ground wave

A ground wave radio signal is made up from a number of constituents.

Then the ground wave hit like a minor earthquake.

It is the sum of all these components that is known as the ground wave.

MW broadcasting stations use ground waves to cover their listening areas.

Ground wave and sound reached the bunker at the same moment, almost a full minute after the first searing flash.

The type of antenna and its polarisation has a major effect on ground wave propagation.

As the wavefront of the ground wave travels along the Earth's surface it is attenuated.

Ground waves follow the curvature of the Earth.

Low frequency ground waves can be received up to 2000 km from the transmitting antenna.

The nulls in the pattern are caused by interference of the ground wave and the sky (reflected).

Lower frequencies, below 3 MHz, travel efficiently as ground waves.

Only part of the television signal, called the ground wave, radiates horizontally from the station antenna.

Any sonic or ground wave that hits one side of the sheath is re-radiated on the other.

They solved it by using ground waves.

Ground waves differ from air waves in that they can travel only through the ground.

Ages later, the balcony on which the Master stood shuddered beneath the impact of the ground wave racing through the rocks below.

Normally radio "ground waves" propagate along the surface as creeping waves.

Since the ground is not a perfect electrical conductor, ground waves are attenuated as they follow the earth's surface.

For the real Earth's surface, the ground wave becomes dissipated and depends of the orography along the ray path.

Ground waves is a mode of propagation.

It is for this reason that surface wave is commonly called ground wave propagation.

The antenna system was designed to produce a ground wave intended to prevent interference with distant transmitters on the same frequency.

Ground waves do not include ionospheric and tropospheric waves.

AM contours are based on the standard ground wave field strength pattern, the frequency, and the ground conductivity in the area.

Distance between the relay nodes were determined by the ground wave transmission wavelength, at intervals of approximately 150-200 miles.