The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 2023
Filed:
Feb. 20, 2019
Japan Aerospace Exploration Agency, Tokyo, JP;
Toshihiro Sezai, Tokyo, JP;
Japan Aerospace Exploration Agency, Tokyo, JP;
Abstract
An observation apparatus includes a signal processing unit that 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.