Quick Answer
Iridium and Globalstar are two satellite phone networks that provide coverage in remote areas. While both networks offer global coverage, they differ in their satellite constellation design, resulting in varying levels of coverage in different regions.
Iridium Satellite Network Coverage
Iridium’s 66 Low Earth Orbit (LEO) satellites provide global coverage, with a focus on polar regions. This results in excellent coverage in the Arctic and Antarctic, as well as in remote areas near the equator. Iridium’s network offers 100% coverage over the world’s oceans, with voice and data services available as far as 82° latitude north and south.
Globalstar Satellite Network Coverage
Globalstar’s 48 LEO satellites, on the other hand, offer coverage in the Northern Hemisphere, with limited coverage in the Southern Hemisphere. Globalstar’s network provides 100% coverage over North America, Europe, and parts of South America, but offers limited services in the Antarctic and surrounding oceans. In contrast to Iridium, Globalstar’s satellites have a higher inclination (52°) which reduces coverage near the equator.
Choosing the Right Network
When selecting a satellite phone network, consider the specific region you will be operating in. If you need coverage in the Arctic or Antarctic, Iridium is the better choice. However, if you are primarily operating in the Northern Hemisphere, Globalstar may be sufficient. Keep in mind that Iridium’s network is often more expensive than Globalstar’s, but offers greater coverage in polar regions.
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