F2 layer


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Related to F2 layer: F1 layer

F2 layer

The upper layer of the ionosphere, it lies between 110 to 210 miles (180–350 km). The F2 layer is more persistent than the F1 layer. Its height varies in summers and winters as well as during the days and nights. It affects daytime propagation and reflects waves from about 3 to above 30 MHz. Also called the Appleton Layer. See F layer.
References in periodicals archive ?
5, it is apparent that the electron density increases with height until it reaches its maximum in the altitude range of 200 km - 300 km where the peak electron density of the F2 layer takes place.
At the height of 250 km, which includes the F2 layer, the electron density behavior is more complex.
Moreover, the position of the sun plays an important role in increasing the level of ionization during the summer season in the D and E layers and an anomaly that occurs in the F layer in particular the F2 layer.
For example, F2ESF2 represents an F2 reflection, followed by a reflection off the top of a transient layer of sporadic E, followed by another reflection off the F2 layer.