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Inspec keywords: ionospheric electromagnetic wave propagation; approximation theory; modems; Doppler effect; electron density; digital radio; inhomogeneous media; electromagnetic wave scattering; anisotropic media; HF radio propagation; delays
Subjects: Interpolation and function approximation (numerical analysis); Numerical approximation and analysis; Electromagnetic waves: theory; Radio links and equipment; Ionospheric electromagnetic wave propagation; Radiowave propagation