NVIS–Emergency Communications, Not Television Series

30Nov11

  Near Vertical Incidence Skywave (NVIS) is a propagation mode which uses high angle radiation to send signals almost straight up to be reflected back to Earth for   very effective short to medium distance communications. This mode of operation makes it ideal for in-state communications during disasters or other emergency situations. The military has used NVIS techniques for decades to provide short haul communication with other units on the ground.

To continue reading this article, please follow this link:  http://www.dxengineering.com/pdf/NVIS-Rev2.pdf

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