17, 21.
> 
> GOOD L301s (factor 3-4 better) are: 1, 5, 13, 14, 19.
> 
> In between lie ea23, 24, and 26.
> 
> These tests were done in late August. Based on this evidence, Keith
> got the hardware to use the modified round-trip phase system to look
> at changes in the L301 phase vs elevation. The setup is only on ea19
> (or is it ea11?)
> 
> The combination of L and X-band baseline runs gets the data on all
> L301's simultaneously. I am doing this tonight to and will circulate
> an updated list.
> 
> Vivek.