Keywords: IonosphereLayers-NPS.gif en Ionospheric layers At night the E layer and F layer are present During the day a D layer forms and the E and F layers become much stronger Often during the day the F layer will differentiate into F1 and F2 layers http //www weather nps navy mil/~psguest/EMEO_online/module3/module_3_2 html Naval Postgraduate School 2003-10-22 http //www nps navy mil/NPS/Disclaimers htm Ionosphere Layers es svg Other versions/Ionosphere Layers Ionosphere Layers en svg PD-USGov Ionosphere |