| 1. | Q : When do you think ground wave broadcasting will turn digital?
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| 2. | AM broadcasting stations use ground waves to cover their listening areas.
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| 3. | Normally radio " ground waves " propagate along the surface as creeping waves.
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| 4. | Ground waves, tropospheric scatter and skywaves can all achieve greater ranges than line-of-sight propagation.
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| 5. | They saw a small figure on the ground waving frantically.
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| 6. | It is for this reason that surface wave is commonly called ground wave propagation.
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| 7. | New England quakes create several ground waves per second.
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| 8. | It is the sum of all these components that is known as the ground wave.
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| 9. | The type of antenna and its polarization has a major effect on ground wave propagation.
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| 10. | But not all the signal travels by ground wave.
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