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Inmarsat
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The Inmarsat system uses 1525-1559 MHz for the downlink, and 1626.5-1660.5 MHz for the uplink (2x34 MHz). The sub-band 1544-1545/1645.5-1646.5 MHz is reserved for safety & distress communications.
Inmarsat consists of three satellites in geostationary orbit that provide coverage over most of the Earth, excluding the polar regions. Inmarsat is used for a wide variety of purposes, including voice and data services to ships, in-flight telephone service to airplanes when over the oceans, and voice/data services through the "Broadband Global Access Network" (BGAN), using laptop-sized satellite terminals.
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Paired Frequency Bands |
| Paired Bands | Use | Service | Table |
| 1525 - 1559 MHz | Inmarsat downlink | Mobile-satellite | - |
| 1626.5 - 1660.5 MHz | Inmarsat uplink | Mobile-satellite (Earth-to-space) | - |
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