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Satellite Operators Worldwide
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SIRIUS satellite Radio
Sirius Satellite Radio is one of two satellite radio (SDARS) services operating in the United States and Canda, along with XM Satellite Radio. Headquartered in New York City, with smaller studios in Los Angeles and Memphis, Sirius was officially launched on July 1, 2002.

Current Satellites
RadioSat-1, RadioSat-2, RadioSat-3
RadioSat-4 is stored as reserve satellite
Launch dates: 30.06.2000, 5.9.2000, 31.11.2000
Location : geosynchronous highly elliptical orbit at a permanent inclination of 63.4 degrees
Main contractor : Space Systems/Lora
Platform : LS 1300
Launch services : ILS
Launcher : Proton-K Blok-DM3
Launch site : Baikonour
Launch mass: 3800 kg

Technology
three satellites fly in geosynchronous highly elliptical orbit (Tundra orbit) in a 24-hour orbital period. Sirius claims the elliptical path of its satellite constellation ensures that each satellite spends about 16 hours a day over the continental United States, with at least one satellite over the country at all times. The orbit allows the satellites to broadcast from directly overhead the continental United States, avoiding the problem of large buildings or objects blocking the signal and requiring a much smaller terrestrial repeater network than does competitor XM.


Sirius FM-5
The first geostationary SIRIUS satellite, complementing the SIRIUS fleet of three non-geostationary satellites.
Launched : 30.6.2009
Location : 96 degrees west
Main contractor : Space Systems/Lora
Platform : LS 1300
Launch services : ILS
Launcher : Proton-K Blok-DM3
Launch site : Baikonour
Launch mass: 5820 kg
Transponders: 1 X/S-band transponder
Life expectancy : 15 years
History & Overview

Sirius was founded as Satellite CD Radio, Inc., which it was known by until the change to its current designation on November 18, 1999. The name is derived from Sirius, sometimes referred to as the Dog Star, the brightest star in the night-time sky, and was developed by the company's founder David Margolese, and its Marketing Chief Ira Bahr The dog in the Sirius logo is unofficially named "Mongo", a name garnered from the debut of Sirius Satellite Radio’s sponsorship on Casey Atwood’s and later Jimmy Spencer’s NASCAR entry, when the announcing cast voted on names. "Mongo" later became NASCAR driver Spencer’s nickname with the NASCAR Broadcasters (mainly Darrell Waltrip) in the following races.


XM - Sirius Merger
On July 25th 2008 the Federal regulators formally approved the merger of the nation's only two satellite radio operators Friday, ending a 16-month-long drama closely watched by Washington and Wall Street.

Sirius Satellite Radio Inc.'s $3.3 billion buyout of rival XM Satellite Radio Holdings Inc. will mean 18 million-plus subscribers will be able to receive programming from both services. Executives say it will mean huge cost savings that will lead to a first-ever profit for the relatively nascent industry.

The Federal Communications Commission voted 3-2 to approve the buyout, with the tie-breaking vote coming Friday night from Republican commissioner Deborah Taylor Tate.

Tate had insisted that the companies settle charges that they violated FCC rules before she would approve the deal. The companies agreed this week to pay $19.7 million to the U.S. Treasury for violations related to radio receivers and ground-based signal repeaters.

The new company. created after the merger is called Sirius XM.

Ground Control
The current, primary uplink facility for Sirius is located in Vernon, Sussex County, New Jersey. The original facility was located on the roof of the building housing the Sirius studios in Rockefeller Center in New York City but has since been decommissioned.

Studios
The main company's state of the art digital studios are located on 49th street in New York City
NYC studios

Sirius XM-5
The 2nd geostationary SIRIUS satellite, complementing the SIRIUS fleet of three non-geostationary satellites.
Launched : 2010
Location : 85 degrees west
Main contractor : Space Systems/Lora
Platform : LS 1300
Launch services : ILS
Launcher : Proton
Launch site : Baikonour
Launch mass: 6000kg
Transponders: 1 X/S-band transponder
Life expectancy : 15 years

 

Sirius Radiosat 1 launch poster click to enlarge


Sirius Radiosat 2 launch poster click to enlarge

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