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Skywave, the Glossary

In radio communication, skywave or skip refers to the propagation of radio waves reflected or refracted back toward Earth from the ionosphere, an electrically charged layer of the upper atmosphere.^[1]

71 relations: AM broadcasting, Amateur radio, Amateur radio operator, Atmosphere of Earth, Broadcasting, Cable & Wireless plc, Canada, Cape Verde, Clear-channel station, Cornwall, Cosmic ray, Diffuse reflection, Digital Radio Mondiale, DXing, F region, Fading, Frequency, General Post Office, Geomagnetic storm, Ground wave, Guglielmo Marconi, High frequency, History of amateur radio, History of radio, Horizon, Imperial Wireless Chain, Index of electronics articles, Ion, Ionization, Ionosphere, Kennelly–Heaviside layer, Line-of-sight propagation, Longwave, Mast radiator, Maximum usable frequency, Medium wave, MW DX, Near vertical incidence skywave, Newfoundland and Labrador, Non-line-of-sight propagation, Over-the-horizon radar, Photon, Plasma (physics), Poldhu, Project West Ford, Radio, Radio frequency, Radio propagation, Radio wave, Reflection (physics), ... Expand index (21 more) »
Ionosphere
Surface waves

AM broadcasting

AM broadcasting is radio broadcasting using amplitude modulation (AM) transmissions. Skywave and aM broadcasting are broadcast engineering.

See Skywave and AM broadcasting

Amateur radio

Amateur radio, also known as ham radio, is the use of the radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communications.

See Skywave and Amateur radio

Amateur radio operator

An amateur radio operator is someone who uses equipment at an amateur radio station to engage in two-way personal communications with other amateur operators on radio frequencies assigned to the amateur radio service.

See Skywave and Amateur radio operator

Atmosphere of Earth

The atmosphere of Earth is composed of a layer of gas mixture that surrounds the Earth's planetary surface (both lands and oceans), known collectively as air, with variable quantities of suspended aerosols and particulates (which create weather features such as clouds and hazes), all retained by Earth's gravity.

See Skywave and Atmosphere of Earth

Broadcasting

Broadcasting is the distribution of audio or video content to a dispersed audience via any electronic mass communications medium, but typically one using the electromagnetic spectrum (radio waves), in a one-to-many model.

See Skywave and Broadcasting

Cable & Wireless plc

Cable & Wireless plc was a British telecommunications company.

See Skywave and Cable & Wireless plc

Canada

Canada is a country in North America.

See Skywave and Canada

Cape Verde

Cape Verde or Cabo Verde, officially the Republic of Cabo Verde, is an archipelago and island country of West Africa in the central Atlantic Ocean, consisting of ten volcanic islands with a combined land area of about.

See Skywave and Cape Verde

Clear-channel station

A clear-channel station is a North American AM radio station that has the highest level of protection from interference from other stations, particularly from nighttime skywave signals.

See Skywave and Clear-channel station

Cornwall

Cornwall (Kernow;; or) is a ceremonial county in South West England.

See Skywave and Cornwall

Cosmic ray

Cosmic rays or astroparticles are high-energy particles or clusters of particles (primarily represented by protons or atomic nuclei) that move through space at nearly the speed of light.

See Skywave and Cosmic ray

Diffuse reflection

Diffuse reflection is the reflection of light or other waves or particles from a surface such that a ray incident on the surface is scattered at many angles rather than at just one angle as in the case of specular reflection.

See Skywave and Diffuse reflection

Digital Radio Mondiale

Digital Radio Mondiale (DRM; mondiale being Italian and French for "worldwide") is a set of digital audio broadcasting technologies designed to work over the bands currently used for analogue radio broadcasting including AM broadcasting—particularly shortwave—and FM broadcasting.

See Skywave and Digital Radio Mondiale

DXing

DXing, taken from DX, the telegraphic shorthand for "distance" or "distant", is the hobby of receiving and identifying distant radio or television signals, or making two-way radio contact with distant stations in amateur radio, citizens band radio or other two-way radio communications.

