Donald Abelson

# Chief of the International Bureau

Federal Communications Commission

445 12th Street SW

# Washington, D.C. 20554

Dear Mr. Abelson:

The National Telecommunications and Information Administration on behalf
of the Executive Branch Agencies, has approved the release of an
additional Draft Executive Branch (NTIA) proposal considering federal
agency inputs toward the development of U.S. Proposals for WRC-03.

The attached proposal addresses agenda item 1.31, which is concerned
with additional allocations for mobile-satellite service in the 1.3 GHz
band. This proposal is forwarded for review by your WRC-03 Advisory
Committee. Karl Nebbia from my staff will contact Julie Garcia and
reconcile any differences.

> Sincerely,
>
> *(Signed October 23, 2001)*
>
> William T. Hatch

#### Associate Administrator

> Office of Spectrum Management

Enclosure

### 

###  {#section-1 .unnumbered}

**United States of America**

##### DRAFT PROPOSALS FOR THE WORK OF THE CONFERENCE

# **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**: WRC-2000 considered proposals for an allocation to the
mobile-satellite service (MSS) (space-to-Earth) in Regions 1 and 3 in
the frequency band 1 518-1 525 MHz. This band is adjacent to the
1 525-1 559 MHz band in use by GSO MSS operators. An earlier proposal,
using the 1 559-1 567 MHz band considered in response to Resolution
**220 (WRC-97)**, was dismissed by WRC-2000 and this band will not be
considered further for MSS use.

WRC-2000 concluded in Resolution **226** that the proposed allocation to
the MSS (space-to-Earth) at 1 518-1 525 MHz due to their potentially
widespread emissions upon the Earth from either geostationary or
non-geostationary systems, could have an impact on the terrestrial
mobile service, including aeronautical mobile and aeronautical mobile
telemetry, in all three Regions. Resolution **226** also states there is
a need to review the pfd values in Appendix **S5** in order to ensure
that they are adequate to protect new point-to-multipoint systems
operating in the fixed service in the band, as well as, a need to study
sharing between the MSS and aeronautical mobile telemetry in all the
Regions in the band.

Recommendation ITU-R M.1459 gives the values needed for protection of
the aeronautical mobile service for telemetry systems in the
1 452-1 525 MHz band from geostationary satellites operating in the MSS.
The required separation distances between co-frequency telemetry and MSS
operations are very large, making the feasibility use of the 1 518-1 525
MHz band by MSS anywhere in the world questionable.

There has been no MSS implemented in the 1 492-1 525 MHz band due to the
incompatibility between aeronautical telemetry and MSS systems.

WRC-2000 also considered proposals for worldwide allocation of the band
1 683-1 690 MHz to the 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 is mainly used by the meteorological-satellite (MetSat)
and meteorological aids (MetAids) services. While there are only a
limited number of main MetSat earth stations operating in this band in
all three Regions, there are a large number of MetSat earth stations
operating in Regions 2 and 3, and the locations of many of these
stations are unknown. 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, it has been concluded in the ITU-R 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 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.

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. **S5.377**. No MSS services have
been implemented under the Region 2 allocation in this band.

**Proposal:**

**USA/ /**

**MOD**

# 

1 492-1 525 MHz

+-----------------------+-----------------------+-----------------------+
| Allocation to         |                       |                       |
| services              |                       |                       |
+-----------------------+-----------------------+-----------------------+
| Region 1              | Region 2              | Region 3              |
+-----------------------+-----------------------+-----------------------+
| **1 492-1 525**       | **1 492-1 525**       | **1 492-1 525**       |
|                       |                       |                       |
| FIXED                 | FIXED                 | FIXED                 |
|                       |                       |                       |
| MOBILE except         | MOBILE S5.343         | MOBILE                |
| aeronautical mobile   |                       |                       |
|                       | ~~MOBILE-SATELLITE~~\ |                       |
|                       | ~~(space-to-Earth)    |                       |
|                       | S5.348A~~             |                       |
+-----------------------+-----------------------+-----------------------+
| S5.341 S5.342         | S5.341 S5.344         | S5.341 ~~S5.348A~~    |
+-----------------------+-----------------------+-----------------------+

**USA/ /**

# SUP

**Reasons:** There are no requirements for MSS systems in Region 2.

**USA/ /**

# SUP

**Reasons:** There are no MSS systems operating in this band, none are
currently planned. This allocation has not proven to be useful since it
was established in 1992. Also, there are no demonstrated spectrum
requirements for MSS systems, which necessitate the continuance of an
MSS allocation to Region 2 in this band.

**USA/ /**

# 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                |
|                      |                      |                       |
|                      | ~~MOBILE-SATELLITE\  |                       |
|                      | (Earth-to-space)~~   |                       |
+----------------------+----------------------+-----------------------+
| S5.341               | S5.341 ~~S5.377~~    | S5.341                |
+----------------------+----------------------+-----------------------+
| **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-SATELLITE\  |                       |
|                      | (Earth-to-space)~~   |                       |
| Mobile except        |                      |                       |
| aeronautical mobile  |                      |                       |
+----------------------+----------------------+-----------------------+
| S5.289 S5.341 S5.382 | S5.289 S5.341        | S5.289 S5.341 S5.381  |
|                      | ~~S5.377~~ S5.381    |                       |
+----------------------+----------------------+-----------------------+
| **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                |
|                      |                      |                       |
|                      | ~~MOBILE-SATELLITE\  |                       |
|                      | (Earth-to-space)~~   |                       |
+----------------------+----------------------+-----------------------+
| S5.289 S5.341        | S5.289 S5.341        | S5.289 S5.341 S5.384  |
|                      | ~~S5.377~~           |                       |
+----------------------+----------------------+-----------------------+

**USA/ /**

# SUP

**Reasons:** There are no MSS systems operating in this band, none are
currently planned. This allocation has not proven to be useful since it
was established in 1992. Also, there are no demonstrated spectrum
requirements for MSS systems, which necessitate the continuance of an
MSS allocation to Region 2 in this band.

### Appendix S5

**ANNEX 1**

**USA/ /**

# MOD

**TABLE S5-2**

**Reasons:** Consequential changes due to the deletion of the MSS
service from the band 1 492- 1 525 MHz.