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Ground wave is a mode of radio propagation that consists of currents traveling through the earth. Ground waves propagate parallel to and adjacent to the surface of the Earth, and are capable of covering long distances by diffracting around the Earth's curvature.
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ground propagation waves frequencies radio groundwave wave signals skywave frequency earth range lower surface long medium conductivity distances higher low-frequency
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Ground wave | is a | mode of radio propagation that consists of currents traveling through the earth | 0.90 | text |
| LORAN | instance of | navigation systems | 0.80 | text |
| low-frequency time signals | instance of | navigation systems | 0.80 | text |
| non-directional beacons | instance of | navigation systems | 0.80 | text |
| and short-range HF communications all make use of it | instance of | navigation systems | 0.80 | text |
| sea water providing the best propagation | instance of | with highly conductive surfaces | 0.80 | text |
| and dry ground | instance of | with highly conductive surfaces | 0.80 | text |
| ice performing the worst.As the distance increases | instance of | with highly conductive surfaces | 0.80 | text |
| ground waves spread out according to the inverse-square law | instance of | with highly conductive surfaces | 0.80 | text |
| Ground wave | has application | Most | 0.60 | section |
| Ground wave | has application | Groundwave | 0.60 | section |
| Ground wave | has application | Uses | 0.60 | section |
These clusters group vocabulary that occurs around closely connected concepts in the source material.
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