Sporadic E
Sporadic E propagation
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Sporadic E notes with reference to ten meters FM by g4xgt -
Automatic 144MHz E-skip Alerts for North America -
Sound clips and notes on sporadic E on four meter band -
Amateur radio propagation studies (science, research, engineering, operating) and the BeamFinder propagation analysis software -
Two modes of propagation at 50MHz E-layer & Sporadic-E by Ken G4IGO -
2 Meter Es spots detected by the DXrobot -
Automatic 144MHz E-skip Warnings via Email for European Region -
About Sporadic E propagation at wikipedia -
Sporadic-E clouds location and estimated MUF real time map -
Understanding 10 Meter sporatic-e propagation by James R. Duffey -
In order to understand, however imperfectly, when the band will open, it is essential to have some understanding of why the band will open. Article by J. R. Kennedy K6MIO/KH6, Gemini Observatory Hilo, Hawaii -
The map display allows you to select by locator, or clicking on the map, where you want to calculate the probability of Sporadic-E by building a combination EPI, Es Probability Index, based on factors using many of the known parameters which can effect Es. T -
Thunderstorm effects on sporadic E propagation, Very long distance propagation in the 144 MHz band, Analysing the number of skips in multiple hop propagation -
Sporadic E is a form of propagation that can arise with little warning, and enable radio frequencies of 150 MHz and more to travel over distances of a thousand kilometres and more. -
Sporadic-E clouds location and estimated MUF real time map by DXMAPS -
This review of progress and future Prospects provides a practical guide for effective use of VHF sporadic-E propagation. -
Recent researches seem to support the hypothesis that Sporadic E propagation could be connected to presence of thunderstorms. -
A Case For Thunderstorms Causing Sporadic E on 6 Meters. In Propagation and Radio Science, Eric Nichols explains one possible mechanism is thunderstorms that are strong enough to break electrons free forming a cloud of free electrons.