- Article
A Systematic Study of 7 MHz Greyline Propagation Using Amateur Radio Beacon Signals
- Sam Lo,
- Nikola Rankov,
- Cathryn Mitchell,
- Benjamin Axel Witvliet,
- Talini Pinto Jayawardena,
- Gary Bust,
- William Liles and
- Gwyn Griffiths
This paper investigates 7 MHz ionospheric radio wave propagation between pairs of distant countries that simultaneously lie on the terminator. This is known as greyline propagation. Observations of amateur radio beacon transmitters recorded in the We...

