Grey line propagation provides surprisingly long distance radio communications at dawn and dusk - sometimes when other forms of ionospheric...
Hi all, This is a project that I've been working on for around 8 months, and it's been publicly available for most of that time, but I've finally...
Whole article is here: https://arstechnica.com/science/2018/03/spacex-launch-last-year-punched-huge-temporary-hole-in-the-ionosphere/ In...
Anyone wanting to use the HF bands will need to know something about ionospheric propagation. Some days the bands are good and other days they may...
HF propagation is notoriously variable as the state of the ionosphere changes. As the ionosphere is created chiefly by radiation from the Sun, the...
