74:, respectively. A skip zone is an annular region between the farthest points at which the ground wave can be received and the nearest point at which the refracted sky waves can be received. Within this region, no signal can be received because, due to the conditions of the local ionosphere, the relevant sky waves are not reflected but penetrate the ionosphere.
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A method of decreasing the skip zone is by decreasing the frequency of the radio waves. Decreasing the frequency is akin to increasing the ionospheric width. A point is eventually reached when decreasing the frequency results in a zero distance skip zone. In other words, a frequency exists for which
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that cannot be influenced by technical means. Its width depends on the height and shape of the ionosphere and, particularly, on the local ionospheric maximum electron density characterized by critical frequency
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vertically incident radio waves will always be refracted back to the Earth. This frequency is equivalent to the ionospheric plasma frequency and is also known as the ionospheric critical frequency, or f
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waves and higher normally travel through the ionosphere wherefore communication via skywave is exceptional. A highly ionized Es-Layer that occasionally may appear in summer may produce such
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If the radio wave frequency is decreased, a point is reached where all waves (even vertically incident waves) are reflected back to the Earth.
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19:"Zone of silence" redirects here. For the purported anomaly area in Mexico, see
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Skip zone is the subject of a film 'SKIPZONE' made in 1992 by UK artist,
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which travel both parallel to the ground, and towards the
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30:Formation of a skip-zone using Proplab-Pro 3.
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210: This article incorporates
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104:Sporadic E propagation
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100:Very high frequency
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21:MapimĂ Silent Zone
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