Radio Occultation Science Experiment (ROSE)

Radio Occultation Science Experiment (ROSE)


  • Determine the vertical structure of plasma in the ionosphere
  • Identify the density, altitude, and width of the ionospheric density peak


Vertical profiles of the electron density in the ionosphere of Mars with an accuracy on the order of 1E9 m-3, a vertical resolution on the order of 1 km, and a vertical range on the order of 100–500 km.

Technical details and heritage

  • Radio occultation investigation
  • Two-way radio link
  • X-band frequency (8 GHz)
  • No data recorded onboard spacecraft
  • Uses Deep Space Network (DSN) ground stations
  • Ground element heritage from Cassini, Mars Global Surveyor, and others

Instrument publications

Additional Project Information

The ROSE investigation lead is Paul Withers (Boston University). For more about Withers, visit: