The history of portable satellite radios is short compared to traditional over-the-air radio, but it has rapidly changed the face of radio listening like no other technology in recent memory. The two major satellite radio services, XM Satellite Radio and SIRIUS Satellite Radio, offer a stunning array of programming and compete fiercely for customers.

Their popularity has stunned many in the radio industry and with the advent of new, smaller, more convenient portable satellite radios, some industry veterans worry about the future viability of traditional broadcast radio.

How did satellite radio get started and what is its future? Let