D-layer


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  • noun

Synonyms for D-layer

the lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves

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References in periodicals archive ?
Studying the SID recorded over different paths also allows research into the characteristics of the D-layer and its response to the solar flare.
With the Sun absent at night, the D-layer vanishes; signal strength varies randomly and can often be quite high.