Rubidium Atomic Frequency Standard (RAFS)

Rubidium Atomic Frequency Standard (RAFS)

  • Rb Atomic Frequency Standard

RAFS Oscillator Overview

The RAFS is a cost-effective, ultra-high-performance, space-qualified rubidium frequency standard.

It's designed with the latest technologies, providing advanced features, such as long lifetime, high reliability, lightweight and ultra low phase noise, for next-generation space applications.

RAFS Features & Applications

Key Features

Specifications Standard Options
Output
Input
10 MHz and 10 MHz auxiliary
n/a


Accuracy < 2E-10 after launch & commissioning
< 1E-10 under vacuum at delivery
Tempco
Temp
Aging
n/a
-5 to 10C
< 1E-10/yr


Stability (ADEV)
1s
10s
100s
1 ks
10 ks (drift removed)
Flicker floor (drift removed)
Max          Typical 
5E-12       3E-12 
1.3E-12    1E-12
5E-12       3E-13
1.8E-13    6E-14
5E-14       3E-14
5E-14       1E-14


Phase noise @ 10 MHz
1 Hz
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
(dBc/Hz)
-90
-120
-130
-140
-145
-145
 
Holdover n/a
Warm-up time n/a
Power (operating)
Voltage
Warm-up
< 35W
28V
< 60W

50V

Size (WxHxL) 217x124x117mm | 8.54x4.88x4.6"
Weight 3.4 Kg | 7.49 lbs
Vibration Sensistivity See spec
Lifetime/MTBF > 15 yrs / < 2000 fit span>

Applications

It is typically used in the following applications:

  • GNSS/GPS navigational systems
  • SAR systems
  • FGU systems
  • MRO systems

Resources

Datasheets

More Info
Rubidium Atomic Frequency Standard (RAFS)
pdf - 2 MB
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Technical Notes and Briefs

More Info
Accurate and ultra-stable atomic clocks have been recognized as the critical equipment for the precision Global Navigation Satellite Systems (GNSS). SpectraTime (SpT) and T4Science (T4S) are space and ground clocks manufacturers of Rubidium Atomic Frequency Standard (RAFS) and Active & Passive Hydrogen Maser (HM) for various navigation systems (European, Chinese and Indian) and other programs.
pdf - 689 KB
 [ Permalink ]
pdf - 753 KB
Saturday, February 1, 2014
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More Info
Galileo program is approved by the European Commission and the European Space Agency (ESA). The activities related to GSTBV2 experimental satellite as well as the implementation of the In Orbit Validation phase are in progress. Atomic clocks represent critical equipment for the satellite navigation system and clocks development has been continuously supported by ESA.
pdf - 571 KB
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All RAFS Documents & Files

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