2012/09/04 by Eric Keto, Keto, Eric
Computer Science · Engineering · #Advanced Measurement and Metrology Techniques #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Optical measurement and interference techniques #Ultrasonics and Acoustic Wave Propagation
paper · pdf · doi:10.48550/arxiv.1209.0692
openalex publication_date 2012/09/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Array configurations built on a hierarchy of simple elements have excellent\nproperties for cross-correlation imaging interferometers including a smooth\ndistribution of measured Fourier components, high angular resolution, low side\nlobes, and compact array size. Compared to arrays with a Gaussian distribution\nof antenna separations, hierarchical arrays (H-arrays) produce beams with\nhigher angular resolution and a tighter concentration of the total power\n(encircled energy) within a smaller area around the main beam. An attractive\nfeature of H-arrays is their simplicity. The relationships between the Fourier\ncoverage and the array configuration are easy enough to understand that they\ncan be adjusted to achieve different design goals without the need for\nnumerical optimization. H-arrays will be useful for future multi-element\ninterferometers.\n