United States of America

DRAFT PROPOSAL FOR THE WORK OF THE CONFERENCE

## WRC-03 Agenda Item 1.12a: to consider allocations and regulatory issues related to the space science services in accordance with Resolution 723 (Rev. WRC-2000);

Background Information: ITU-R Recommendation SA.363-5 recommends that
frequencies below 1 GHz are technically suitable for telecommand of
satellites in the space science services operating below an altitude of
2000 km. A deficiency in telecommand (uplink) frequency allocations has
been previously identified, compared to the available telemetry
(downlink) allocations in the 100 MHz to 1 GHz range. The deficiency was
first noted in Resolution 712 (WARC-92), repeated in Resolution 712
(Rev. WRC-95), and again in Resolution 723 (WRC-97).

This item was originally placed on the WRC-97 agenda. WRC-97 determined
that insufficient study had been completed to take action on this agenda
item.

Since WRC-2000, additional studies have been undertaken in the ITU-R.
The study results show that show that separation distances for
aeronautical mobile stations must be over 400 km and for MSS
approximately 100 km. These required coordination distances make use of
RR 9.17/17a and Appendix 7 impractical and will result in large
geographical regions where existing Aeronautical Mobile, MS, FS, and MSS
services are unusable.

Proposal:

USA/ /1 [NOC]{.underline}

+-----------------------+-----------------------+-----------------------+
| Allocation to         |                       |                       |
| services              |                       |                       |
+-----------------------+-----------------------+-----------------------+
| Region 1              | Region 2              | Region 3              |
+-----------------------+-----------------------+-----------------------+
|                       | **220-225**           |                       |
+-----------------------+-----------------------+-----------------------+
| **223-230**           | AMATEUR               | **223-230**           |
|                       |                       |                       |
| BROADCASTING          | FIXED                 | FIXED                 |
|                       |                       |                       |
| Fixed                 | MOBILE                | MOBILE                |
|                       |                       |                       |
| Mobile                | Radiolocation 5.241   | BROADCASTING          |
+-----------------------+-----------------------+-----------------------+
|                       | **225-235**           | AERONAUTICAL\         |
|                       |                       | RADIONAVIGATION       |
|                       | FIXED                 |                       |
|                       |                       | Radiolocation         |
|                       | MOBILE                |                       |
+-----------------------+-----------------------+-----------------------+
| 5.243 5.246 5.247     |                       | 5.250                 |
+-----------------------+-----------------------+-----------------------+
| **230-235**           |                       | **230-235**           |
|                       |                       |                       |
| FIXED                 |                       | FIXED                 |
|                       |                       |                       |
| MOBILE                |                       | MOBILE                |
|                       |                       |                       |
|                       |                       | AERONAUTICAL\         |
|                       |                       | RADIONAVIGATION       |
+-----------------------+-----------------------+-----------------------+
| 5.247 5.251 5.252     |                       | 5.250                 |
+-----------------------+-----------------------+-----------------------+
| **235-267** FIXED     |                       |                       |
|                       |                       |                       |
| MOBILE                |                       |                       |
|                       |                       |                       |
| 5.111 5.199 5.252     |                       |                       |
| 5.254 5.256           |                       |                       |
+-----------------------+-----------------------+-----------------------+
| **267-272** FIXED     |                       |                       |
|                       |                       |                       |
| MOBILE                |                       |                       |
|                       |                       |                       |
| Space operation       |                       |                       |
| (space-to-Earth)      |                       |                       |
|                       |                       |                       |
| 5.254 5.257           |                       |                       |
+-----------------------+-----------------------+-----------------------+
| **272-273** SPACE     |                       |                       |
| OPERATION             |                       |                       |
| (space-to-Earth)      |                       |                       |
|                       |                       |                       |
| FIXED                 |                       |                       |
|                       |                       |                       |
| MOBILE                |                       |                       |
|                       |                       |                       |
| 5.254                 |                       |                       |
+-----------------------+-----------------------+-----------------------+
| **273-312** FIXED     |                       |                       |
|                       |                       |                       |
| MOBILE                |                       |                       |
|                       |                       |                       |
| 5.254                 |                       |                       |
+-----------------------+-----------------------+-----------------------+
| **312-315** FIXED     |                       |                       |
|                       |                       |                       |
| MOBILE                |                       |                       |
|                       |                       |                       |
| Mobile-satellite      |                       |                       |
| (Earth-to-space)      |                       |                       |
| 5.254 5.255           |                       |                       |
+-----------------------+-----------------------+-----------------------+
| **315-322** FIXED     |                       |                       |
|                       |                       |                       |
| MOBILE                |                       |                       |
|                       |                       |                       |
| 5.254                 |                       |                       |
+-----------------------+-----------------------+-----------------------+
| **322-328.6** FIXED   |                       |                       |
|                       |                       |                       |
| MOBILE                |                       |                       |
|                       |                       |                       |
| RADIO ASTRONOMY       |                       |                       |
|                       |                       |                       |
| 5.149                 |                       |                       |
+-----------------------+-----------------------+-----------------------+
| **328.6-335.4**       |                       |                       |
| AERONAUTICAL          |                       |                       |
| RADIONAVIGATION       |                       |                       |
|                       |                       |                       |
| 5.258 5.259           |                       |                       |
+-----------------------+-----------------------+-----------------------+
| **335.4-387** FIXED   |                       |                       |
|                       |                       |                       |
| MOBILE                |                       |                       |
|                       |                       |                       |
| 5.254                 |                       |                       |
+-----------------------+-----------------------+-----------------------+
| **387-390** FIXED     |                       |                       |
|                       |                       |                       |
| MOBILE                |                       |                       |
|                       |                       |                       |
| Mobile-satellite      |                       |                       |
| (space-to-Earth)      |                       |                       |
| 5.208A 5.254 5.255    |                       |                       |
+-----------------------+-----------------------+-----------------------+
| **390-399.9** FIXED   |                       |                       |
|                       |                       |                       |
| MOBILE                |                       |                       |
|                       |                       |                       |
| 5.254                 |                       |                       |
+-----------------------+-----------------------+-----------------------+
| **399.9-400.05**      |                       |                       |
| MOBILE-SATELLITE      |                       |                       |
| (Earth-to-space)      |                       |                       |
| 5.209 5.224A          |                       |                       |
|                       |                       |                       |
| RADI                  |                       |                       |
| ONAVIGATION-SATELLITE |                       |                       |
| 5.222 5.224B 5.260    |                       |                       |
|                       |                       |                       |
| 5.220                 |                       |                       |
+-----------------------+-----------------------+-----------------------+

**Reasons**: ITU-R studies have shown that sharing between telecommand
and existing services in the 225 -- 400 MHz band results in impractical
coordination requirements with existing services.