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effects. An obstruction may lie to the side, above, or below the path. Ridges, bridges, cliffs, buildings, and trees are examples of obstructions. If the clearance from the nearest anticipated path position, over the expected range of Earth radius
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is a man-made or natural physical feature that lies near enough to a
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radius, the feature is not normally considered an obstruction.
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28:path to cause a measurable effect on
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63: This article incorporates
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76:General Services Administration
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22:propagation path obstruction
103:Radio frequency propagation
44:, exceeds 0.6 of the first
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71:Federal Standard 1037C
65:public domain material
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78:. Archived from
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82:on 2022-01-22.
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80:the original
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86:MIL-STD-188
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34:reflection
30:path loss
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