Complex sentence: The technique was subsequently further developed in Very Long Baseline Interferometry to obatin baselines of thousands of km. Aperture synthesis is also used by a type of radar system known as synthetic aperture radar, and even in optical telescopes.
Split into simpler sentences: The technique was subsequently further developed in Very Long Baseline Interferometry. It is also used by a type of radar system known as synthetic aperture radar, and even in optical telescopes.