Safran Group's MiniRAFS (Mini Rubidium Atomic Frequency Source), a space-qualified atomic clock, is the best-in-class innovation of its kind which is designed to meet the rigorous demands of various space missions. The miniRAFS is engineered for operations in Low Earth Orbit (LEO), Medium Earth Orbit (MEO), and Geostationary Orbit (GEO), boasting a design life exceeding 20 years.

This compact atomic clock features a primary output frequency of 10 MHz with exceptional short-term frequency stability of 1 x 10^-11 over one second. Its phase noise ranges from -135 to -64 dBc/Hz, and it has a return loss greater than 20 dB. The miniRAFS maintains harmonic distortion below 30 dBc and spurious signals less than -80 dB. It operates with a DC supply of 15.5 to 16.5 volts and dissipates between 10 and 15 watts. With a mass of 0.45 kg and dimensions of 53 x 67.5 x 107.5 mm, it is well-suited for high-precision applications such as space scientific missions, secure satellite communications, tracking and guidance control, and advanced low satellite orbit digital communications.

This rubidium atomic frequency source delivers an output signal level of 7 dBm with a frequency accuracy of better than 2 x 10^-10. The miniRAFS features a phase noise of -135 dBc/Hz at a 100 kHz offset. It is a complete atomic clock within a compact volume and can be paired with an optional Electronic Power Conditioning (EPC) unit, which includes a DC/DC converter and an adaptable interface for specific satellite requirements.

The miniRAFS module integrates a voltage-controlled crystal oscillator (VCXO) locked to the stable atomic transition of the Rb87 isotope. The consistent innovation, high quality and reliability represents Safran Group’s commitment to advancing space technology and meeting the evolving needs of the aerospace industry.

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