|Part of series on|
|Radio (overland) • Satellite radio • Internet radio|
|Uses and forms|
|Talk radio • Internet talk radio • Music radio • Call-in (radio)|
|Most listened-to programs •|
|Physics and engineering|
|Radio waves • Radio tower • Radio signal|
Satellite radio is defined by the International Telecommunication Union (ITU)'s ITU Radio Regulations (RR) as a broadcasting-satellite service .The satellite's signals are broadcast nationwide, across a much wider geographical area than terrestrial radio stations, and the service is primarily intended for the occupants of motor vehicles. It is available by subscription, mostly commercial free, and offers subscribers more stations and a wider variety of programming options than terrestrial radio.
Satellite radio technology was inducted into the Space Foundation Space Technology Hall of Fame in 2002. GHz S band in North America for nationwide digital radio broadcasting. In other parts of the world, satellite radio uses the 1.4 GHz L band allocated for DAB.Satellite radio uses the 2.3
The first satellite radio broadcasts occurred in Africa and the Middle East in 1999. The first US broadcasts were in 2001 followed by Japan in 2004 and Canada in 2005.
There have been three (not counting MobaHo! of Japan) major satellite radio companies: WorldSpace, Sirius Satellite Radio and XM Satellite Radio, all founded in the 1990s in the United States. WorldSpace operated in the Africa and Asia region, whereas Sirius and XM competed in the North American (USA and Canada) market. Of the three companies, WorldSpace went bankrupt in 2009 and Sirius and XM merged in 2008 to form Sirius XM. The merger was done to avoid bankruptcy. The new company had financial problems and was within days of bankruptcy in 2009, but was able to find investors. The company did not go bankrupt and Sirius XM Satellite radio continues (as of 2020 [update] ) to operate.
WorldSpace was founded by Ethiopia-born lawyer Noah Samara in Washington, D.C., in 1990,with the goal of making satellite radio programming available to the developing world. On June 22, 1991, the FCC gave WorldSpace permission to launch a satellite to provide digital programming to Africa and the Middle East. WorldSpace first began broadcasting satellite radio on October 1, 1999, in Africa. India would ultimately account for over 90% of WorldSpace’s subscriber base. In 2008, WorldSpace announced plans to enter Europe, but those plans were set aside when the company filed for Chapter 11 bankruptcy in November 2008. In March 2010, the company announced it would be de-commissioning its two satellites (one served Asia, the other served Africa). Liberty Media, which owns 50% of Sirius XM Radio, had considered purchasing WorldSpace’s assets, but talks between the companies collapsed. The satellites are now transmitting educational data and operate under the name of Yazmi USA, LLC.
Ondas Media was a Spanish company which had proposed to launch a subscription-based satellite radio system to serve Spain and much of Western Europe, but failed to acquire licenses throughout Europe.[ citation needed ]
Onde Numérique was a French company which had proposed to launch a subscription-based satellite radio system to serve France and several other countries in Western Europe but has suspended its plans indefinitely, effective December, 2016.[ citation needed ]
Sirius Satellite Radio was founded by Martine Rothblatt, David Margolese and Robert Briskman.In June 1990, Rothblatt's shell company, Satellite CD Radio, Inc., petitioned the Federal Communications Commission (FCC) to assign new frequencies for satellites to broadcast digital sound to homes and cars. The company identified and argued in favor of the use of the S-band frequencies that the FCC subsequently decided to allocate to digital audio broadcasting. The National Association of Broadcasters contended that satellite radio would harm local radio stations.
In April 1992, Rothblatt resigned as CEO of Satellite CD Radio;former NASA engineer Robert Briskman, who designed the company's satellite technology, was then appointed chairman and CEO. Six months later, Rogers Wireless co-founder David Margolese, who had provided financial backing for the venture, acquired control of the company and succeeded Briskman. Margolese renamed the company CD Radio, and spent the next five years lobbying the FCC to allow satellite radio to be deployed, and the following five years raising $1.6 billion, which was used to build and launch three satellites into elliptical orbit from Kazakhstan in July 2000. In 1997, after Margolese had obtained regulatory clearance and "effectively created the industry," the FCC also sold a license to the American Mobile Radio Corporation, which changed its name to XM Satellite Radio in October 1998. XM was founded by Lon Levin and Gary Parsons, who served as chairman until November 2009.
