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AO 91



The AO 91 (RadFxSat (Radiation Effects Satellite) or Fox 1B) is a joint mission by AMSAT and the Institute for Space and Defense Electronics at Vanderbilt University. It hosts a technology experiment by Vanderbilt University and an amateur communications payload by AMSAT.

RadFxSat is an 1U CubeSat designed to operate in Low Earth Orbit built based on the design of Fox 1A. It carries a 2 meter whip antenna and a 70 cm whip antenna.

The Vanderbilt payload is to advance the state of the art in understanding the effects of space radiation on electronic components, demonstrate an on-orbit platform for radiation qualification of components for space flight and to validate and improve computer models used to predict radiation tolerance of semiconductor manufacturing processes.

Alternate Names

  • AO91
  • RadFxSat (Radiation Effects Satellite)
  • 43017
  • Fox 1B

Facts in Brief

Launch Date: 2017-11-18
Launch Vehicle: Delta II 7920
Launch Site: Vandenberg AFB, United States
Mass: 1 kg

Funding Agency

  • Unknown (United States)


  • Communications
  • Technology Applications

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

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