GROUND WAVE AND DIFFRACTION - (A)

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Authors
  1. Whitteker, J.H.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN)
Abstract
The two lectures on ground wave and diffraction review the effect of the ground and of trees and buildings on the propagation of radio waves. The first lecture (A), concentrates on the physical models and basic mathematical methods used to describe ground-wave propagation and terrain diffraction. The discussion progresses from methods appropriate to smooth and uniform terrain, to those appropriate to irregular terrain sur-mounted with trees and buildings. At the same time, the radio frequencies of interest tend to progress from HF and below to higher frequencies. The second lecture (B) describes a range of tools, most but not all of them computer-based, that can be used to plan systems that are affected by these phenomena. These planning tools range from simple equations and graphs to computer programs that do intensive calculations based on detailed terrain data. They may be empirical or theoretical, or a mixture.
Report Number
AGARD-LS-196-PAP-2A — CONTAINED IN 95-04286
Date of publication
01 Sep 1994
Number of Pages
13
DSTKIM No
95-04277
CANDIS No
152576
Format(s):
Document Image stored on Optical Disk

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