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S Band
The S BAND is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a part of the microwave band of the electromagnetic spectrum covering frequencies from 2 to 4 gigahertz (GHz). Thus it crosses the conventional boundary between the UHF and SHF bands at 3.0 GHz. The S band is used by weather radar , surface ship radar , and some communications satellites , especially those used by NASA
NASA
to communicate with the Space Shuttle
Space Shuttle
and the International Space Station
International Space Station
. The 10 cm radar short-band ranges roughly from 1.55 to 5.2 GHz
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Band V
BAND V (meaning Band 5) is the name of a radio frequency range within the ultra high frequency part of the electromagnetic spectrum . It is not to be confused with the V band in the extremely high frequency part of the spectrum. Sources differ on the exact frequency range of UHF Band V. For example, the Broadcast engineer's reference book and the BBC
BBC
define the range as 614 to 854 MHz
MHz
. The IPTV India Forum define the range as 582 to 806 MHz
MHz
and the DVB Worldwide website refers to the range as 585 to 806 MHz
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Band IV
BAND IV is the name of a radio frequency range within the ultra high frequency part of the electromagnetic spectrum . Sources differ on the exact frequency range of the band. For example, the Swiss Federal Office of Communications, the Broadcast engineer's reference book and Ericsson
Ericsson
India Ltd all define the range of Band IV from 470 to 582 MHz
MHz
. An EICTA paper defines the range as 474 to 602 MHz, whilst the BBC
BBC
define the range as 470 to 614 MHz. Band IV is primarily used for analogue and digital ( DVB-T
DVB-T
, ATSC
ATSC
and ISDB
ISDB
) television broadcasting, as well as services intended for mobile devices such as DVB-H
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Band II
BAND or BAND may refer to: CONTENTS * 1 Science and technology * 2 Music * 3 Clothing, jewelry, and accessories * 4 Organizations * 5 Places * 6 Society and government * 7 Other uses * 8 See also SCIENCE AND TECHNOLOGY* Band (radio) , a range of frequencies or wavelengths in radio and radar, specifically: * Shortwave bands * UMTS frequency bands used for cellphones * LTE
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Hertz
The HERTZ (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second . It is named for Heinrich Rudolf Hertz
Hertz
, the first person to provide conclusive proof of the existence of electromagnetic waves . Hertz
Hertz
are commonly expressed in multiples : kilohertz (103 Hz, kHz), megahertz (106 Hz, MHz), gigahertz (109 Hz, GHz), and terahertz (1012 Hz, THz). Some of the unit's most common uses are in the description of sine waves and musical tones , particularly those used in radio - and audio-related applications. It is also used to describe the speeds at which computers and other electronics are driven
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Band VI
BAND or BAND may refer to: CONTENTS * 1 Science and technology * 2 Music * 3 Clothing, jewelry, and accessories * 4 Organizations * 5 Places * 6 Society and government * 7 Other uses * 8 See also SCIENCE AND TECHNOLOGY* Band (radio) , a range of frequencies or wavelengths in radio and radar, specifically: * Shortwave bands * UMTS frequency bands used for cellphones * LTE
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Institute Of Electrical And Electronics Engineers
The INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE) is a professional association with its corporate office in New York City and its operations center in Piscataway, New Jersey . It was formed in 1963 from the amalgamation of the American Institute of Electrical Engineers and the Institute of Radio Engineers . Today, it is the world's largest association of technical professionals with more than 420,000 members in over 160 countries around the world. Its objectives are the educational and technical advancement of electrical and electronic engineering , telecommunications , computer engineering and allied disciplines
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Meter
The METRE (international spelling ) or METER (American spelling ) (from the Greek noun μέτρον, "measure") is the base unit of length in the International System of Units (SI). The SI unit symbol is M. The metre is defined as the length of the path travelled by light in a vacuum in 1/299 792 458 seconds . The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole . In 1799, it was redefined in terms of a prototype metre bar (the actual bar used was changed in 1889). In 1960, the metre was redefined in terms of a certain number of wavelengths of a certain emission line of krypton-86 . In 1983, the current definition was adopted. The imperial inch is defined as 0.0254 metres (2.54 centimetres or 25.4 millimetres). One metre is about  3 3⁄8 inches longer than a yard , i.e. about  39 3⁄8 inches
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Weather Radar