See Skywave and DXing

F region

The F region of the ionosphere is home to the F layer of ionization, also called the Appleton–Barnett layer, after the English physicist Edward Appleton and New Zealand physicist and meteorologist Miles Barnett. Skywave and f region are ionosphere and radio frequency propagation.

See Skywave and F region

Fading

In wireless communications, fading is the variation of signal attenuation over variables like time, geographical position, and radio frequency.

See Skywave and Fading

Frequency

Frequency (symbol f), most often measured in hertz (symbol: Hz), is the number of occurrences of a repeating event per unit of time.

See Skywave and Frequency

General Post Office

The General Post Office (GPO) was the state postal system and telecommunications carrier of the United Kingdom until 1969.

See Skywave and General Post Office

Geomagnetic storm

A geomagnetic storm, also known as a magnetic storm, is a temporary disturbance of the Earth's magnetosphere caused by a solar wind shock wave. Skywave and geomagnetic storm are ionosphere.

See Skywave and Geomagnetic storm

Ground wave

Ground wave is a mode of radio propagation that consists of currents traveling through the earth. Skywave and Ground wave are radio frequency propagation.

See Skywave and Ground wave

Guglielmo Marconi

Guglielmo Giovanni Maria Marconi, 1st Marquis of Marconi (25 April 187420 July 1937) was an Italian inventor, electrical engineer, and politician, known for his creation of a practical radio wave–based wireless telegraph system.

See Skywave and Guglielmo Marconi

High frequency

High frequency (HF) is the ITU designation for the band of radio waves with frequency between 3 and 30 megahertz (MHz).

See Skywave and High frequency

History of amateur radio

The history of amateur radio, dates from the dawn of radio communications, with published instructions for building simple wireless sets appearing at the beginning of the twentieth century.

See Skywave and History of amateur radio

History of radio

The early history of radio is the history of technology that produces and uses radio instruments that use radio waves.

See Skywave and History of radio

Horizon

The horizon is the apparent curve that separates the surface of a celestial body from its sky when viewed from the perspective of an observer on or near the surface of the relevant body.

See Skywave and Horizon

Imperial Wireless Chain

The Imperial Wireless Chain was a strategic international communications network of powerful long range radiotelegraphy stations, created by the British government to link the countries of the British Empire.

See Skywave and Imperial Wireless Chain

Index of electronics articles

This is an index of articles relating to electronics and electricity or natural electricity and things that run on electricity and things that use or conduct electricity.

See Skywave and Index of electronics articles

Ion

An ion is an atom or molecule with a net electrical charge.

See Skywave and Ion

Ionization

Ionization (or ionisation specifically in Britain, Ireland, Australia and New Zealand) is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons, often in conjunction with other chemical changes.

See Skywave and Ionization

Ionosphere

The ionosphere is the ionized part of the upper atmosphere of Earth, from about to above sea level, a region that includes the thermosphere and parts of the mesosphere and exosphere. Skywave and ionosphere are radio frequency propagation.

See Skywave and Ionosphere

Kennelly–Heaviside layer

The Heaviside layer, sometimes called the Kennelly–Heaviside layer, named after Arthur E. Kennelly and Oliver Heaviside, is a layer of ionised gas occurring roughly between 90km and 150 km (56 and 93 mi) above the ground — one of several layers in the Earth's ionosphere. Skywave and Kennelly–Heaviside layer are ionosphere and radio frequency propagation.

See Skywave and Kennelly–Heaviside layer

Line-of-sight propagation

Line-of-sight propagation is a characteristic of electromagnetic radiation or acoustic wave propagation which means waves can only travel in a direct visual path from the source to the receiver without obstacles. Skywave and Line-of-sight propagation are radio frequency propagation.

See Skywave and Line-of-sight propagation

Longwave

In radio, longwave, long wave or long-wave, and commonly abbreviated LW, refers to parts of the radio spectrum with wavelengths longer than what was originally called the medium-wave broadcasting band.

See Skywave and Longwave

Mast radiator

A mast radiator (or radiating tower) is a radio mast or tower in which the metal structure itself is energized and functions as an antenna. Skywave and mast radiator are broadcast engineering.

