ionospheric wave

8.5

A radio wave sent into the sky that bounces off the ionosphere back to Earth

noun

Specialized

: onda ionosférica

Radio operators rely on ionospheric waves to transmit signals over long distances.

Examples

The strength of an ionospheric wave can vary depending on solar activity.
Scientists study ionospheric waves to better understand atmospheric conditions.
An ionospheric wave can travel long distances.
The ionospheric waves bounced back to the ground.
Radio operators rely on ionospheric waves to transmit signals over long distances.
Scientists study ionospheric waves to better understand atmospheric conditions.
The strength of an ionospheric wave can vary depending on solar activity.

Synonyms

radio wave

vsionospheric wave

Specialized

19 3.2

A wave of invisible energy that sends signals to radios and phones

is the subset sent skyward and bounced back by the upper atmospheric layer

sky wave

vsionospheric wave

Specialized

7.8

A radio wave that bounces off the high air layer or a satellite back to the ground to travel far

is narrower, meaning signals reflected only by the upper atmospheric layer

Surface Forms

ionospheric wave singular

ionospheric waves plural

Morphology

ionospheric + wave

The compound is compositionally predictable: 'ionospheric' (pertaining to the ionosphere) modifies 'wave', so a learner who knows both constituents can infer it refers to a wave occurring in or associated with the ionosphere. Although the term is technical (often referring to radio waves reflected by the ionosphere), that domain-specific narrowing does not block compositional inference, so the expression is transparently built from its parts.

Etymology

Ionospheric wave comes from the image of a radio wave sent up that 'bounces' off the ionosphere, a high layer of charged air, like a ball hitting a roof and coming back down. That's why it means a radio signal sent into the sky and 'reflected' back to Earth.