Unless an antenna resolves the a strong source,
its size is largely irrelevant!
 The sensitivity of the VLA is no better than
FASR for sources unresolved by the antennas.
 The VLA will be more sensitive than FASR for
quiet Sun studies (but this does not mean that
FASR cannot do excellent QS studies)
We should choose our antenna size(s) based on
sampling in the uv plane and consideration of QS
studies (at high frequencies).