[evlatests] EVLA Misbehavior Last Night

[Vivek Dhawan]

14  and 16 have residual phase vs. elevation of about the
magnitude you report. I have not tried to fit their baselines
(april 18th data) since it was a truncated run. I suppose I
should use what I have and see if it improves things.

21 moved, no baseline run yet.

the other EVLA antennas have good baseline positions.

The RTP meters show nothing amiss at those times.(other than
known woes that Keith will fix on the next maint day.)

Rick Perley wrote:

> 
>     2)  I had a fairly long slew between two sources -- a change in 
> azimuth of 70 degrees, and a lowering of elevation from 71 to 35 
> degrees.  Subsequent sources were also at a low elevation.  When the 
> antennas arrived the source, notable changes in phase had occured on some:
> 
>     * Antenna 14 phase decreased by 100 degrees (all IFs)
>     * Antenna 16 phase increased by 20 degrees. 
>     * Antenna 21 phase increased by 100 degrees. 
>    
>     All others (except 24, for which no measurement could be made), 
> showed no discernible change. 
> 
>     Question to RT phase experts, and temperature-elevation experts:  
> Are these changes compatible with expected sensitivities?  (Note that 
> antennas 13, 14, 18, and 24 are stated to have RT phase installed and 
> working). 
>