Heaviside layer
Kennelly-Heaviside layer
E layer
E region

They are already in operation, sending their defensive waves against the Heaviside layer.

So we can turn it straight up and shoot that field into the Heaviside Layer.

The penetration of the Heaviside Layer was no great problem.

There is a reference to the Heaviside layer in the musical Cats.

Moyashka conjectured that the so-called Heaviside layer might be involved.

Radio would be line of sight, and the Ringworld atmosphere probably had a Heaviside layer.

Unfortunately Venus has a Heaviside layer, so we can't wireless.

It was almost a perfect sphere, mat did not change with the night and day, as did the Heaviside Layer.

A hundred miles above his head, tenuous and invisible, the Heaviside Layer would be expanding outward toward the stars as the sun went down.

In the end of the musical, Grizabella is chosen to go the Heaviside Layer.