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Three satellite systems that have gained wide spread
popularity are Inmarsat, Iridium and Globalstar. Although they are all
attempting to meet the same demand, they each go about this in different
ways. What follows is a basic overview of some of their strengths and
weaknesses.
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Inmarsat: The first mobile satellite
system to be conceived, is a great example of how the technology has
emerged from a niche market and been made available to all.
Originally designed for the maritime industry, they now have over
100,000 registered satellite phone terminals.
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Iridium: Probably the most famous, or
rather notorious, of the satellite systems on the market. They very
publicly went bankrupt in 1999; one year after the service was
launched. However, Motorola Inc. stepped in and settled their debts.
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Globalstar: They envisioned their
customers as people who were working on the fringes of cellular
networks, crossing in and out of coverage areas. Therefore they
designed a handset that would work on both the cellular AMPS and
CDMA networks and, the Globalstar network.
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