title: Closure phase and lucky imaging.
abstract: Since its introduction by Jennison in 1958, the closure-phase method for removing the effects of electrical path-length errors in radio astronomy and of atmospheric turbulence in optical astronomy has been based on the non-redundant-spacing triple interferometer. It is shown that through application of lucky imaging concepts it is possible to relax this condition, making closure-phase methods possible with redundantly spaced interferometer configurations and thereby widening their range of application. In particular, a quadruple-interferometer can, under lucky imaging conditions, be treated as though it were a triple interferometer. The slit-annulus aperture is investigated as a special case.
authors.affiliation: Imaging Technology Center and Department of Electrical Engineering, Florida Atlantic University, 777 Glades Road, Boca Raton, Florida 33431, USA. wrhodes@fau.edu
authors.forename: William T
authors.initials: WT
authors.lastname: Rhodes