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Search references for GROUND WAVE. Phrases containing GROUND WAVE
See searches and references containing GROUND WAVE!GROUND WAVE
Radio wave propagating along the Earth's surface
Ground wave is a mode of radio propagation that consists of currents traveling through the earth. Ground waves propagate parallel to and adjacent to the
Ground_wave
Behaviour of travelling radio waves
radio waves can travel as surface waves following the contour of the Earth; this is called ground wave propagation. In this mode the radio wave propagates
Radio_propagation
Physical phenomenon
transmission, a ground wave is a guided wave that propagates close to the surface of the Earth. In seismology, several types of surface waves are encountered
Surface_wave
Type of electromagnetic radiation
obstacles like mountains and follow the contour of the Earth (ground waves), shorter waves can reflect off the ionosphere and return to Earth beyond the
Radio_wave
Class of radio antenna
radiator, and ground plane antennas. The monopole is usually used as a resonant antenna; the rod functions as an open resonator for radio waves, oscillating
Monopole_antenna
Radio transmission using wavelengths above 1000 m
propagation, called ground wave, is the main mode in the longwave band. The attenuation of signal strength with distance by absorption in the ground is lower than
Longwave
U.S. government command and control communications system
The Ground Wave Emergency Network (GWEN) was a US Air Force command and control communications system, deployed briefly between 1992 and 1994, intended
AN/URC-117 Ground Wave Emergency Network
AN/URC-117_Ground_Wave_Emergency_Network
Type of radio frequency antenna
stations cover their listening area using ground waves, vertically polarized radio waves which travel close to the ground surface, following the contour of the
Mast_radiator
Dynamic disturbance in a medium or field
traveling wave; by contrast, a pair of identical superimposed periodic waves traveling in opposite directions makes a standing wave. In a standing wave, the
Wave
(mS/m). Ground conductivity is an extremely important factor in determining the field strength and propagation of surface wave (ground wave) radio transmissions
Ground_conductivity
30–300 kHz range of the electromagnetic spectrum
in this band is ground waves, in which LF radio waves travel just above the Earth's surface, following the terrain. LF ground waves can travel over hills
Low_frequency
Propagation of radio waves beyond the radio horizon
wishes to avoid interference between the ground wave and sky wave, anti-fading antennas are used to suppress the waves being propagated at the higher angles
Skywave
Long distance radar technology
less-expensive ground-based radars are once again being considered for roles such as maritime reconnaissance and drug enforcement. The frequency of radio waves used
Over-the-horizon_radar
Type of electromagnetic diffraction
the surface of a smooth body such as a sphere. Creeping waves greatly extend the ground wave propagation of long wavelength (low frequency) radio. They
Creeping_wave
3–30 MHz range of the electromagnetic spectrum
band ground wave transmission distances are limited to 10-20 miles. Short range communication can occur by a combination of line-of-sight (LOC), ground bounce
High_frequency
Device that transmits and receives radio waves
into radio waves for transmission, and to convert radio waves back into electric currents for reception. It is the interface between radio waves propagating
Antenna_(radio)
300–3000 kHz range of the electromagnetic spectrum
control. Radio waves at MF wavelengths propagate via ground waves and reflection from the ionosphere (called skywaves). Ground waves travel just above
Medium_frequency
waveguide is the phenomenon in which certain radio waves can propagate in the space between the ground and the boundary of the ionosphere. Because the ionosphere
Earth–ionosphere_waveguide
Electromagnetic radiation with wavelengths from 1 m to 1 mm
line-of-sight; unlike lower frequency radio waves, they do not diffract around hills, nor follow the Earth's surface as ground waves, nor reflect from the ionosphere
Microwave
Horizontal layer that propagates electromagnetic radiation
be limited to line of sight. Normally radio "ground waves" propagate along the surface as creeping waves. That is, they are only diffracted around the
