[mmaimcal]Re: [Almasci] Antenna Acceleration

[Jeff Mangum]

Hi Folks,

I think that the discussion regarding antenna performance should focus
on the requirements rather than how those requirements are met.
Asking questions about how a specification might be met is
interesting, but "getting the cart before the horse".

So, a more useful exercise would be to do a better job of specifying
the fast motion requirements (fast switching, total power OTF, and
interferometric OTF).  What is missing in the current prototype
antenna specs are things like:

-- Duty cycle for OTF.

-- Specific turnaround time for OTF.

-- Tracking tolerance.

For example, saying that the antenna should turn around during an OTF
raster "as fast as possible" is not a specification.  This requires a
number, which should derive from a duty cycle requirement.

Once a requirement which derives from the science is defined, then the
feasibility of these requirements can be determined.

Cheers,

Jeff