The vertical polarization is obtained by ground waves
up to 45[degrees] elevation angle while the horizontal polarization is obtained by NVIS propagation between 70[degrees] and 90[degrees] elevation angle.
Army's Ground Wave
Emergency Network is a series of transmission towers spread across the country.
Quite why fans in a Scottish game in a Scottish ground wave
the Red Hand of Ulster or the Irish Tricolour, beats me.
Air Force ground wave
emergency network into an integrated, nationwide network to improve the accuracy of the GPS signal.
com) is a leading multi-system operator in Korea, offering cable TV as well as ground wave
and satellite TV broadcasting channels.
HF propagation can be line of sight, ground wave
, or sky wave.