Atmospheric_duct
Type of radio wave
change in the dielectric constant, or its gradient. In some cases, a ground wave may be so altered that new components appear to arise from reflection
Tropospheric_wave
Woodblock print by Hokusai (1831)
The Great Wave off Kanagawa (Japanese: 神奈川沖浪裏, Hepburn: Kanagawa-oki Nami Ura; lit. 'Under the Wave off Kanagawa') is a woodblock print by the Japanese
The_Great_Wave_off_Kanagawa
Aspect of relativity in physics
Gravitational waves are waves of spacetime curvature that propagate at the speed of light and are produced by the relative motion of gravitating masses
Gravitational_wave
Coffee movement emphasizing quality
[citation needed] The first and second waves of coffee were characterized by at-home consumption. The first wave was pre-ground, vacuum-packed, mass-market cans
Third-wave_coffee
Origin point beneath an air explosion
A hypocenter or hypocentre, also called ground zero or surface zero, is the point on the Earth's surface directly below a nuclear explosion, meteor air
Hypocenter
Lowest energy level of a quantum system
of the ground state wave function and that is in contradiction to the premise that this wave function cannot have a node. Note that the ground state could
Ground_state
Type of surface acoustic wave which travels along the surface of solids
waves (called "ground roll") are the most important type of surface wave, and can be produced (apart from earthquakes), for example, by ocean waves,
Rayleigh_wave
Characteristic of electromagnetic radiation
frequency (below approximately 3 MHz) due to diffraction, radio waves can travel as ground waves, which follow the contour of the Earth. This enables AM radio
Line-of-sight_propagation
Area where radio transmissions can not be received
there are radio waves which travel both parallel to the ground, and towards the ionosphere, referred to as a ground wave and sky wave, respectively. A
Skip_zone
Series of water waves
(t)soo-NAH-mee, (t)suu-; from Japanese: 津波, lit. 'harbour wave', pronounced [tsɯnami]) is a series of waves in a water body caused by the displacement of a large
Tsunami
Method of detecting gravitational waves
Ground-based interferometric gravitational-wave search refers to the use of extremely large interferometers built on the ground to passively detect (or
Ground-based interferometric gravitational-wave search
Ground-based_interferometric_gravitational-wave_search
Antenna consisting of two rod-shaped conductors
elevation angles where the ground reflection combines with the direct wave approximately in phase. The earth acts as a ground plane, but it can be a poor
Dipole_antenna
Shock wave from flying at the speed of sound
characteristic U-wave shape. Since the boom is being generated continually as long as the aircraft is supersonic, it fills out a narrow path on the ground following
Sonic_boom
Multisite radar
(multiple bistatic pairs) Xidian University’s Coast-ship Bi/multistatic Ground-wave Over-the-horizon Radar (multiple transmitters, single receiver) Passive
Multistatic_radar
Physical model of propagating energy
electromagnetic radiation (EMR) or an electromagnetic wave (EMW) is a self-propagating wave of the electromagnetic field that carries momentum and radiant
Electromagnetic_radiation
Mediumwave broadcasting region
In mediumwave broadcasting, a mush area is a region where the ground wave and sky wave from a transmitter are received at approximately equal signal strength
Mush_area
Synchronized action by a stadium audience
The wave (also Mexican wave outside North America) is a type of metachronal rhythm achieved in a packed stadium or other large seated venue, when successive
Wave_(audience)
Broadband electromagnetic impulse
voltage), only standing resonant waves modes can exit. The fundamental mode which transports electric charge to the ground most effectively, has thus a wavelength
Radio_atmospheric_signal
Antenna constructions for different applications
any power lost in the ground plane. Quarter-wave monopole A quarter-wave vertical is the most common monopole; it is a 1/ 4 wave tall vertical radiator;
Antenna_types
30–300 GHz range of the electromagnetic spectrum
Millimeter waves propagate solely by line-of-sight paths. They are not refracted by the ionosphere nor do they travel along the Earth as ground waves as lower
Extremely_high_frequency
broadcast antennas use either line-of-sight or ground wave propagation (a slight refraction towards the ground) to reach their nearby listeners, and thus
