Inspec keywords: delays; direction-of-arrival estimation; HF radio propagation; Doppler shift; ionospheric disturbances; ionospheric electromagnetic wave propagation

Other keywords: reflection points; ionospherically propagated HF radio channel sounding signals; directional characteristics; pulsed channel sounding signal; time delay component; Doppler shifts; Doppler component; transauroral path; scattering; disturbances; high latitude paths; polar cap path; ionospheric irregularities

Subjects: Radiowave propagation