Characterization of a dense aperture array for radio astronomy
  EMBRACE@Nancay is a prototype instrument consisting of an array of 4608 densely packed antenna elements creating a fully sampled, unblocked aperture. This technology is proposed for the Square Kilometre Array and has the potential of providing an extremely large field of view making it the ideal survey instrument. We describe the system,calibration procedures, and results from the prototype. 
S.A. Torchinsky, A.O.H. Olofsson, B. Censier, A. Karastergiou, M.   Serylak, P. Picard, P. Renaud, C. Taffoureau
astro-ph.IM