There are many different manufacturers that produces satellite radio systems. The two most popular are SiriusXM and JVC. By using a satellite radio system you get more channels to listen at.
Satellite radio becomes common more and more. The most popular satellite radio in the USA is for sure SiriusXM, since this company has a huge market share in car radios.
You can have "radio" without radio waves over the Internet. This is because popular culture has decided that live streaming audio over the Internet is most like listening to terrestrial or satellite broadcast radio.
Most new CD/MP3 players have options to have satellite radio available through them.
Installing a satellite radio system in a Kia Sephia shouldn't cost more than $50.00 at the most. Fortunately, satellite radio receivers are more than affordable today.
If you mean what it is used for, its most common uses are for weather forecasting, and communications, like satellite TV and radio.
Radio 1
The national network BBC Radio host many of the the UK'S most popular stations. However, the most popular shows vary by region. Chris Evans is the UK's most popular breakfast show.
There are many popular internet stations. One of the most popular is KISS fm which is stationed out of Los Angeles. BBC 1 radio is another popular choice.
Most times the satellite radio will use an anntena but if your car has a "AUX IN" or "LINE IN" you can purchase the Direct Wired Kit and use that to transfer the signal to your car.
Radio Disney is probably the most popular.
If you have the antena inside the car or drive behind a mountain.