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:
May. 25, 2021
Filed:
Oct. 11, 2018
Nederlandse Organisatie Voor Toegepast-natuurwetenschappelijk Onderzoek Tno, s-Gravenhage, NL;
Rudolf Saathof, Nieuwegein, NL;
Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO, 's Gravenhage, NL;
Abstract
Information encoded in an uplink beam (Lu) is transmitted from transceiver () on earth () to a communication satellite () in orbit. The uplink beam (Lu) travels through an atmosphere () there between, wherein a wavefront (Wu) of the uplink beam (Lu) is distorted as a result of its propagation through the atmosphere (). The transceiver () comprises a wavefront sensor () to measure a reference distortion (Wr') of a wavefront (Wr) of a reference beam (Lr). Adaptive optics () are used to pre-correct a wavefront (Wu) of the uplink beam (Lu) prior to its transmission based on the measured reference distortion (Wr′). The reference beam (Lr) originates from a guidestar satellite () formed by a separate man-made object at a distance (D) from the communication satellite () such that the reference beam (Lr) travels through the same part () of the atmosphere () as the uplink beam (Lu).