CD Radio purchased their license for $83.3 million, and American Mobile Radio Corporation bought theirs for $89.9 million. Digital Satellite Broadcasting Corporation and Primosphere were unsuccessful in their bids for licenses.Sky Highway Radio Corporation had also expressed interest in creating a satellite radio network, before being bought out by CD Radio in 1993 for $2 million. In November 1999, Margolese changed the name of CD Radio to Sirius Satellite Radio. In November 2001, Margolese stepped down as CEO, remaining as chairman until November 2003, with Sirius issuing a statement thanking him "for his great vision, leadership and dedication in creating both Sirius and the satellite radio industry."
XM’s first satellite was launched on March 18, 2001 and its second on May 8, 2001.Its first broadcast occurred on September 25, 2001, nearly four months before Sirius. Sirius launched the initial phase of its service in four cities on February 14, 2002, expanding to the rest of the contiguous United States on July 1, 2002. The two companies spent over $3 billion combined to develop satellite radio technology, build and launch the satellites, and for various other business expenses. Stating that it was the only way satellite radio could survive, Sirius and XM announced their merger on February 19, 2007, becoming Sirius XM. The FCC approved the merger on July 25, 2008, concluding that it was not a monopoly, primarily due to Internet audio-streaming competition.
MobaHo! was a mobile satellite digital audio/video broadcasting service based in Japan which offered different services to Japan and the Republic of Korea and whose services began on October 20, 2004, and ended on March 31, 2009.
XM satellite radio was launched in Canada on November 29, 2005. Sirius followed two days later on December 1, 2005. Sirius Canada and XM Radio Canada announced their merger into Sirius XM Canada on November 24, 2010.It was approved by the Canadian Radio-television and Telecommunications Commission on April 12, 2011.
Satellite radio uses the 2.3 GHz S band in North America for nationwide digital radio broadcasting. MobaHO! operated at 2.6 GHz. In other parts of the world, satellite radio uses part of the 1.4 GHz L band allocated for DAB.
Satellite radio subscribers purchase a receiver and pay a monthly subscription fee to listen to programming. They can listen through built-in or portable receivers in automobiles; in the home and office with a portable or tabletop receiver equipped to connect the receiver to a stereo system; or on the Internet.
Ground stations transmit signals to the satellites which are 35,786 kilometers (22,236 miles) above the Equator in Clarke belt orbits. The satellites send the signals back down to radio receivers in cars and homes. This signal contains scrambled broadcasts, along with meta data about each specific broadcast. The signals are unscrambled by the radio receiver modules, which display the broadcast information. In urban areas, ground repeaters enable signals to be available even if the satellite signal is blocked. The technology allows for nationwide broadcasting, so that, for instance US listeners can hear the same stations anywhere in the country.
Satellite radio in the US offers commercial-free music stations, as well as news, sports, and talk, some of which include commercials.In 2004, satellite radio companies in the United States began providing background music to hotels, retail chains, restaurants, airlines and other businesses. On April 30, 2013, SiriusXM CEO Jim Meyer stated that the company would be pursuing opportunities over the next few years to provide in-car services through their existing satellites, including telematics (automated security and safety, such as stolen vehicle tracking and roadside assistance) and entertainment (such as weather and gas prices).
As of March 2013 [update] , SiriusXM had 24.4 million subscribers. This was primarily due to the company’s partnerships with automakers and car dealers. Roughly 60% of new cars sold come equipped with SiriusXM, and just under half of those units gain paid subscriptions. The company has long-term deals with General Motors, Ford, Toyota, Kia, Bentley, BMW, Volkswagen, Nissan, Hyundai and Mitsubishi. The presence of Howard Stern, whose show attracts over 12 million listeners per week, has also been a factor in the company’s steady growth. As of 2013 [update] , the main competition to satellite radio is streaming Internet services, such as Pandora and Spotify, as well as FM and AM Radio.
