{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9734396","patent":{"patent_number":"US-9734396","title":"Method of refraction angle mapping of earth'S limb","assignee":null,"inventors":[],"filing_date":"2015-09-15T00:00:00.000Z","publication_date":"2017-08-15T00:00:00.000Z","cpc_codes":["G06V","G01C"],"num_claims":23,"abstract":"Refraction angles in a planet's atmosphere are mapped using a database of known star locations and a field imager onboard a platform above the planet. The field imager is positioned to observe a region that includes a portion of the planet's atmospheric limb. A star field image is captured for the region. The star field image includes stars within the field imager's field-of-view. Using the field imager and the database, a modeled star field image is generated that is matched in size to the field-of-view associated with the star field image. The modeled star field image defines absolute locations of stars corresponding to stars appearing in the field imager's field-of-view. Differences between the absolute locations and locations of the images of stars are indicative of a limb refraction angle field."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method of refraction angle mapping of earth'S limb","description":"Refraction angles in a planet's atmosphere are mapped using a database of known star locations and a field imager onboard a platform above the planet. The field imager is positioned to observe a regio","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9734396","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-9734396","citation_suggestion":"Patentable. \"Method of refraction angle mapping of earth'S limb\" (US-9734396). https://patentable.app/patents/US-9734396","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9734396","json":"https://patentable.app/api/llm-context/US-9734396","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T09:51:35.942Z"}