Ionospheric Disturbances 2017 eclipse - Hamvention

This is an updated version of a presentation uploaded previously. Subject is ionospheric disturbances noted daily at dawn and dusk and during the 2017 eclipse. The presentation includes subsequent analyses of the multiple frequency shifts noted on 5 MHz WWV at dawn. The analyses correlate the multiple frequency swings with the opening of multiple-hop modes at dawn as the critical frequency slews through 5 MHz. This paper was presented at the 2019 Dayton Hamvention.