WEATHER RADAR, also called WEATHER SURVEILLANCE RADAR (WSR) and DOPPLER WEATHER RADAR, is a type of radar used to locate precipitation , calculate its motion, and estimate its type (rain, snow, hail etc.). Modern weather radars are mostly pulse-Doppler radars , capable of detecting the motion of rain droplets in addition to the intensity of the precipitation. Both types of data can be analyzed to determine the structure of storms and their potential to cause severe weather . During World War II, radar operators discovered that weather was causing echoes on their screen, masking potential enemy targets. Techniques were developed to filter them, but scientists began to study the phenomenon. Soon after the war, surplus radars were used to detect precipitation. Since then, weather radar has evolved on its own and is now used by national weather services, research departments in universities, and in television newscasts
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Gigahertz
The HERTZ (symbol: Hz) is the derived unit of frequency in the International System of Units
International System of Units
(SI) and is defined as one cycle per second . It is named for Heinrich Rudolf Hertz
Hertz
, the first person to provide conclusive proof of the existence of electromagnetic waves . Hertz
Hertz
are commonly expressed in multiples : kilohertz (103 Hz, kHz), megahertz (106 Hz, MHz), gigahertz (109 Hz, GHz), and terahertz (1012 Hz, THz). Some of the unit's most common uses are in the description of sine waves and musical tones , particularly those used in radio - and audio-related applications. It is also used to describe the speeds at which computers and other electronics are driven
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Frequency
FREQUENCY is the number of occurrences of a repeating event per unit of time . It is also referred to as TEMPORAL FREQUENCY, which emphasizes the contrast to spatial frequency and angular frequency . The PERIOD is the duration of time of one cycle in a repeating event, so the period is the reciprocal of the frequency. For example, if a newborn baby's heart beats at a frequency of 120 times a minute, its period—the time interval between beats—is half a second (that is, 60 seconds divided by 120 beats ). Frequency
Frequency
is an important parameter used in science and engineering to specify the rate of oscillatory and vibratory phenomena, such as mechanical vibrations, audio (sound ) signals, radio waves , and light
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C Band (NATO)
BAND or BAND may refer to: CONTENTS * 1 Science and technology * 2 Music * 3 Clothing, jewelry, and accessories * 4 Organizations * 5 Places * 6 Society and government * 7 Other uses * 8 See also SCIENCE AND TECHNOLOGY* Band (radio) , a range of frequencies or wavelengths in radio and radar, specifically: * Shortwave bands * UMTS frequency bands used for cellphones * LTE
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J Band (NATO)
The NATO J BAND is the obsolete designation given to the radio frequencies from 10 to 20 GHz
GHz
(equivalent to wavelengths between 3 and 1.5 cm) during the cold war period. Since 1992 frequency allocations, allotment and assignments are in line to NATO Joint Civil/Military Frequency Agreement (NJFA). However, in order to identify military radio spectrum requirements, e.g. for crises management planning, training, Electronic warfare
Electronic warfare
activities, or in military operations, this system is still in use
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Band I
BAND I is a range of radio frequencies within the very high frequency (VHF) part of the electromagnetic spectrum . Band I ranges from 47 to 68 MHz
MHz
for the European Broadcasting
Broadcasting
Area, and from 54 to 88 MHz
MHz
for the Americas and it is primarily used for broadcasting service (television broadcasting ) in line to ITU Radio Regulations (article 1.38). Channel spacings vary from country to country, with spacings of 6, 7 and 8 MHz
MHz
being common
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Electromagnetic Spectrum
The ELECTROMAGNETIC SPECTRUM is a collective term; referring to the entire range and scope of frequencies of electromagnetic radiation and their respective, associated photon wavelengths. The electromagnetic spectrum extends from below the low frequencies used for modern radio communication to gamma radiation at the short-wavelength (high-frequency) end, thereby covering wavelengths from thousands of kilometers down to a fraction of the size of an atom . Visible light lies toward the shorter end, with wavelengths from 400 to 700 nanometres . The limit for long wavelengths is the size of the universe itself, while it is thought that the short wavelength limit is in the vicinity of the Planck length . Until the middle of the 20th century it was believed by most physicists that this spectrum was infinite and continuous . Nearly all types of electromagnetic radiation can be used for spectroscopy , to study and characterize matter
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Band III
BAND III is the name of the range of radio frequencies within the very high frequency (VHF) part of the electromagnetic spectrum from 174 to 240 megahertz (MHz). It is primarily used for radio and television broadcasting. It is also called HIGH-BAND VHF, in contrast to Bands I and II. CONTENTS* 1 Broadcast Television
Television
* 1.1 North America * 1.2 Europe * 1.3 Russia and other former members of OIRT * 2 Radio
Radio
* 3 Worldwide usage * 3.1 Europe * 3.2 North America * 4 References BROADCAST TELEVISIONNORTH AMERICAThe band is subdivided into seven channels for television broadcasting, each occupying 6 MHz. CHANNEL FREQUENCY RANGE 7 174-180 MHz 8 180-186 MHz 9 186-192 MHz 10 192-198 MHz 11 198-204 MHz 12 204-210 MHz 13 210-216 MHzEUROPEEuropean Band III allocations vary from country to country, with channel widths of 7 or 8 MHz
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