Alcatel Espace

Sagem Defense Securite

Frederic Berthault

Denis Rouffet

Yannick Tanguy

Michel Mazzella

Philippe Patry

Thibault Augey

The invention concerns an opto-electronic device for observing and/or aiming at a scene comprising a target (C), comprising The invention also concerns a telemetry method implemented on such a device.

Optoelectronic device for observing and/or aiming at a scene, comprising a rangefinder, and related range-finding method

In a method of handing off traffic in a low orbit satellite communication system serving terminals, a terminal being connected to a terrestrial communication network by means of a connection station, handing off of the satellite-terminal and satellite-connection station links is possible only within a particular area. The decision to hand off the traffic is based on deterioration of the quality of service and of the radio environment for a group of terminals of said area. The system for implementing this method includes transmit/receive terminals and terrestrial connection stations.

Method of handing off traffic in a low orbit satellite communication

The present invention relates to a communications system between low-orbit satellites and terminals, in which the beams (12) of each service area (14) are illuminated according to a beam-hopping spatial scanning. For each satellite and for each terminal transmission and reception are separated in time and synchronized. Time-division duplex is used. Applicable especially to the field of space telecommunications.

Growing community of inventors

Paris, France

Frederic Berthault