Vertical and horizontal (radio propagation)
Vertical_and_horizontal_(radio_propagation)
Vibrational energy transfer in Earth or other planetary body
faster-moving P waves and displace the ground perpendicular to the direction of propagation. Depending on the propagational direction, the wave can take on
Seismic_wave
US strategic communications system
future. Boeing E-4 Survivable Low Frequency Communications System (SLFCS) Ground Wave Emergency Network (GWEN) Minimum Essential Emergency Communications Network
TACAMO
Topics referred to by the same term
California Tropical Storm Gwen, several storms with the name AN/URC-117 Ground Wave Emergency Network, a military command and control communications system
Gwen
British physicist (1892–1965)
ground wave and the reflected wave, meaning they travel different distances from sender to receiver. Let the distance AC travelled by the ground wave
Edward_Victor_Appleton
Canadian electrical engineer and physicist (1924–1998)
Electromagnetic wave transmission within the earth 1976 Attenuation on a surface wave G-line suspended within a circular tunnel 1979 Ground wave theory via
James_R._Wait
Series of waves generated by distant weather systems
also sometimes referred to as ground swell, in the context of an ocean, sea or lake, is a series of mechanical waves that propagate along the interface
Swell_(wave)
Type of seismic wave
continuum mechanics, a P wave (primary wave or pressure wave) is one of the two main types of elastic body waves or seismic waves. P waves travel faster than
P_wave
Propagating disturbance
wave, shockwave, or shock is a type of propagating disturbance that moves faster than the local speed of sound in the medium. Like an ordinary wave,
Shock_wave
Type of radio-wave propagation
miles) range of lower-angle sky-wave propagation. Direction finding of the NVIS sender is more difficult than for ground-wave communication (i.e. VHF or UHF)
Near vertical incidence skywave
Near_vertical_incidence_skywave
Scales to describe earthquake strength
is released, some of it in the form of various kinds of seismic waves that cause ground-shaking, or quaking. Magnitude is an estimate of the relative "size"
Seismic_magnitude_scales
Class of radio navigation systems
The result was a signal that offered a daytime ground wave range of 2,250 miles, nighttime ground wave of 1,650 miles and skywaves out to 3,000 miles
Hyperbolic_navigation
Technical term for mostly man-made phenomena
to ground vibrations. Ground vibrations are associated with different types of elastic waves propagating through the ground. These are surface waves, mostly
Ground_vibrations
Wave which is an oscillation of matter
waves, namely Rayleigh waves and Love waves. Rayleigh waves, also known as ground roll, are waves that travel as ripples with motion similar to waves
Mechanical_wave
Electromagnetic spectrum 300–3000 MHz
band between 2 and 4 GHz. Radio waves in the UHF band travel almost entirely by line-of-sight propagation (LOS) and ground reflection; unlike in the HF band
Ultra_high_frequency
Ionized part of Earth's upper atmosphere
frequency of transmitting waves and measured the fading caused by the interference with ground waves. They noted sky waves were weak in the day when stronger
Ionosphere
Distance over which a wave's shape repeats
that a wave travels through. Examples of waves are sound waves, light, water waves, and periodic electrical signals in a conductor. A sound wave is a variation
Wavelength
Faint earth tremor caused by natural phenomena
oscillation of the ground. The most energetic seismic waves that make up the microseismic field are Rayleigh waves, but Love waves can make up a significant
Microseism
Phenomenon resulting from the superposition of two waves
coherent waves are combined by adding their intensities or displacements with due consideration for their phase difference. The resultant wave may have
Wave_interference
Conduit for signal propagation
follow the contour of the Earth. These are called ground waves. AM broadcasting stations use ground waves to cover their listening areas. As the frequency
Transmission_medium
Terrestrial radio station for communication with spacecraft
(constituting part of the ground segment of the spacecraft system), or reception of radio waves from astronomical radio sources. Ground stations may be located
Ground_station
