sentences:  Two other groups had also detected circular polarization at about the same time (David Martyn in Australia and Edward Appleton with James Stanley Hey in the UK).Modern radio interferometers consist of widely separated radio telescopes observing the same object that are connected together using coaxial cable, waveguide, optical fiber, or other type of transmission line.This not only increases the total signal collected, it can also be used in a process called aperture synthesis to vastly increase resolution.