Overview of Radio Plasma Imaging (RPI)

• RPI transmits and receives coded electromagnetic echoes at 3 kHz to 3 MHz

• RPI uses a tri-axial orthogonal antenna system

  • 500 meter tip-to-tip x and y axis dipole antennas
  • 20 meters tip-to-tip z axis dipole antenna
  • Transmitter can utilize either x or y or both x and y axis antennas
  • Echo reception on all three axes

• Basic RPI measurements of an echo at a selected frequency

  • Amplitude
  • Time delay (distance or range from target)
  • Direction
  • Wave polarization (ordinary or extra-ordinary)
  • Doppler shift and frequency dispersion