Sound generated by earthquakes
sometimes creating short-period seismic wave motion (ground motion) that reaches the air and becomes sounds (sound waves), and low sounds can be heard. This
Subterranean_rumbling
Sudden movement of the Earth's crust
geomorphological conditions, which may amplify or reduce wave propagation. The ground-shaking is measured by ground acceleration. Specific local geological, geomorphological
Earthquake
communications with ICBM launch control centers for the first time," and the Ground Wave Emergency Network communication system had a Final Environmental Impact
Strategic Automated Command and Control System
Strategic_Automated_Command_and_Control_System
Feminist movement, 1990s–2010s
Third-wave feminism is a feminist movement that began in the early 1990s; it was prominent in the decades prior to the fourth wave. Grounded in the civil-rights
Third-wave_feminism
Branch of astronomy using gravitational waves
their ground-breaking contributions in gravitational wave astronomy. When distant astronomical objects are observed using electromagnetic waves, different
Gravitational-wave_astronomy
than one that includes a direct attack upon the satellites. AN/URC-117 Ground Wave Emergency Network or GWEN, a retired military command and control communications
United States federal government continuity of operations
United_States_federal_government_continuity_of_operations
Monopole antenna
reflected current superpose, forming a standing wave consisting of the tail part of a sine wave. Due to ground reflections and the symmetrical placement of
Umbrella_antenna
Physical phenomenon
when the first-order refracted wave vanishes on the interface. Ground wave Zenneck wave Brekhovskikh, L. M. (1980). Waves in Layered Media (2nd ed.). Academic
Lateral_wave
Geologic events off the Alaska coast
re-evaluation of large-wave events and the recognition of impact events, rockfalls, and landslides as causes of very large waves. Lituya Bay is a fjord
1958 Lituya Bay earthquake and megatsunami
1958_Lituya_Bay_earthquake_and_megatsunami
1961 nuclear test explosion in New Mexico, United States
with underground testing. Everything from seismic signals, radiation, ground wave patterns, electromagnetic pulse, and acoustic measurements were studied
Project_Gnome_(nuclear_test)
Definition of directional radio frequency power
radio waves travel by ground wave as is typical for medium or longwave broadcasting, skywave, or indirect paths play a part in transmission, the waves will
Effective_radiated_power
German longwave time signal radio station
Further inaccuracies may be caused by the type of wave the receiver records. If pure ground wave reception is anticipated and the reception location
DCF77
Former US nuclear communications network
Center Survivable Low Frequency Communications System (SLFCS) AN/URC-117 Ground Wave Emergency Network (GWEN) Minimum Essential Emergency Communications Network
Post-Attack Command and Control System
Post-Attack_Command_and_Control_System
Control room for missile silos
government Emergency Rocket Communications System (ERCS) Game theory Ground Wave Emergency Network (GWEN) Minimum Essential Emergency Communications Network
Missile_launch_control_center
Music genre
the faster tempos and harder edge of punk rock forming ska-punk; and third-wave ska, which involved bands from a wide range of countries around the world
Ska
3–30 kHz range of the electromagnetic spectrum
wavelengths, VLF radio waves can diffract around large obstacles and so are not blocked by mountain ranges, and they can propagate as ground waves following the
Very_low_frequency
Residential in Vejle, Denmark
has been named as a ground-breaking architecture piece in modern times and a significant landmark of Vejle. The two first waves were finished in 2009
The_Wave_(Vejle)
Proposed gravitational wave detector
Einstein Telescope (ET), is a proposed third-generation ground-based gravitational wave (GW) detector, currently under study by some institutions in the
Einstein_Telescope
1981 novel by Todd Strasser/Morton Rhue
who has been in The Wave since the beginning, tries to get her to stop bad-mouthing it. He eventually shoves her to the ground and this makes him realize
The_Wave_(novel)
Device used to measure gravitational waves
gravitational-wave detector (used in a gravitational-wave observatory) is any device designed to measure tiny distortions of spacetime called gravitational waves.
