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Radiowave Propagation Information for Predictions for Earth-to-Space Path Communications

Handbook

image of Radiowave Propagation Information for Predictions for Earth-to-Space Path Communications

This Handbook provides information on radiowave propagation to assist in the design of Earth-to-space communication systems.

English

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Propagation effects of the troposphere and the ionosphere

ITU-R Study Group 3 deals with propagation effects in all regions of the atmosphere and free space, including the Earth's ionosphere. Most of the Earth's “weather” (precipitation) occurs in the troposphere, which is the non-ionized region from the surface up to a height of about 15 km (at the equator) above the surface. The thickness of the troposphere decreases towards the poles. Propagation effects in the troposphere tend to increase in importance as the frequency increases above 1 GHz. For mobile-satellite systems, the effects of reflection from the Earth's surface are critically important at even lower frequencies.

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