Satellite radio differs from AM, FM radio, and digital television radio (DTR) in the following ways (the table applies primarily to the United States):
|Radio format||Satellite radio||AM/FM||Digital television radio (DTR)|
|Monthly fees||US$10.99 and up||Free||Free for terrestrial. Very low for cable television or satellite—DTR represents a small portion of the total monthly television fee.|
|Portability||Available||Prominent||None—a typical set consists of a stereo attached to a television set-top box (the primary function of the set top-box is normally designed for viewing digital television on an analogue set).|
|Listening availability||Very high—a satellite signal's footprint covers millions of square kilometres.||Low to moderate[ citation needed ] — implementation of FM service requires moderate to high population densities and is thus not practical in rural and/or remote locales; AM travels great distances at night.||Very high|
|Sound quality||Varies||AM: Usually very low |
FM: Usually Moderate, but can be very high
|Variety and depth of programming||Highest||Variable—highly dependent upon economic/demographic factors||Variable—dependent on location and the television provider for cable and satellite, dependent on the various packages they provide and on the user's subscription.|
|Frequency of programming interruptions (by DJs or commercial advertising)||None to high—mostly dependent on the channels, some of which have DJs; most channels are advertisement-free because of the paid subscription model of satellite radio.||Highest||None to low—dependent on the provider; however, it is common that some stations will have DJs. Usually no advertisements on subscription services (DirecTV and Dish Network both claim to provide advertisement-free content).|
|Governmental regulation||Yes (minimal)||Yes—significant governmental regulations regarding content||Yes for terrestrial. For cable and satellite, low to none|
Digital Audio Broadcasting (DAB) is a digital radio standard for broadcasting digital audio radio services in many countries around the world but not in North America where HD Radio is the standard for digital radio.
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. Radio waves with frequencies above the UHF band fall into the super-high frequency (SHF) or microwave frequency range. Lower frequency signals fall into the VHF or lower bands. UHF radio waves propagate mainly by line of sight; they are blocked by hills and large buildings although the transmission through building walls is strong enough for indoor reception. They are used for television broadcasting, cell phones, satellite communication including GPS, personal radio services including Wi-Fi and Bluetooth, walkie-talkies, cordless phones, and numerous other applications.
XM Satellite Radio (XM) was one of the three satellite radio (SDARS) and online radio services in the United States and Canada, operated by Sirius XM Holdings. It provided pay-for-service radio, analog to cable television. Its service included 73 different music channels, 39 news, sports, talk and entertainment channels, 21 regional traffic and weather channels and 23 play-by-play sports channels. XM channels were identified by Arbitron with the label "XM".
Radio broadcasting is transmission of audio by radio waves intended to reach a wide audience. Stations can be linked in radio networks to broadcast a common radio format, either in broadcast syndication or simulcast or both. Signals can be either analog audio or digital audio. Television broadcasting also uses radio frequencies, but includes video signals.
In-band on-channel (IBOC) is a hybrid method of transmitting digital radio and analog radio broadcast signals simultaneously on the same frequency.
Low-power broadcasting is broadcasting by a broadcast station at a low electric power to a smaller service area than "full power" stations within the same region. It is often distinguished from "micropower broadcasting" and broadcast translators. LPAM, LPFM and LPTV are in various levels of use across the world, varying widely based on the laws and their enforcement.
Digital radio is the use of digital technology to transmit or receive across the radio spectrum. Digital transmission by radio waves includes digital broadcasting, and especially digital audio radio services.
Sirius Satellite Radio was a satellite radio (SDARS) and online radio service operating in North America, owned by Sirius XM Holdings.