See Skywave and Mast radiator

Maximum usable frequency

In radio transmission, maximum usable frequency (MUF) is the highest radio frequency that can be used for transmission between two points on Earth by reflection from the ionosphere (skywave or skip) at a specified time, independent of transmitter power. Skywave and maximum usable frequency are radio frequency propagation.

See Skywave and Maximum usable frequency

Medium wave

Medium wave (MW) is a part of the medium frequency (MF) radio band used mainly for AM radio broadcasting.

See Skywave and Medium wave

MW DX

MW DX, short for mediumwave DXing, is the hobby of receiving distant mediumwave (also known as AM) radio stations. Skywave and mW DX are radio frequency propagation.

See Skywave and MW DX

Near vertical incidence skywave

Near vertical incidence skywave, or NVIS, is a skywave radio-wave propagation path that provides usable signals in the medium distances range — usually. Skywave and Near vertical incidence skywave are ionosphere and radio frequency propagation.

See Skywave and Near vertical incidence skywave

Newfoundland and Labrador

Newfoundland and Labrador (Terre-Neuve-et-Labrador; frequently abbreviated as NL) is the easternmost province of Canada, in the country's Atlantic region.

See Skywave and Newfoundland and Labrador

Non-line-of-sight propagation

Non-line-of-sight (NLOS) radio propagation occurs outside of the typical line-of-sight (LOS) between the transmitter and receiver, such as in ground reflections. Skywave and Non-line-of-sight propagation are radio frequency propagation.

See Skywave and Non-line-of-sight propagation

Over-the-horizon radar

Over-the-horizon radar (OTH), sometimes called beyond the horizon radar (BTH), is a type of radar system with the ability to detect targets at very long ranges, typically hundreds to thousands of kilometres, beyond the radar horizon, which is the distance limit for ordinary radar.

See Skywave and Over-the-horizon radar

Photon

A photon is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force.

See Skywave and Photon

Plasma (physics)

Plasma is one of four fundamental states of matter (the other three being solid, liquid, and gas) characterized by the presence of a significant portion of charged particles in any combination of ions or electrons.

See Skywave and Plasma (physics)

Poldhu

Poldhu is a small area in south Cornwall, England, UK, situated on the Lizard Peninsula; it comprises Poldhu Point and Poldhu Cove.

See Skywave and Poldhu

Project West Ford

Project West Ford (also known as Westford Needles and Project Needles) was a test carried out by Massachusetts Institute of Technology's Lincoln Laboratory on behalf of the United States military in 1961 and 1963 to create an artificial ionosphere above the Earth.

See Skywave and Project West Ford

Radio

Radio is the technology of communicating using radio waves.

See Skywave and Radio

Radio frequency

Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around to around.

See Skywave and Radio frequency

Radio propagation

Radio propagation is the behavior of radio waves as they travel, or are propagated, from one point to another in vacuum, or into various parts of the atmosphere. Skywave and radio propagation are radio frequency propagation.

See Skywave and Radio propagation

Radio wave

Radio waves are a type of electromagnetic radiation with the lowest frequencies and the longest wavelengths in the electromagnetic spectrum, typically with frequencies below 300 gigahertz (GHz) and wavelengths greater than, about the diameter of a grain of rice.

See Skywave and Radio wave

Reflection (physics)

Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated.

See Skywave and Reflection (physics)

Refraction

In physics, refraction is the redirection of a wave as it passes from one medium to another.

See Skywave and Refraction

Schumann resonances

The Schumann resonances (SR) are a set of spectrum peaks in the extremely low frequency portion of the Earth's electromagnetic field spectrum. Skywave and Schumann resonances are ionosphere.

See Skywave and Schumann resonances

Shortwave radio

Shortwave radio is radio transmission using radio frequencies in the shortwave bands (SW).

See Skywave and Shortwave radio

Skip zone

A skip zone, also called a silent zone or zone of silence, is a region where a radio transmission can not be received. Skywave and skip zone are radio frequency propagation.

See Skywave and Skip zone

Solar particle event

In solar physics, a solar particle event (SPE), also known as a solar energetic particle event or solar radiation storm, is a solar phenomenon which occurs when particles emitted by the Sun, mostly protons, become accelerated either in the Sun's atmosphere during a solar flare or in interplanetary space by a coronal mass ejection shock.

