Interferometric synthetic aperture detection of sparse non-surface objects

摘要: A technique for detecting non-surface objects from a moving platform using radiant ranging. The moves perpendicular to line through pair of first and second transducers. transmitter repeatedly transmits signal via transducer. return reflection signals in both transducers include sparse the presence surface clutter reflections. Respective synthetic aperture complex images resolution cell slant range Doppler frequency are formed received reflections two phase factor between each absence is determined. This feasible because sparse, that rare generally encountered individually. Each image multiplied with conjugate corresponding said factor. resulting product subtracted image. non-zero (except order effects) only reflecting target. may employ third transducer permitting detection at otherwise blind heights.