To: Marty Rubin who wrote (1873 ) 6/21/1999 12:21:00 AM From: Marty Rubin Respond to of 2693
THE IRIDIUM INNOVATION --A Word from our [National Geographic] Sponsor [*05 Feb 99 ] At about 40 pounds (18 kilograms), a previous-generation satellite phone was as big as a carry-on suitcase full of unmarked bills—and just as likely to attract the attention of a jungle smuggler. And to set it up you simply had to unfurl an umbrella-size dish and point it toward the nearest compatible satellite. Now all you have to do is press TALK and wait for the tone—if you've got an Iridium phone. So how does it work? The Iridium phone works in two modes. As a mobile cellular phone it seeks out available service for existing land-based networks. When you turn on your Iridium phone with the World Roaming Service, you're automatically registered with a participating local cellular network. You'll have one telephone number and one telephone bill. Translation: Iridium phones work anywhere cellular service is available. But what if your location is decidedly noncellular—as in the heart of the Amazon rain forest? Simply switch the Iridium phone to satellite mode. Iridium World Satellite service gives you a direct satellite link for both incoming and outgoing communications. The call is then relayed from [** ] satellite 08>> to satellite until it reaches its destination: either a local [** ] Iridium gateway 03>>, which connects to the public switched telephone network, or directly to a receiving Iridium phone. Translation: Iridium phones work anywhere. Period. How can Iridium provide direct satellite service in a handheld phone? It's all thanks to LEO, Iridium's Low Earth Orbit constellation of satellites. Other satellite phone systems employ a few satellites floating deep in space. For example, the satellites used by one previous-generation satellite phone are some 22,000 miles [36,000 kilometers] away—which explains the umbrella-size antenna. But with Iridium's 66 satellites orbiting a scant 500 miles (800 kilometers) above sea level, all you need is an Iridium phone. Want to know more? Visit [http://www.iridium.com/ ]. (http://www.nationalgeographic.com/voices/technology.html) ----------------------------------------------------------------- All,* Link to Date: infoseek.nationalgeographic.com ** Please visit original (NG's) site to access the two satellite pictures, "satellite 08>>" and "Iridium gateway 03>>," respectfully. The article is pretty old; Hope you enjoy it anyway. lots of things have changed. Marty -)