Gravitational-wave observatory
Gravitational-wave_observatory
Electromagnetic wave range of 30–300 MHz
ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of
Very_high_frequency
Type of radio antenna
and shape of the ground plane used (if any). A quarter wave vertical antenna working against a perfectly conducting, infinite ground will have a gain
Whip_antenna
Weather phenomenon involving electrostatic discharge
as a bright flash. Lightning also causes thunder, a sound from the shock wave which develops as heated gases in the vicinity of the discharge experience
Lightning
Uninterrupted communications network during nuclear war
Command and Control System (PACCS) Airborne Launch Control System (ALCS) Ground Wave Emergency Network (GWEN) Survivable Low Frequency Communications System
Minimum Essential Emergency Communications Network
Minimum_Essential_Emergency_Communications_Network
Tall structures designed to support antennas
and MF bands, where radio waves propagate as ground waves which follow the contour of the Earth. The ground-hugging waves allowed the signals to travel
Radio_masts_and_towers
Transmission of radio waves intended to reach a wide audience
depending on atmospheric conditions. Long-wave AM broadcasting occurs in Europe, Asia, and Africa. The ground wave propagation at these frequencies is little
Radio_broadcasting
Movement of the Earth's surface
Ground motion is the movement of the Earth’s surface from earthquakes or explosions. Ground motion is produced by seismic waves that are generated by
Ground_motion
2013 EP by B1A4
album. The song "What's Happening(이게 무슨 일이야) took the first rank on the ground wave in Korea, May, 2013. What's Happening is one of the songs included on
What's_Happening?_(EP)
Electrically conductive surface, usually connected to electrical ground
radio waves. In printed circuit boards, a ground plane is a large area of copper foil on the board which is connected to the power supply ground terminal
Ground_plane
Increased fluid pressure and flow from an explosion
and safer buildings. Mach stem formation occurs when a blast wave reflects off the ground and the reflection catches up with the original shock front,
Blast_wave
Radio transmitter which emits radio waves in all directions, used as a navigational aid
350 kHz. Because the returning sky waves travel over a different path, they have a different phase from the ground wave. This has the effect of suppressing
Non-directional_beacon
Multilingual commercial broadcaster in Luxembourg
strength.[citation needed] In Caroline's primary reception areas, her ground wave signal was strong and unaffected during daylight hours by fading or interference
Radio_Luxembourg
2015 Norwegian disaster film by Roar Uthaug
The Wave (Norwegian: Bølgen) is a 2015 Norwegian disaster film directed by Roar Uthaug. It was Norway's official submission for the Academy Award for Best
The_Wave_(2015_film)
Prolonged period of excessively hot weather
A heat wave or heatwave, sometimes described as extreme heat, is a period of abnormally hot weather and natural disaster that lasts for multiple days.
Heat_wave
Radio transmission using wavelengths 200-1000 m
higher ground conductivity, and greatest distances over salt water. The groundwave reaches further on lower medium wave frequencies. Medium waves can also
Medium_wave
Measurement of the direction from which a received signal was transmitted
due to their limited interaction with the ground, and thereby provided excellent great circle route ground wave propagation that pointed directly to the
Direction_finding
American control plan
Possible Health Effects of Ground Wave Emergency Network (1993). Introduction - Assessment of the Possible Health Effects of Ground Wave Emergency Network -
ITT 465L Strategic Air Command Control System
ITT_465L_Strategic_Air_Command_Control_System
Military tactic
during the Iran–Iraq War, and the Russian Ground Forces and its allies in the Russo-Ukrainian War. Human wave attacks were used during the Boxer Rebellion
Human_wave_attack
Description of a quantum-mechanical system
Schrödinger equation is a partial differential equation that governs the wave function of a non-relativistic quantum-mechanical system. Its discovery was
Schrödinger_equation
GROUND WAVE
GROUND WAVE
Surname or Lastname
English
English : metonymic occupational name for a dealer in coarse meal, Old English grūt, Old Norse grautr ‘porridge’.
Surname or Lastname
English (chiefly West Midlands)
English (chiefly West Midlands) : nickname for a plump person, from Middle English, Old French rond, rund ‘fat’, ‘round’ (Latin rotundus).
Boy/Male
American, Anglo, British, English
Spear Protector
Surname or Lastname
English
English : unexplained. Compare Grounds.Perhaps an Americanized form of German Grund.
Surname or Lastname
English (Northumberland and Durham)
English (Northumberland and Durham) : nickname for a vain or haughty man, from Middle English prod, prud ‘proud’ (late Old English prūd, from the oblique form of Old French proz).
Surname or Lastname
English
English : variant of Gold.
Boy/Male
American, British, English
Spear Defender
Surname or Lastname
English
English : from Middle English p(o)und ‘enclosure (especially for confining animals)’; a topographic name for someone who lived near an enclosure in which animals were kept, or a metonymic occupational name for an official responsible for rounding up stray animals and placing them in a pound.Probably a translation of German Pfund or the North German cognate Pund.
Boy/Male
Norse
Growing.
Surname or Lastname
English
English : presumably a variant of Mount.
Boy/Male
Norse
Son of Hrafn the Foolish.
Girl/Female
Swedish
Defender of man.
Surname or Lastname
English
English : patronymic from Round.
Boy/Male
Hindu
Basil, Goddess Radha, Tulsi
Surname or Lastname
English (Devon)
English (Devon) : variant of Brand 1.
