| Concept definition: |
A daytime <REGION> of the <IONOSPHERE>, above the <IONOSPHERIC_E_REGION>, characterized by weak concentrations of O2+ ions and located roughly between the <<ALTITUDE_MSL>>s of 200 and 1 500 kilometres; ionospheric F2-region. An ionospheric F2-region is also known as an ionospheric F2-layer. |