1worldspace, known for most of its existence simply as WorldSpace, is a defunct satellite radio network that in its heyday provided service to over 170,000 subscribers in eastern, southern and northern Africa, the Middle East, and much of Asia with 96% coming from India. It was profitable in India, with 450,000 subscribers.
HD Radio (HDR) is a trademarked term for the in-band on-channel (IBOC) digital radio technology used by AM and FM radio stations mostly in the United States, Canada and Mexico to transmit audio and data by using a digital signal embedded "on-frequency" immediately above and below a station's standard analog signal, providing the means to listen to the same program in either HD or as a standard broadcast. The HD format also provides the means for a single radio station to simultaneously broadcast one or more different programs in addition to the program being transmitted on the radio station's analog channel. iBiquity developed HD Radio, which was acquired by DTS in September 2015 bringing the HD Radio technology under the same banner as DTS' eponymous theater surround sound systems. The HD Radio technology and trademarks were subsequently acquired by Xperi in 2016.
Radio broadcasting in the United States has been used since the early 1920s to distribute news and entertainment to a national audience. It was the first electronic "mass medium" technology, and its introduction, along with the subsequent development of sound movies, ended the print monopoly of mass media. During the Golden Age of Radio it had a major cultural and financial impact on the country. However, the rise of television broadcasting in the 1950s relegated radio to a secondary status, as much of its programming and audience shifted to the new "sight joined with sound" service.
FM broadcasting is a method of radio broadcasting using frequency modulation (FM). Invented in 1933 by American engineer Edwin Armstrong, wide-band FM is used worldwide to provide high fidelity sound over broadcast radio. FM broadcasting is capable of higher fidelity—that is, more accurate reproduction of the original program sound—than other broadcasting technologies, such as AM broadcasting or DAB radio. Therefore, FM is used for most broadcasts of music. FM radio stations use the very high frequency range of radio frequencies.
WCSP-FM, also known as C-SPAN Radio, is a radio station owned by the Cable-Satellite Public Affairs Network (C-SPAN) in Washington, D.C. The station is licensed to C-SPAN's corporate owner, the National Cable Satellite Corporation, and broadcasts on 90.1 MHz 24 hours a day. Its studios are located near Capitol Hill in C-SPAN’s headquarters. In addition to WCSP-FM, C-SPAN Radio programming is also available online at c-span.org and via satellite radio on SiriusXM channel 455.
Martine Aliana Rothblatt is an American lawyer, author, and entrepreneur. Rothblatt graduated from University of California, Los Angeles with J.D. and M.B.A. degrees in 1981, then began to work in Washington, D.C., first in the field of communications satellite law, and eventually in life sciences projects like the Human Genome Project.
SiriusXM is an American broadcasting company headquartered in Midtown Manhattan, New York City that provides satellite radio and online radio services operating in the United States. It was formed by the 2008 merger of Sirius Satellite Radio and XM Satellite Radio, merging them into SiriusXM Radio. The company also has a minor interest in Sirius XM Canada, an affiliate company that provides Sirius and XM service in Canada. At the end of 2013, Sirius XM reorganized their corporate structure, which made Sirius XM Radio Inc. a direct, wholly owned subsidiary of Sirius XM Holdings, Inc.
Primosphere Limited Partnership was one of four companies bidding for Satellite Digital Audio Radio Service, or SDARS, licenses in the United States. The service would have been an advertisement-supported digital audio service with an emphasis on serving music genres that had lost exposure in the terrestrial radio market during that period, such as classic jazz, "beautiful music," "pop standards," and swing music. Two dedicated public radio talk channels were also proposed along with traditional talk radio channels.
Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by a radio receiver connected to another antenna. Radio is very widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing and other applications.
Robert D. Briskman is Technical Executive of Sirius XM Radio.
Digital audio radio service (DARS) refers to any type of digital radio program service. In the United States it is the official FCC term for digital radio services.
David Margolese is an entrepreneur and a founder of Sirius XM Radio, serving as chairman and CEO from 1993 to 2002. Considered "one of the earliest advocates of pay radio," he "effectively created the industry."