E-region
alternative label: E-layer
narrower: sporadic-E layer
broader: ionosphere
preferred label: منطقه-ای. @fa
type: Concept

ionosphere
preferred label: یون‌سپهر @fa
type: Concept
narrower: E-region

sporadic-E layer
preferred label: لایه‌های پراکنده E @fa
type: Concept
broader: E-region