E-Skip

Related wiki pages : Propagation, Meteor scatter, Aurora, Tropospheric 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 seasonally 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

Propagation and radio wave theory
Propagation	Aurora * E-Skip * IPS * Lightning scatter * Meteor scatter * Satellites * Trans-Equatorial Propagation * Tropospheric ducting
Interference	QRM * QRN
Theory	Electromagnetic Waves * Frequency Wavelength and Period