Method for enhancing the performance of a satellite communicatio

Details Method for enhancing the performance of a satellite communicatio Method for enhancing the performance of a satellite communicatio

1998-10-30

2000-11-21

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

342354, 342359, H04B 7185, H01Q 300

Patent

active

061509779

ABSTRACT:
The present invention provides a method for determining antenna pointing error of a satellite antenna (702-716) that produces at least one spot beam having a corresponding gain pattern. The method obtains from a first unique location (510) on the ground a first measurement of a spot beam strength for a first cell (502). Similar measurements are obtained at second and third unique locations (512, 514). Attitude component errors, for example the roll or pitch attitude component errors may then be determined. The method may further determine a yaw attitude component error based on fourth, fifth, and sixth measurements of spot beam strength made from unique locations (616-620) in a second cell (604) also generated by the antenna. Additional measurements may be collected in each beam at unique locations (510-514, 516-520, 610-614, 616-620) and averaged to reduce the temporary or zero means effects of rain, scintillation, or other atmospheric conditions on the spot beam strength. Furthermore, the method may transmit any of the measurements to a central processor (422) which determines the attitude component errors based on the measurements.

REFERENCES:
patent: 4599619 (1986-07-01), Keigler et al.
patent: 4630058 (1986-12-01), Brown
patent: 4910524 (1990-03-01), Young et al.
patent: 5697050 (1997-12-01), Wiedman

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