Comparison of Waveguide and Wave Hop Techniques for VLF Propagation Modeling
NAVAL WEAPONS CENTER CHINA LAKE CA CHINA LAKE United States
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Several mathematical models for describing VLF radio wave propagation in the earth-ionosphere waveguide have been presented in the literature. The Wave Hop model and the Waveguide mode model are investigated. The computerized versions of these propagation models are examined by comparing the computed electric field strengths obtained for each model when using the same input parameters. It is found that the two models as they now exist do not produce exactly the same computational results and the degree of difference between the two computations is dependent upon propagation frequency and the electron density profile used for the ionosphere.