Abstract

The SkyBridge space segment, based upon Low Earth Orbit satellites, had to face a challenge: though using the same frequency band as various geostationary systems in order to profit by well-proven and cost-efficient techniques — i.e. Ku Band -, SkyBridge satellites must not in any way interfere with geostationary satellites. This “frequency sharing constraint” forces SkyBridge satellites to stop emitting (resp. receiving) towards (resp. from) any portion of the ground as soon as they are seen in alignment with the geostationary orbit from the point of view of this earth portion.

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