Space Applications: GPS, Galileo, Glonnass, SATCOM Atomic Clocks are used in various space applications: examples are GNSS and SATCOM Satellites GNSS (navigation) systems such as GPS, Galileo and Glonass uses atomic clocks as the key component to provide the accurate timing needed for the navigation process. A communication satellite (sometimes referred to in short as ComSat) is a satellite stationed in space for the purposes of telecommunications. Modern communications satellites use geostationary orbits, Molniya orbits or low polar Earth orbits. A satellite communication system is built up from two main sub systems: the satellite and the satellite base stations. Atomic clocks on board and in the base station are essential for precise timing.   Israel Aircraft Industries MBT/Space Division and AccuBeat Company Ltd. have signed an Agreement for Developing of new Space Atomic Rubidium Clock AccuBeat and IAI/MBT Space Division are chosen by Europe to supply Atomic rubidium clocks for the Galileo Ground Station

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