[mmaimcal]Re: first step on compact config design evaluation

Mark Holdaway mholdawa at nrao.edu
Mon Jan 28 14:45:38 EST 2002


There is really no reason for Boone's configurations to give particularly
low sidelobes, other than the fact that Gaussian distributions will
tend to give low sidelobes.

How about this:

For a hybrid configuration which is to be optimized for some declination
range, we want to modify Kogan's algorithm to give a good beam at that
mean declination.  We also provide a number of antenna stations which are
already fixed (ie, part of the zenith compact array).  But, instead of
altering Kogan's algorithm (or Boone's algorithm) to deal with projection,
we could just pre-project the fixed stations for the mean declination,
run the optimization as if it were zenith, then take the output and
de-project it.  Can Boone's algorithm accept fixed antenna
locations?

Now, I am not sure which approach to take, better (u,v) distribution
or better beam, as I can think of arguments for both in this
situation, though I would lean towards Boone's.  In this case,
I would actually aim for a (u,v) distribution with a spike near
the center to emphasize shorter baselines. 

	-Mark






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