See Skywave and Solar particle event

Sporadic E propagation

Sporadic E (abbreviated E or SpE) is an uncommon form of radio propagation using a low level of the Earth's ionosphere that normally does not refract radio waves above about 15 MHz. Skywave and Sporadic E propagation are ionosphere and radio frequency propagation.

See Skywave and Sporadic E propagation

St. John's, Newfoundland and Labrador

St.

See Skywave and St. John's, Newfoundland and Labrador

Sudden ionospheric disturbance

A sudden ionospheric disturbance (SID) is any one of several ionospheric perturbations, resulting from abnormally high ionization/plasma density in the D region of the ionosphere and caused by a solar flare and/or solar particle event (SPE). Skywave and sudden ionospheric disturbance are ionosphere and radio frequency propagation.

See Skywave and Sudden ionospheric disturbance

Sunspot

Sunspots are temporary spots on the Sun's surface that are darker than the surrounding area.

See Skywave and Sunspot

Tropospheric propagation

Tropospheric propagation describes electromagnetic propagation in relation to the troposphere. Skywave and Tropospheric propagation are radio frequency propagation.

See Skywave and Tropospheric propagation

TV and FM DX

TV DX and FM DX is the active search for distant radio or television stations received during unusual atmospheric conditions. Skywave and tV and FM DX are radio frequency propagation.

See Skywave and TV and FM DX

Ultra high frequency

Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one tenth of a meter (one decimeter).

See Skywave and Ultra high frequency

Utility station

The term utility station is used to describe fixed radio broadcasters disseminating signals that are not intended for reception by the general public (but such members are not actively prohibited from receiving).

See Skywave and Utility station

Very high frequency

Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter.

See Skywave and Very high frequency

Very low frequency

Very low frequency or VLF is the ITU designation for radio frequencies (RF) in the range of 3–30 kHz, corresponding to wavelengths from 100 to 10 km, respectively.

See Skywave and Very low frequency

Wave interference

In physics, interference is a phenomenon in which two coherent waves are combined by adding their intensities or displacements with due consideration for their phase difference.

See Skywave and Wave interference

10-meter band

The 10-meter band is a portion of the shortwave radio spectrum internationally allocated to amateur radio and amateur satellite use on a primary basis.

See Skywave and 10-meter band

15-meter band

The 15-meter band (also called the 21-MHz band or 15 meters) is an amateur radio frequency band spanning the shortwave spectrum from 21 to 21.45 MHz.

See Skywave and 15-meter band

20-meter band

The 20-meter or 14-MHz amateur radio band is a portion of the shortwave radio spectrum, comprising frequencies stretching from 14.000 MHz to 14.350 MHz.

See Skywave and 20-meter band

40-meter band

The 40-meter or 7-MHz band is an amateur radio frequency band, spanning 7.000-7.300 MHz in ITU Region 2, and 7.000-7.200 MHz in Regions 1 & 3.

See Skywave and 40-meter band

80-meter band

The 80 meter or 3.5 MHz band is a span of radio frequencies allocated for amateur use, from 3.5–4.0 MHz in North and South America (IARU and ITU Region 2); generally 3.5–3.8 MHz in Europe, Africa, and northern Asia (Region 1); and 3.5–3.9 MHz in south and east Asia and the eastern Pacific (Region 3).

See Skywave and 80-meter band

References

[1] https://en.wikipedia.org/wiki/Skywave

Also known as Ionospheric propagation, Ionospheric radio propagation, Ionospheric reflection, Shooting skip, Skip (radio), Sky wave, Sky-wave.

, Refraction, Schumann resonances, Shortwave radio, Skip zone, Solar particle event, Sporadic E propagation, St. John's, Newfoundland and Labrador, Sudden ionospheric disturbance, Sunspot, Tropospheric propagation, TV and FM DX, Ultra high frequency, Utility station, Very high frequency, Very low frequency, Wave interference, 10-meter band, 15-meter band, 20-meter band, 40-meter band, 80-meter band.

Skywave, the Glossary

Table of Contents

See also

Ionosphere

Surface waves

References