Rubidium Atomic Frequency Standards

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Category: RAFS

Description

Tab 1

MODEL	DESCRIPTION	APPLICATION
DRAFS	GPS III Space Vehicle 10 (SV10) has the FEI Digital Rubidium Atomic Frequency Standard (DRAFS) clock on board. One of FEI DRAFS engineering development units (EDU) is included in SV10s experimental/future clock slots for evaluation after completion of qualification testing of our qual unit. FEI’s DRAFS provides excellent frequency stability designed for the space environment.	GPS IIIF
MODEL	DESCRIPTION	APPLICATION
Turbo	The Timing Unit Rubidium Oscillator (TURBO) includes timing requirements that cannot be met with quartz oscillator technology alone. Fractional frequency stability and accuracy requirements better than 3 x 10-12 s/s for 100s averaging times as well as time holdover requirements better than ±10μs over 1 day require the use of an atomic clock. All stability and accuracy requirements in addition to phase noise requirements must also be met when the unit is subjected to airborne operational vibration levels.	US DoD
MODEL	DESCRIPTION	APPLICATION
VHP	VERY HIGH PERFORMING (VHP) Rubidium Oscillator with very low drift, very low phase noise, and excellent short-term, long-term and temperature frequency stability.	US DoD