FFT Processor as a digital lens for radio patrol camera in astrophysics

FFT processor has been constructed as a directional finding tool in the pilot system of Waseda Radio Patrol Camera for radio astronomical use. The pilot system is an eight elements interferometer, which has eight amplifiers and sixteen A/D converters operating at 20 MHz each. Obtained eight complex signals are parallely Fourier transformed by the present FFT processor to receive the radio brightness distribution of the sky. We discuss here (a) A Large Field Radio Patrol Camera for Astrophysical Use, (b) FFT Processor as a Digital Lens, and (3) The Present FFT Processor.