On Wednesday (08/24/2022 at 08:20PM +0000), Bill Davis via NLRS wrote: > https://phys.org/news/2023-08-nasa-wallops-demon-science-instruments.html "Sporadic-E layers on Earth can cause unpredictable disruptions to radio communications." Disruptions!!?? What Negative Nelly's ... -- Chris Elmquist NØJCF