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:
Mar. 24, 2015
Filed:
Nov. 13, 2012
Ruag Schweiz Ag, Zürich, CH;
Felix Andreas Arnold, Altdorf, CH;
Thomas Dreischer, Opfikon, DE;
RUAG Schweiz AG, Zurich, CH;
Abstract
Optical communications system () and method for transmission of payload data (PD) from a low earth orbit satellite () to an optical ground terminal (), the low earth orbit satellite () being connectable with the optical ground terminal () via an optical downlink channel (DL), and the optical ground terminal () being connectable with the low earth orbit satellite () via an uplink channel (UC); wherein said uplink channel (UC) is an acquisition and tracking beacon channel by means of a ground beacon (GB) controlled by a point-acquisition-track subsystem (PAT), the ground beacon (GB) comprising a wide angle beam (W) for acquisition and a guidance beam (G) for tracking; and wherein the ground beacon (GB) for the uplink channel (UC) is a pulse position modulated PPM channel.