Communications: directive radio wave systems and devices (e.g. – Directive – Including antenna orientation
Reexamination Certificate
2005-08-16
2005-08-16
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including antenna orientation
C342S354000, C342S355000
Reexamination Certificate
active
06930636
ABSTRACT:
Methods and structures are provided for reducing pointing errors ζ of satellite antennas and for generating broad field-of-view satellite attitude acquisition patterns. In one method embodiment, satellite transmit beams have estimated pointing attitudes β and are transmitted to overlap on a ground-based receiving terminal which has a known terminal location λ and which measures received signal strengths α. Pointing errors ζ of the transmit beams are then determined from the estimated pointing attitudes β, the terminal location λ and the signal strengths α and the pointing errors ζ are subsequently reduced by revising the pointing attitudes β. Other method embodiments utilize known signal-strength functions and antenna signals with known signal parameters such as frequencies and/or modulations.
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Gregory Bernarr E.
Koppel, Jacobs Patrick & Heybl
Mull F H
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