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Near Vertical Incidence Sky Wave NVIS Propagation

Background. Near Vertical Incidence Sky Wave (NVIS) propagation provides local and regional coverage on the lower HF bands.NVIS is not new.German army experimented with NVIS during WW IIUS military personnel used NVIS in Vietnam.Many amateurs have used NVIS on 80 and 160m without knowing it.. How NVIS works.

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Near Vertical Incidence Sky Wave NVIS Propagation

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