Manufacture D'appareillage Electrique De Cahors

Olivier Dhellemmes

Frederic Laplace-Treyture

A method of pointing a fixed antenna ( ) having a reflector ( ) and at least one transceiver source suitable for aiming at a plurality of satellites situated between two extreme positions S , S on a geostationary orbit ( ). According to the invention, the transceiver source is offset on the focal line ( ) of the antenna ( ) through a distance d from the middle of the focal line ( ) so as to aim at one of the extreme positions S , S , the distance d being determined as a function of an angle &agr; formed between a first line connecting the origin O of the focal axis of the reflector ( ) to the target extreme position and a second line connecting the origin O to the middle position S of the geostationary orbit, the reflector ( ) is turned through the angle &agr; about an axis D perpendicular to the plane containing the focal line ( ) and the origin O of the focal axis, and then the roll angle is adjusted by turning the antenna ( ) about its own axis pointing to the satellite situated at the target extreme position, so as to aim at the other extreme position and bring the focal line ( ) into alignment with the set of satellites situated between the positions S , and S .

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Cahors, France

Olivier Dhellemmes