CPC G01S 7/02 (2013.01) | 9 Claims |
1. An observation apparatus, comprising
an antenna system comprising an antenna; and
a processor in operable communication with the antenna, wherein the processor
performs, using a square root signal of a received electric power signal from an antenna whose beam is scanned within a predetermined azimuthal angle range and a signal of an azimuthal angle of the scanned beam, a Fourier transform with respect to the azimuthal angle on the square root signal,
divides a first azimuth frequency signal by a second azimuth frequency signal, the first azimuth frequency signal being obtained by performing the Fourier transform, the second azimuth frequency signal being obtained by performing a Fourier transform with respect to the azimuthal angle on a square root signal of an antenna electric power pattern, and
fits the divided signal with exponential functions including real parts and imaginary parts in arguments by using Prony's method.
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