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- Definição1
- The portion of an electromagnetic signal that radiates upward from the antenna until it strikes the ionosphere, then bounces back to the earth.
- Fonte1
- CRANE, Dale (ed.). Dictionary of aeronautical terms. 4th ed. Newcastle: ASA, 2006.
- Definição2
- That portion of a radiated wave that travels in space and is returned to Earth by refraction in ionosphere (ASCC). Several other authorities use word ‘reflection’. Also called ionospheric or indirect.
- Fonte2
- GUNSTON, Bill. The Cambridge aerospace dictionary. Cambridge: Cambridge University, 2004. vii, 740 p. (Cambridge aerospace series.)
- Fonte3
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Annex 10 to the Convention on International Civil Aviation. Aeronautical Telecommunications. Volume I: radio navigation aids. 6th ed. Montreal, 2006.
- Contexto
- A further factor which limits the effective coverage of an NDB is present at night when interaction occurs between components of the signal which are propagated respectively in the horizontal plane (ground wave propagation) and by reflection from the ionosphere (sky wave propagation). When there is interaction between these components, which arrive at the ADF receiver with a difference of phase, bearing errors are introduced (night effect).
- Subárea1
- Aeronautical Telecommunications
- Português
- onda espacial