F1-layer

From AMS Glossary
Jump to: navigation, search


F1-layer

The layer of the ionosphere that exists as an appendage on the lower part of the [[F2-layer]] during the day.

It exhibits a distinct maximum of free-electron density, except at high latitudes in winter, when it is not detectable. Its virtual height ranges from 200 to 300 km, being lowest at around noon. The F1-layer is formed by absorption of solar radiation in the extreme ultraviolet (EUV) range of wavelengths and is often roughly similar in shape to an idealized Chapman layer.

Personal tools
Namespaces
Variants