Gilat Satellite Networks Ltd.

Ivan Tsonev Ivanov

Borislav Petkov Marinov

Ilian Kirilov Stoyanov

Ivaylo Georgiev Slavkov

Daniel Mitkov Nikolov

Uzi Ram

Izhar Marinov

Rafi Heiman

A method for designing Non-Geosynchronous Orbit (NGSO) satellite constellations and NGSO satellite constellations thereof are presented. An NGSO satellite constellation may be designed to allow an earth station to perform handover between two satellites of the NGSO satellite constellation while the two satellites appear to be at about a same location in the sky relative to the earth station. In such constellation, an earth station may perform such handover between the two satellites in a Make-Before-Break fashion while the earth station may be configured to use a single, slow-tracking antenna, such as a mechanically tracking dish antenna.

Non-geosynchronous orbit satellite constellations

A mobile terminal, operational both to receive and transmit, may comprise a mobile antenna and an antenna controller that may be configured to control the mobile antenna at least for keeping it pointed towards the satellite, e.g. as the mobile terminal and/or the satellite move. Disclosed is a method that may be used by the antenna controller for optimizing the pointing of the mobile antenna, the method may be based on assessing both the reception quality and the transmission quality. This method may be used for overcoming degradation, mainly to transmission quality, that may result from squints between an optimal reception direction and an optimal transmission direction associated with the mobile antenna.

Mobile antenna tracking

A microwave antenna terminal for two-way, in-motion communication systems using geostationary or other orbit satellites, and capable of supporting two-way communication in two different frequency ranges, for example Ku and Ka frequency ranges, is provided.

System for dual frequency range mobile two-way satellite communications

Growing community of inventors

Sofia, Bulgaria

Ivan Tsonev Ivanov