HF Doppler Sounding Experiment in Japan - HFDOPE

Since 2003, HF Doppler sounding experiment has been operative in Japan for the study of atmosphere, ionosphere and magnetosphere. Currently, 1 transmitting station and 5 receiving stations are operative in Japan by a collaborative effort of four difference universities.

The scientific targets of the experiment are as follows:

  1. Ionospheric dynamics
    • Sporadic E-layer (Es)
    • Medium-scale traveling ionospheric disturbances (MSTIDs)
    • Large-scale traveling ionospheric disturbances (LSTIDs)
  2. Magnetosphere-Ionosphere coupling (M-I coupling)
    • Global-scale electric field variation
    • Sudden Commencement (SC)
    • Magnetic pulsation (Pc3 - Pc5)
  3. Vertical coupling in the Atmosphere-Ionosphere system (Vertical coupling)
    • Ionospheric variation after large earthquakes
    • Ionospheric variation after volcanic eruptions, typhoon