Constellation of non-geostationary satellites providing...

Details Constellation of non-geostationary satellites providing... Constellation of non-geostationary satellites providing...

H - Electricity

04

B

H04B 7/195 (2006.01) B64G 1/10 (2006.01) B64G 1/24 (2006.01) G01C 21/02 (2006.01) G01S 5/14 (2006.01)

Patent

CA 2208934

The invention concerns a communication system and/or navigation system based on a constellation of non-geostationary satellites orbiting the Earth. The constellation is grouped by pairs of satellites (S1,S1'), (S2,S2') and of orbital planes (P1,P1'), (P2,P2'). The pairs of orbital planes are separated by an angle (delta) different from the separation (alpha) between the orbital planes within each pair and the satellites (S1,S1') within each pair present an orbital phase displacement (beta) different from the orbital phase displacement (gamma) between the satellite pairs of different orbital plane pairs. This type of constellation provides continuous coverage of a given geographic area of interest by at least one satellite taking into account the frequency coordination requirement.

L'invention concerne un système de communication et/ou de navigation basé sur une constellation de satellites non géostationnaires en orbite autour du globe terrestre. Cette constellation présente un regroupement par paires des satellites (S1,S1'), (S2,S2') et des plans orbitaux (P1,P1'), (P2,P2'). Les paires de plansorbitaux sont espacées entre elles d'un angle (.delta.) différent de l'espacement (.alpha.) entre plans orbitaux d'une même paire et les satellites (S1,S1') d'une même paire présentent un déphasage orbital (.beta.) différent du déphasage orbital (.gamma.) entre paires de satellites de paires de plans orbitaux différents. Ce type de constellation permet d'assurer une couverture permanente, par au moins un satellite, d'une zone géographique d'intérêt en tenant compte de la contrainte de coordination de fréquence.

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