{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9651661","patent":{"patent_number":"US-9651661","title":"Methods and systems for local principal axis rotation angle transform","assignee":null,"inventors":[],"filing_date":"2015-04-09T00:00:00.000Z","publication_date":"2017-05-16T00:00:00.000Z","cpc_codes":["G01S","G01S"],"num_claims":15,"abstract":"A method for processing synthetic aperture radar (SAR) data. The method includes the step of receiving SAR data that has been collected to provide a representation of a target scene, and dividing the data into a plurality of sub-blocks each having a plurality of pixels, each of the plurality of pixels having a coordinate and an amplitude. A transformation performed on each of the sub-blocks includes the steps of: (i) computing a mean coordinate; (ii) subtracting the mean coordinate from the pixel's actual coordinate to arrive at a modified coordinate; (iii) multiplying the modified coordinate by the amplitude to arrive at an amplitude-modified coordinate; (iv) creating a covariance matrix using the amplitude-modified coordinates; (v) performing a singular value decomposition on the covariance matrix to arrive at a vector; and (vi) associating an angle with the calculated vector."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Methods and systems for local principal axis rotation angle transform","description":"A method for processing synthetic aperture radar (SAR) data. The method includes the step of receiving SAR data that has been collected to provide a representation of a target scene, and dividing the ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9651661","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9651661","citation_suggestion":"Patentable. \"Methods and systems for local principal axis rotation angle transform\" (US-9651661). https://patentable.app/patents/US-9651661","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9651661","json":"https://patentable.app/api/llm-context/US-9651661","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:44:05.501Z"}