L band
This article is about the IEEE dened range of the radiospectrum.
For other uses, see L band (disambiguation).
L band, as dened by the IEEE, is the 1 to 2 GHz rangeof the
radio spectrum.
1 Applications
1.1 Satellite navigationThe Global Positioning System carriers
are in the L band,centered at 1176.45 MHz (L5), 1227.60 MHz
(L2),1381.05 MHz (L3), and 1575.42 MHz (L1) frequencies.
The Galileo Navigation System uses the L-bandsimilarly to
GPS.
The GLONASS System uses the L-band similarly toGPSs.
1.2 Telecommunications useGSMmobile phones operate at 800900 and
18001900MHz. Iridium Satellite LLC phones use frequencies be-tween
1616 and 1626.5 MHz[1] to communicate with thesatellites. Inmarsat
and LightSquared terminals use fre-quencies between 1525 and
1646.5MHz to communicatewith the satellites. Thuraya satellite
phones use frequen-cies between 1525 and 1661 MHz to communicate
withthe satellites.
1.3 Aircraft surveillanceAircraft can use Automatic dependent
surveillance-broadcast (ADS-B) equipment at 1090 MHz to
commu-nicate position information to the ground as well as be-tween
them for trac information and avoidance. The1090 MHz frequency (in
pair with 1030 MHz frequency)is also used by Mode S transponders,
which ADS-B ex-tends when operated at this frequency. ADS-B
informa-tion can also be broadcast just outside the L band rangeat
978 MHz.
1.4 Amateur radioThe Radio Regulations of the International
Telecommu-nication Union allow amateur radio operations in the
fre-
quency range 1,240 to 1,300 MHz, and amateur satelliteup-links
are allowed in the range 1,260 to 1,270 MHz.This is known as the
23-centimeter band by radio ama-teurs and the L-band by AMSAT.
1.5 Digital Audio BroadcastingIn the United States and overseas
territories, the L band isheld by the military for telemetry,
thereby forcing digitalradio to in-band on-channel (IBOC)
solutions. DigitalAudio Broadcasting (DAB) is typically done in the
14521492-MHz range as in most of the world, but other coun-tries
also use VHF and UHF bands.WorldSpace satellite radio broadcasts in
the 14671492MHz L sub-band.
1.6 AstronomyThe band also contains the hyperne transition of
neu-tral hydrogen (the hydrogen line, 1420 MHz), which isof great
astronomical interest as a means of imaging thenormally invisible
neutral atomic hydrogen in interstellarspace. Consequently parts of
the L-band are protectedradio astronomy allocations worldwide.
2 References[1]
http://www.fcc.gov/Bureaus/International/Orders/1995/
da950131.txt
1
2 3 TEXT AND IMAGE SOURCES, CONTRIBUTORS, AND LICENSES
3 Text and image sources, contributors, and licenses3.1 Text
L band Source:
http://en.wikipedia.org/wiki/L%20band?oldid=651108812 Contributors:
Bryan Derksen, Radiojon, Denelson83, Senthil,Fleminra, Wasabie,
Chmod007, UltraAyla, Sparkgap, Towel401, Atlant, Keenan Pepper,
Gpvos, Gene Nygaard, Crosbiesmith, MartinVil-lafuerte85, Eyreland,
Vegaswikian, Smiker, Krash, Srleer, YurikBot, Dddstone, Igin,
Ninly, Mhardcastle, Sardanaphalus, Modest Ge-nius, Tsca.bot,
Kcordina, DinosaursLoveExistence, Cybercobra, A.R., Iridescent,
BeenAroundAWhile, Mjnunan, Java13690, Conquerist,Jim.henderson,
Cairan, DrKiernan, Ai4ijoel, TXiKiBoT, Cryonic07, Lightmouse,
Fratrep, Wutsje, Jonverve, Addbot, RTG, Lightbot,Luckas-bot,
AnomieBOT, Globe Collector, Updatehelper, WikitanvirBot, Ebrambot,
L Kensington, Kogmaw and Anonymous: 45
3.2 Images
3.3 Content license Creative Commons Attribution-Share Alike
3.0
Applications Satellite navigation Telecommunications use
Aircraft surveillance Amateur radio Digital Audio Broadcasting
Astronomy
References Text and image sources, contributors, and
licensesTextImagesContent license
