Statements (18)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:region_of_ionosphere
|
| gptkbp:affects |
shortwave radio propagation
|
| gptkbp:alsoKnownAs |
gptkb:Appleton_layer
|
| gptkbp:composedOf |
gptkb:F2_layer
gptkb:F1_layer |
| gptkbp:contains |
highest concentration of free electrons in ionosphere
|
| gptkbp:discoveredIn |
1920s
|
| gptkbp:dividedInto |
F1 and F2 layers during daytime
|
| gptkbp:elevation |
150 km to 800 km above Earth's surface
|
| gptkbp:form |
single layer at night
|
| gptkbp:importantFor |
long-distance radio communication
|
| gptkbp:ionizationSource |
solar ultraviolet radiation
|
| gptkbp:locatedIn |
gptkb:ionosphere
|
| gptkbp:maximumElectronDensity |
gptkb:F2_layer
|
| gptkbp:namedAfter |
gptkb:Edward_Appleton
|
| gptkbp:bfsParent |
gptkb:Appleton_layer
|
| gptkbp:bfsLayer |
6
|
| http://www.w3.org/2000/01/rdf-schema#label |
F region of ionosphere
|