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BOOKERS THEORY OF SCATTERING FROM
THEORY OF OVERHEAD SPORADIC E
Sporadic Echoes of the Blanketing Type
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angle of incidence backscattered echoes Baker Lake Chapter components corresponds cut-off frequency diffuse echoes dip versus diurnal diurnal and seasonal earth's magnetic field echoes arriving electron density F ionograms F layer F region frequency f frequency spreading geographic latitude Godhavn group retardation h'f curve Huancayo illustrated inner edge ionization ionization density ionogram marked ionogram of Figure ionograms photographed Ionospheric Station level of reflection magnetic dip magnetic equator magnetic latitudes maximum Mc/s minimum virtual height NARSARSSUAK Nite Fl nonblanketing type normal trace o o o o o o observed ionogram observed spread occur operating frequency outer frequency edge overhead Panama Canal path quency scale scattered echoes scattering screen seasonal variations shown in Figure slant sounder specular reflections sporadic F spread echoes spread F type spread ionograms study of spread sunspot activity T1ME type of spread type spread values virtual heights associated