| 11. | As the wavefront of the ground wave travels along the Earth's surface it is attenuated.
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| 12. | Ground waves " do not " include tropospheric waves.
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| 13. | Creeping waves greatly extend the ground wave propagation of long wavelength ( low frequency ) radio.
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| 14. | That is because digital ground wave broadcasting might move forward very rapidly in the United States.
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| 15. | Distance between the Relay Nodes were approximately 150 200 miles, determined by the ground wave transmission wavelength.
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| 16. | Ground wave propagation, the most widely used type at these frequencies, requires vertically polarized antennas like monopoles.
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| 17. | Wet and moist sandy soils enhance the ground wave propagation, whereas dry and rocky grounds reduce signal strengths.
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| 18. | Ground wave radio signal propagation is ideal for relatively short distance propagation on these frequencies during the daytime.
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| 19. | Ground waves propagate in vertical polarization, with their magnetic field horizontal and electric field ( close to ) vertical.
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| 20. | In case of just ground wave reception a constant is included in the calculation if the distance is permanent.
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