| Feature |
Globalstar |
Iridium |
Inmarsat |
Thuraya |
| Coverage |
N & S America,
Europe, Russia
China, Australia N Africa
|
100% global |
98% global -
70°N to 70°S (no polar) |
Europe Russia
India Africa |
| Satellite |
Low-earth orbit (no time delay) |
Low-earth orbit (no time delay) |
Low-earth orbit (no time delay) |
Geosynchronous
(time delay) |
| Data Speed |
9.6 Kbps |
2.4 Kbps |
2.4 Kbps; 64 Kbps with terminal |
9.6 Kbps; 144 Kbps with terminal |
| Fax |
no |
no |
yes |
no |
| SMS |
yes |
yes |
no |
yes |
| Rain-proof |
no |
no |
yes |
no |