satellite radio service

A radio service sent via satellite to cars, homes and public locations for subscribers who have special radios that can receive the signal. This allows the listener to follow a single channel no matter where they are because the signal's reach is not limited by station power and curvature of the Earth.
There are two satellite radio services in the US - Sirius and XM. Each transmits more than 100 channels of radio, most of which are commercial free. Subscribers pay a monthly fee to receive the service

We all have our favorite radio stations that we preset into our car radios, flipping between them as we drive to and from work, on errands and around town. But when you travel too far away from the source station, the signal breaks up and fades into static. Most radio signals can only travel about 30 or 40 miles from their source. On long trips that find you passing through different cities, you might have to change radio stations every hour or so as the signals fade in and out. And it's not much fun scanning through static trying to find something -- anything -- to listen to.

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.