Inspec keywords: ionospheric electromagnetic wave propagation; HF radio propagation; F-region; electromagnetic wave reflection; ionospheric techniques; radio direction-finding; plasma density; interplanetary magnetic fields; electron density; geomagnetic variations; measurement errors
Other keywords:
Subjects: F-region; Ionospheric electromagnetic wave propagation; Radionavigation and direction finding; Interplanetary magnetic fields; Geomagnetism and geoelectricity; Radiowave propagation; Atmospheric, ionospheric and magnetospheric techniques and equipment