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Short Distance Ground Wave Propagation Modeling In Irregular And Forested Environments, Zachary Michael Crane
Short Distance Ground Wave Propagation Modeling In Irregular And Forested Environments, Zachary Michael Crane
Masters Theses
A model for the phase of a ground wave propagating over irregular and forested terrain has been developed and tested for a transmission system operating at 3.315 MHz.
In this model, the time delay induced beyond that of the standard velocity of radio waves in air is modeled as a combination of 3 effects: the finite conductivity of the earth, the irregularity of the terrain over which the wave is propagating, and the forestation of the terrain.
The finite conductivity model is based on a small curvature formula developed by Van Der Pol and Bremmer. The terrain irregularity model models …