[evlatests] More troubles with Referenced Pointing

[Bryan Butler]

What elevation?


Rick Perley wrote on 12/17/18 16:57:
>      I've looked at the referenced pointing data from my 17B-053 science 
> run, taken Friday morning.
> 
>      Two significant issues have been identified:
> 
>      1) New-ACU antennas are being incompletely flagged when moving from 
> one position to another.
> 
>      2) All antennas have overshoots and oscillations, which are not 
> flagged. For some new-ACU antennas and some positions, these 
> oscillations last longer than the 20 seconds allotted to each position. 
> (The period of these is about 10 seconds -- far from the resonant period 
> of the antennas themselves).
> 
>      Note that these erroneous data -- because they are not flagged -- 
> are being utilized for the pointing solutions.  In most cases, the 
> effects are not especially large.  But I think we can, and should, do 
> better.
> 
>      My suggestion is to utilize only the last 10 -- 12 seconds of each 
> position, regardless of the flags.
> 
>      Because 'a picture is worth 1000 words', I've attached a 
> three-slide pdf, showing some of the data.
> 
>      Hichem and Vivek are looking into these issues.
> 
> 
>      Rick
> 
> 
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