Via the ARRL: Air Force Research Laboratory Tracks Sporadic E

Researchers at the Air Force Research Laboratory (AFRL) in New Mexico have discovered a new way to track and characterize sporadic E, which occurs when large structures of dense plasma form naturally in the upper atmosphere. These plasma structures, which occur at mid-latitude locations around the world, can affect radio wave propagation in both positive and negative ways. VHF enthusiasts frequ…

Read more – via American Radio Relay League | Ham Radio Association and Resources http://www.arrl.org/news/view/air-force-research-laboratory-tracks-sporadic-e