[evlatests] C-band update

[Charles Kutz]

During the double maintenance days next week, FE will be totally focused 
on feed moisture problems, to the exclusion of all other 
responsibilities. Lets hope that the weather predictions are valid and 
that it is not raining.
We will try our best to determine if observed problems are due to leaks 
or condensation.


Chuck

Rick Perley wrote:
>     A test late this afternoon was done to check sensitivity of the 
> antennas at C-band.
> 
>     There is little change from three days ago.  Some EVLA antennas have 
> improved:  1, 5, 21, 24, 25, and 26 are improved, but not as good as 
> they should be.
>     Antenna 19 is seriously bad.  Not only are is the sensitivity low by 
> a factor of about 4, but the sensitivity is a strong function of 
> elevation.  I could imagine liquid water moving about as the antenna 
> tilts (the observations were taken very near transit). 
>     Antenna 13 was in the array this time -- this is the most 
> sensitivite EVLA antenna -- with Teff ~ 50 K.  Close, but not quite at, 
> the project requirements.
> 
> 
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