Surname or Lastname
English (chiefly Lancashire)
English (chiefly Lancashire) : probably a Middle English metathesized form of the Old French personal name Gondri, Gundric (see Gundry).
Boy/Male
Norse
Son of Thori.
Surname or Lastname
English
English : unexplained. There are four farms so named in Warwickshire, one in Oxfordshire, and one in Worcestershire, and the surname is most probably derived from one of these.
Surname or Lastname
English
English : variant of Bond
Surname or Lastname
English
English : perhaps an occupational name for a maker of bottles or cups, from Old French gourde ‘water vessel’, ‘flask’, but possibly of the same derivation as 2.French : from Old French gourd ‘heavy’, ‘dull’, ‘sluggish’, hence a nickname for a slow lumbering person.
GROUND WAVE
GROUND WAVE
Boy/Male
Tamil
Purvang | பூரà¯à®µà®¾à®‚கÂ
Prakashit
Boy/Male
Hindu, Indian
God Muruga
Male
English
English surname (Averill) transferred to forename use, AVERILL means "the hill sown with oats."
Girl/Female
African, American, Arabic, Armenian, Australian, British, Chinese, Christian, Czechoslovakian, Danish, Dutch, English, Finnish, French, German, Hawaiian, Hebrew, Irish, Jewish, Latin, Portuguese, Swedish
Sea of Bitterness; Biblical Name; Rebelliousness; Star of the Sea; Wished-for Child; Bitter; Sea of Sorrow; Prophetess; Scraped; Rocks; Beloved
Girl/Female
Indian, Sanskrit
Abominable
Girl/Female
Indian
Red
Girl/Female
Indian
Successful, Prosperous
Girl/Female
Tamil
Sindhuja | ஸிநà¯à®¤à¯à®œà®¾
Goddess Lakshmi, Born of the ocean
Boy/Male
Italian American
A title name ranking below duke and above earl.
Surname or Lastname
English
English : from a Middle English personal name, Cade, a survival of the Old English personal name or byname Cada, which is probably from a Germanic root meaning ‘lump’, ‘swelling’.English : metonymic occupational name for a cooper, from Middle English, Old French cade ‘cask’, ‘barrel’ (of Germanic origin, probably akin to the root mentioned in 1).English : nickname for a gentle or inoffensive person, from Middle English cade ‘domestic animal’, ‘pet’ (of unknown origin).French (Cadé) : topographic name from cade ‘juniper’ (from Latin catanus).Bearers of the name Caddé, from Amiens, were documented in Quebec city by 1670.
GROUND WAVE
GROUND WAVE
GROUND WAVE
GROUND WAVE
GROUND WAVE
a.
Uttered or emitted with a full tone; as, a round voice; a round note.
imp. & p. p.
of Grind
n.
An assembly; a group; a circle; as, a round of politicians.
n.
Anything round, as a circle, a globe, a ring. "The golden round" [the crown].
a.
Round.
n.
Sediment at the bottom of liquors or liquids; dregs; lees; feces; as, coffee grounds.
n.
That which goes round a whole circle or company; as, a round of applause.
imp. & p. p.
of Ground
adv. & a.
On the ground; stranded; -- a nautical term applied to a ship when its bottom lodges on the ground.
v. t.
To go round wholly or in part; to go about (a corner or point); as, to round a corner; to round Cape Horn.
v. t.
To cover with a ground, as a copper plate for etching (see Ground, n., 5); or as paper or other materials with a uniform tint as a preparation for ornament.
a.
Built with groins; as, a groined ceiling; a groined vault.
n.
Any definite portion of the earth's surface; region; territory; country. Hence: A territory appropriated to, or resorted to, for a particular purpose; the field or place of action; as, a hunting or fishing ground; a play ground.
prep.
On every side of, so as to encompass or encircle; around; about; as, the people atood round him; to go round the city; to wind a cable round a windlass.
v. t.
To found; to fix or set, as on a foundation, reason, or principle; to furnish a ground for; to fix firmly.
v. i.
To run aground; to strike the bottom and remain fixed; as, the ship grounded on the bar.
v. t.
To lay, set, or run, on the ground.
v. t.
To connect with the ground so as to make the earth a part of an electrical circuit.
adv.
On all sides; around.