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