E-Skip

Related wiki pages : Propagation, Meteor scatter, Aurora, Tropspheric ducting

What is it?
The E-layer is the lowest layer of the atmosphere and can typically be found at altitudes between about 80km and 100km. the E-Layer is characterised by high electron densities, and high temperatures (between 300K and 122K)

E-Skip propogation is the refelection of radio waves off the E-Layer, allowing reception many thousands of kilometres distant from normal reception areas.

At which frequencies does E-Skip occur?
E-Skip generally occurs at night in the medium and shortwave HF parts of the spectrum.

What is Sporadic E-Skip?
Sporadic E-skip is associated with scattered regions of especially dense ionisation that occur seasonall within the E-layer. generally it occurs:


 * daily during the day in equatorial regions
 * commonly in temperate regions in late spring, early summer and sometimes in early winter
 * in association with auroras in Polar regions
 * at frequencies up to about 150MHz
 * can provide communication over distances up to 2,400Km