Team title: Heliospheric Radio Diagnostics of the Background Solar Wind Join The Team

Team ID: H1-02

Team Leads:         

Richard Fallows (ASTRON - Netherlands institute for Radio Astronomy, Netherlands),

Oyuki Chang (Ratherfort Appleton Laboratory, UK),

Keywords (impact): 

Keywords (activity type): Understanding,  Data Utilization


Interplanetary scintillation (IPS) - the scintillation of a compact radio source due to density structure in the solar wind and CMEs - is one of the primary methods of remote observation of the solar wind and CMEs throughout the inner heliosphere. Many observations taken daily can be used to build a tomographic reconstruction of solar wind density and velocity for possible use in better constraining space weather model outputs. Single observations, taken over longer durations, can also be used to build up profiles of solar wind velocity and density structure passing across the line of sight. The sensitivity of the technique to small-scale structure is also useful in studies of turbulence.


  • Promote the incorporation of IPS solar wind data in space weather modelling, both as a useful complement and potential backup to spacecraft observations
  • Investigate the benefits and pitfalls, and how to avoid them, of the use of IPS in this effort
  • Investigate the evolution of solar wind structure, including co-rotating structures, stream interactions, and CMEs through the inner heliosphere

Action topics:

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  • Observations of the outer corona/inner heliosphere for characterizing heliospheric structures and sub-structures over all scales (micro/meso/large),
  • Understanding of the turbulence evolution throughout the heliosphere,
  • Forecasting the arrival and impact of HSSs/SIRs/CIRs at/near Earth and prospects for other locations in the heliosphere (linked to H4)

Clusters with overlapping topics: 

  • H1: Heliospheric magnetic field and solar wind,
  • H2: CME structure, evolution and propagation through heliosphere

Link to team external website: