**United States of America**

**DRAFT PROPOSAL FOR THE WORK OF THE CONFERENCE**[^1]

**Agenda Item 1.31**: to consider the additional allocations to the
mobile-satellite service in the 1-3 GHz band, in accordance with
Resolutions **226 (WRC-2000)** and **227 (WRC-2000)**;

**Background Information**: WRC-2000 considered proposals for worldwide
allocation of the band 1 683-1 690 MHz to the mobile-satellite service
(MSS) (Earth-to-space) in response to Resolution **213 (WRC-95)**. The
frequency band 1 675-1 710 MHz is allocated to the MSS (Earth-to-space)
in Region 2 on a co-primary basis. However, the 1 683-1 690 MHz portion
is used mainly by the meteorological-satellite (MetSat) and
meteorological aids (MetAids) services. While there are only a limited
number of MetSat earth stations operating in this band in Region 1,
there are a large number of MetSat earth stations operating in Regions 2
and 3, and the locations of many of these stations are not identified.
Sharing between MetSat and MSS in the band 1 675-1 690 MHz is feasible
only if appropriate separation distances are maintained.

Sharing between MetSat and MSS may not be feasible in those countries
where a large number of MetSat stations are deployed. Recommendation
ITU-R **SA.1158-2** indicates that additional studies are required in
order to determine the criteria for coordination between MSS and the
MetSat service for GVAR/S-VISSR stations operated in the band
1 683-1 690 MHz in Regions 2 and 3.

Other spectrum identified in Resolution **213** included 1 690-1 710
MHz. However, the ITU-R has concluded that co-channel sharing between
MSS and MetAids is not feasible and that co-frequency sharing between
MetAids and MetSat services is not feasible. Therefore, the World
Meteorological Organization (WMO) has identified future spectrum
requirements for MetAids operations as limited to the 1 675-1 683 MHz
portion of the 1 675-1 700 MHz band, but some administrations will
continue to require spectrum in the range 1 683-1 690 MHz for MetAids
operations. Resolution **227** observed that no further study is
required on sharing in the 1 675-1 683 MHz and 1 690-1 710 MHz bands,
due to incompatibility between MSS and existing services in these bands.

The existing Region 2 allocation includes the provision that MSS
operation should not constrain current and future development of the
MetSat service, as specified in No. **5.377**. No MSS services have been
implemented under the Region 2 allocation in this band.

**Proposal**:

**USA/ /1 MOD**

1 675-1 710 MHz

+----------------------+----------------------+-----------------------+
| Allocation to        |                      |                       |
| services             |                      |                       |
+----------------------+----------------------+-----------------------+
| Region 1             | Region 2             | Region 3              |
+----------------------+----------------------+-----------------------+
| **1 675-1 690**      | **1 675-1 690**      | **1 675-1 690**       |
|                      |                      |                       |
| METEOROLOGICAL AIDS  | METEOROLOGICAL AIDS  | METEOROLOGICAL AIDS   |
|                      |                      |                       |
| FIXED                | FIXED                | FIXED                 |
|                      |                      |                       |
| METEOROLOGICAL-\     | METEOROLOGICAL-\     | METEOROLOGICAL-\      |
| SATELLITE            | SATELLITE            | SATELLITE             |
| (space-to-Earth)     | (space-to-Earth)     | (space-to-Earth)      |
|                      |                      |                       |
| MOBILE except        | MOBILE except        | MOBILE except         |
| aeronautical\        | aeronautical\        | aeronautical\         |
| mobile               | mobile               | mobile                |
+----------------------+----------------------+-----------------------+
| 5.341                | 5.341                | 5.341                 |
+----------------------+----------------------+-----------------------+
| **1 690-1 700**      | **1 690-1 700**      | **1 690-1 700**       |
|                      |                      |                       |
| METEOROLOGICAL AIDS  | METEOROLOGICAL AIDS  | METEOROLOGICAL AIDS   |
|                      |                      |                       |
| METEOROLOGICAL-\     | METEOROLOGICAL-\     | METEOROLOGICAL-\      |
| SATELLITE            | SATELLITE            | SATELLITE             |
| (space-to-Earth)     | (space-to-Earth)     | (space-to-Earth)      |
|                      |                      |                       |
| Fixed                |                      |                       |
|                      |                      |                       |
| Mobile except        |                      |                       |
| aeronautical mobile  |                      |                       |
+----------------------+----------------------+-----------------------+
| 5.289 5.341 5.382    | 5.289 5.341 5.381    | 5.289 5.341 5.381     |
+----------------------+----------------------+-----------------------+
| **1 700-1 710**      | **1 700-1 710**      | **1 700-1 710**       |
|                      |                      |                       |
| FIXED                | FIXED                | FIXED                 |
|                      |                      |                       |
| METE                 | METEOROLOGICAL-\     | METEOROLOGICAL-\      |
| OROLOGICAL-SATELLITE | SATELLITE            | SATELLITE             |
| (space-to-Earth)     | (space-to-Earth)     | (space-to-Earth)      |
|                      |                      |                       |
| MOBILE except        | MOBILE except        | MOBILE except         |
| aeronautical\        | aeronautical\        | aeronautical\         |
| mobile               | mobile               | mobile                |
+----------------------+----------------------+-----------------------+
| 5.289 5.341          | 5.289 5.341          | 5.289 5.341 5.384     |
+----------------------+----------------------+-----------------------+

**Reasons**: There are no MSS systems operating in this band, and none
are currently planned, due to the incompatibility of MSS and the Metaids
and MetSat services.

USA/ /2 SUP

**5.377**

**Reasons**: Consequential to the deletion of the allocation for MSS.

[^1]: This is a revised version of the original draft U.S. proposal on
    this agenda item. (06/26/02)