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:
Jan. 24, 2006
Filed:
May. 22, 2000
Frank A. Hagen, Palos Verdes Estates, CA (US);
Richard Flammang, Manhattan Beach, CA (US);
Kar W. Yung, Torrance, CA (US);
Donald C. D. Chang, Thousand Oaks, CA (US);
Frank A. Hagen, Palos Verdes Estates, CA (US);
Richard Flammang, Manhattan Beach, CA (US);
Kar W. Yung, Torrance, CA (US);
Donald C. D. Chang, Thousand Oaks, CA (US);
The DIRECTV Group, Inc., El Segundo, CA (US);
Abstract
A wireless communication system includes a satellite constellation consisting of a plurality of satellites. Each of the plurality of satellites is in an orbit whose eccentricity and inclination are perturbed relative to the same geosynchronous orbit. Each of the satellites in the constellation is capable of relaying signals in either direction between a central ground hub and a plurality of mobile user terminals. The plurality of satellites are configured such that the period of their geosynchronous orbit remains substantially constant at one sidereal day.