F2 layer | Article about F2 layer by The Free Dictionary
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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
Miro Amarante, "Behavior of the scale height at the F2 layer
peak derived from Digisonde measurements at two European stations," Advances in Space Research, vol.
If the E layer is penetrated, one or more hops from the F layer can occur At night, this would be from the F2 layer
, and in the daytime.
The most important layer for use in HF communications is the F2 layer
. Long-distance radio communications as well as nighttime HF communications depend on this layer for both its height and its capability to reflect HF signals (Figure 2).