E layer

noun

1. the radio-reflective ionospheric layer of maximum electron density, normally found at an altitude between 60 and 75 miles (100 and 120 km).

E layer

noun

1. another name for E region

E layer

1. See E region

Word History and Origins

Origin of E layer¹

First recorded in 1930–35

Example Sentences

The team’s radar detectors were designed to measure the waves bouncing off the ionosphere’s E layer, a region 100 kilometers up.

From Science Magazine

The lowest layer where this can happen is known as the E layer, which is 60 to 70 miles up into our atmosphere.

From Salon