Radiocommunication Services - ITU-R Allocations for Mobile-Satellite Services

Analysis of MSS allocations suggests they fall into seven groups which appear in the following table:

MSS Group

Description

ITU Allocations

Group I

Commercial Geo stationary Orbital (GSO) Satellites

Four allocations for downlinks and uplinks on a primary basis ranging from 1525-1544 MHz to 1646.5-1660.5 MHz.

14.0-14.5 GHz world-wide primary allocation for LMSS uplinks.

20.1-20.2 GHz and 29.9-30.0 GHz world-wide primary MSS allocations shared with FSS.

117.975-137.0 MHz world-wide secondary allocation

Group II

Government Networks

There are three sets of allocations (downlinks and uplinks) used for government (military) uses.

235.0-322.0 MHz and 335.4-399.9 MHz.

7250-7375 MHz and 7900-8025 MHz.

20.2-21.2 GHz and 30.0-31.0 GHz

Group III

Non-commercial GSO < 1 GHz

There are seven allocations for LMSS between 100 MHz and 1 GHz. These allocations are in highly congested spectrum.

Group IV

Non-GSO Major System Bands

11 bands for either uplinks or downlinks ranging from 1492-1525 MHz to 2655-2690 MHz.

One of the bands previously allocated was reallocated to IMT-2000 (2170-2200 MHz).

Group V

Millimeter-wave MSS Bands

Nine bands above 40 GHz which are lightly used.

Group VI

MSS Distress and Safety Bands

121.45-121.55 MHz, 242.95-243.05 MHz, 406.0-406.1 MHz,

and

Group VII

Feeder Links - The following FSS allocations are used worldwide on an exclusive basis for MSS feeder links.

5091-5150 MHz for non-GSO MSS: becomes a secondary allocation after 2010.

5150-5250 MHz for non-GSO MSS: a primary allocation.

6700-7075 MHz for non-GSO MSS: a primary allocation.

15.43-15.63 GHz for non-GSO MSS: a primary allocation

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