Does anyone know of a source for a 32-bit Windows program to calculate MW broadcast groundwave field strength when frequency, power, radiator "efficiency," and ground conductivity are known? Hopefully one where conductivities could have several values along the length of a radial. Plotting the resulting azimuth pattern across a collection of radials would be useful, as well. Results should meet ITU and FCC standards. Even an Excel spreadsheet approach might be OK.
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