Satellite communication networks can be an integral part of the newly emerging national and global information infrastructures (NII and GII).
Satellite communication offers a number of advantages over traditional terrestrial point-to-point networks. Satellite networks can cover wide geographic areas and can interconnect remote terrestrial networks ("islands")... displayed 300 characters
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In case of damaged terrestrial networks, satellite links provide an alternative. Satellites have a natural broadcast capability and thus facilitate multicast communication. Finally, satellite links can provide bandwidth on demand by using Demand Assignment Multiple Access (DAMA) techniques.
The growing congestion of the C and Ku bands have increased the interest of satellite system developers in the Ka-band... displayed next 300 characters
In 2006 Sirius signed a 500,000,000 dollar contract with radio disc jockey howard stern, which created a surge in subscriptions. When stern joined Sirius they had 300,000 subscribers, after two years they had over 8 million...
Most music stations are commercial free, where as the talk stations do advertise, quite a bit. Car manufacturers have been installing satellite radio receivers in some models for a few years now, and several models of portable satellite radio receivers are available from a variety of electronics companies...
is headquartered in Washington, DC. and is a wholly owned subsidiary of XM Satellite Radio Holdings Inc., which is publicly traded on NASDAQ. XM is one of two FCC licensees to deliver satellite radio programming...
A monthly fee is charged for both services (as of 2005 Sirius also offers a one time fee of nearly $500 valid for the lifetime of the equipment). Originally some XM music channels had commercials, while Sirius was commercial-free...
Compared with other competitors, XM have got strength
the technology and the potential alliance. XM have already set up a partnership with
WorldSpace which can provide with needed technical support on design and development
of the service...
Many of the channels have no commercials, with none of the channels having more than seven minutes of ads per hour. XM's content providers include USA Today, BBC, CNN, Sports Illustrated and The Weather Channel...
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