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Almat, Nil
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Almat, Nil
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GNSS-grade space atomic frequency standards: Current status and ongoing developments
2021, Batori, Etienne, Almat, Nil, Affolderbach, Christoph, Mileti, Gaetano
We present an overview on the current state of Global Navigation Satellite Systems (GNSS)-grade or better space atomic frequency standards’ (SAFS) technologies and discuss their applications. We estimate that a total of more than 1000 such standards were sent to space so far, the vast majority consisting of rubidium-cell frequency standards, Cs atomic beam frequency standards, and passive hydrogen masers. Finally, we review a variety of ongoing developments in view of future new generations of GNSS-grade SAFSs.