2016/03/31 by Shiro Ikeda, Fumie Tazaki, Kazunori Akiyama +2 · 20 citations
Computer Science · Engineering · Physics and Astronomy · #Adaptive optics and wavefront sensing #Algorithm #Astronomy #Calibration #Closure (psychology) #Computer science #Data mining #Geology #Interferometry #Measure (data warehouse) #Optical measurement and interference techniques #Optics #Phase (matter) #Phase retrieval #Physics #Process (computing) #Remote sensing #Structural Health Monitoring Techniques #Very-long-baseline interferometry #Visibility #Wavelength #astro-ph.IM
paper · pdf · doi:10.1093/pasj/psw042
published in Publications of the Astronomical Society of Japan 68(3) (Oxford University Press) · 9 pages, 4 figures, accepted for publication in PASJ
arxiv created 2016/04/09 · openalex publication_date 2016/04/19 · arxiv updated 2018/07/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract For short-wavelength VLBI observations, it is difficult to measure the phase of the visibility function accurately. The closure phases are reliable measurements under this situation, though it is not sufficient to retrieve all of the phase information. We propose a new method, phase retrieval from closure phase (PRECL). PRECL estimates all the visibility phases only from the closure phases. Combining PRECL with a sparse modeling method we have already proposed, the imaging process of VLBI does not rely on a dirty image or self-calibration. The proposed method is tested numerically and the results are promising.