Abstract: An imaging radar system for an aircraft includes four transmit antennas, connected to a central transmitter, and four receive antenna arrays for respectively receiving reflections of signals transmitted by the transmit antennas. A receiver circuit, associated with each antenna element of each receive antenna array, heterodynes the received signal to yield a resultant signal and combines the resultant signal with a reference signal to yield an interference grating signal. The grating signal of each receiver circuit is digitized and provided to a central processing unit that performs a spatial Fourier transform on the grating signals to determine angles of reflecting objects relative to each receive array.