The Circular Synthetic Radar

A new type of synthetic radar, the circular synthetic radar, uses a simple interferometer whose elements are mounted at the ends of a horizontal boom rotating about a vertical mast. Pulses are radiated alternately ¿in-phase¿ and in ¿phase-quadrature.¿ The returning echoes are also detected incoherently, both ¿in-phase¿ and in ¿phase-quadrature.¿ The four distinct outputs are fed into an on-line computer which, after a Fourier analysis, synthesizes a mapping function of the azimuthal distribution of targets.