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Globalstar System Technology


 
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Globalstar System Technology

Globalstar System Works By Merging Communications Technologies
The Globalstar™ Communications System merges mobile cellular and satellite communications technologies and standards to provide a global roaming solution for cellular phone users. Inside any cellular service area, a subscriber may roam to other cellular networks or switch to the Globalstar network.
The Globalstar System Consists Of...

* A satellite constellation of 48 low-Earth-orbiting (LEO) satellites in a 1414 kilometer orbit (878 miles) above the Earth;

* Multiple ground stations called "Gateways";

* The phones that communicate with the satellite (when in Globalstar mode).
QUALCOMM's Role: How It Ties Together  
Globalstar's constellation transmits calls from your mobile or fixed satellite phone to a terrestrial Gateway developed by QUALCOMM and owned and operated by the Service Provider. These calls are passed through the Gateway and on to existing fixed and cellular telephone networks in more than 100 countries on 6 continents.
Terrestrial Gateways are an important part of Globalstar's strategy to keep key technology and equipment easily accessible & to integrate services as closely as possible with existing local telephony networks. This makes the Globalstar Communications System and its services simple to manage.
QUALCOMM, as designer and leader in the standardization and commercialization of CDMA technology for wireless applications, supplies Globalstar L.P. and Service Providers with:
* QUALCOMM Globalstar Satellite Phones and Products
* QUALCOMM Globalstar Gateways
"Seamless" Phone Service Coverage Is Desired
Cellular phone coverage is provided by a network of transceiver antennas clustered on transceiver towers. A network of circles is represented by hexagons. This shows the optimal placement of towers to eliminate "holes" in coverage (an area where mobile phone communication cannot be achieved).
In the real world, coverage holes occur. Obstacles like hills, valleys, or man-made obstructions make the strength of signals between the phone and the cellular antennas inadequate. Mobile phone calls cannot be made or continued when the caller is in one of these holes.
 
Globalstar Covers The World*  
Most of the world is NOT covered by cellular networks, whether in wilderness areas, on long-haul trucking routes, or in developing nations.
A satellite phone system gives the consumer a single phone that can be used almost anywhere, whether next door or half-way around the world.
 
* Except for polar regions or areas not currently covered by installed Gateways, including most of Greenland, small parts of Alaska, Canada, Scandinavia, Siberia, and regions in the Southern Hemisphere, including Antarctica & parts of South America.
 
  
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