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Ionospheric propagation

Ionospheric propagation

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The ionosphere, which extends from ~60 km to ~1000 km, significantly affects the propagation of high-frequency (HF) to ultrahigh-frequency (UHF) signals which pass through it. The effects are varied but include refraction, retardation and scintillation. Ground-ground HF communications systems, ground-space communications systems, single frequency GPS (global positioning system), HF over-the-horizon radars, satellite altimeters and space-based radars are examples of radio systems constrained by this medium. Topics of interest include ionospheric morphology; ray tracing; MUF, multipath and other HF issues; fading and Doppler effects; and modem requirements on SNR, Doppler and multipath.

Inspec keywords: HF radio propagation; Doppler effect; ray tracing; modems; ionospheric electromagnetic wave propagation

Other keywords: refraction; radio systems; modem; space-based radars; SNR; scintillation; satellite altimeters; ionospheric propagation; fading effects; retardation; HF over-the-horizon radars; ground-ground HF communications systems; multipath propagation; Doppler effect; single frequency GPS; ray tracing; ground-space communications systems; ionospheric morphology; maximum usable frequency

Subjects: Ionospheric electromagnetic wave propagation; Radiowave propagation

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