***RCS WRC --07 Agenda Item Scope and High-Level Work Plan***[^1]

**Agenda Item 1.17**: to consider the results of ITU-R studies on
compatibility between the fixed-satellite service and other services
around 1.4 GHz, in accordance with Resolution **745** **(WRC 03)**;

**Short Description**: Resolution **745 (WRC-03)**, deals with the
protection of existing services in all Regions from
non-geostationary-satellite feederlinks for mobile-satellite service
links below 1 GHz operating in the fixed-satellite service and using the
frequency bands around 1.4 GHz on a secondary basis.

**Background**: At WRC-03, Committee 5 dealt with the very controversial
issue of making allocations near 1.4 GHz for NGSO MSS feederlinks
operating in the fixed-satellite service. The Conference decided to make
these 2 MHz wide Earth-to-space and space-to-Earth allocations on a
secondary basis, and subject to Resolution **745**. This Resolution was
part of a delicate compromise and calls for a number of compatibility
studies and measurements to ensure that existing services in the
allocated bands, as well as the passive services in the 1400 -- 1427 MHz
passive band, are protected from harmful interference. Resolution
**745** resolves:

1.  that the additional allocations for the FSS on a secondary basis in
    the bands 1 390-1 392 MHz and 1 430-1 432 MHz for feeder links in
    the (Earth-to space) and (space-to-Earth) directions, respectively,
    for non GSO satellite systems in the MSS with service links
    operating below 1 GHz, shall not be used until the completion of ITU
    R studies on all identified compatibility issues as shown in Annex 1
    to this Resolution and the results of these studies shall be
    reported to WRC 07 and the decisions should be taken by WRC 07
    accordingly;

2.  to recommend that decisions taken by WRC 07, including any
    provisions for the protection of other services to which the bands
    in resolves 1 are allocated, and of passive services in the adjacent
    band, apply to all non GSO FSS systems in these bands filed to the
    Bureau after 5 July 2003.

While a similar subject this agenda item will be kept separate from the
discussions under agenda item 1.20.

**Countries with Particular Interest**

At WRC-03, Lebanon, Papua New Guinea, Indonesia, some African nations
supported this allocations and France, Netherlands, Germany amongst
others opposed it.

**Scope of Agenda Item**: First the technical and operational
limitations on the MSS feederlinks that would protect existing in-band
allocated services in the 1390-1392 MHz band and the 1430-1432 MHz band
need to be determined. Similarly, the technical and operational
limitations on the MSS feederlinks that are necessary to protect the EES
(passive) and radio astronomy services from harmful out-of-band
emissions need to be determined. Finally, from a regulatory standpoint,
the means of including these technical and/or operational limitations in
the radio regulations must be determined.

This issue is controversial because only one United States commercial
entity is the proponent of these allocations and several Federal
Agencies may be negatively impacted by the use of these allocations
without sufficient technical and regulatory protections in place. NASA,
NSF and DoD are the affected government agencies. The vast majority of
Administrations at WRC-03 opposed this allocation. Notable supporters
were Papua New Guinea, Lebanon, and some African countries.

**Key technical/regulatory issues to be resolved**: All of the technical
issues contained in Resolution **745** must be resolved before the
United States can consider a proposal to WRC-07 on this issue. The
domestic allocation issue also needs to be resolved (see below).

**Key policy issues to be resolved**: Domestically, the United States
has already made "PRIMARY" allocations in the bands 1390-1392 MHz and
1430-1432 MHz and footnote **US 368** applies. This footnote essentially
made these allocations conditional on the WRC-03 making worldwide
allocations. Some Federal Agencies are of the opinion that the
allocations made at WRC-03 were conditional in and of themselves and
therefore do NOT meet the conditions in **US 368** at this time. In
other words, the domestic allocations should still be conditional on
WRC-07 reviewing the allocations made at WRC-03 and the results of
studies called for in Resolution **745** and the Conference making a
final determination on the WRC-03 allocations. Additionally, in the
event that the resolution of the technical issues to protect existing
services would require different limitations than are in place in US
368, such constraints would also be of issue to the FCC.

**Work Plan** **and Organization Participation**:

Work to be completed in support of this agenda item is as follows:

1.  conduct studies, and carry out tests and demonstrations to validate
    these studies on operational and technical means to facilitate
    sharing around 1.4 GHz, including the frequency band 1 390-1 392 MHz
    and the frequency band 1 430-1 432 MHz, between existing and
    currently planned services and FSS feeder links (Earth-to-space) and
    (space-to-Earth) for use by non GSO satellite systems in the MSS
    with service links operating below 1 GHz;

2.  conduct studies, including the measurement of emissions from
    equipment that would be employed in operational systems, to validate
    that the systems meet all requirements for the protection of passive
    services in the band 1 400-1 427 MHz from unwanted emissions from
    FSS feeder links around 1.4 GHz for non GSO satellite systems in the
    MSS with service links operating below 1 GHz;

3.  determine the power flux-density (pfd) values required to protect
    sensors of the EESS (passive) operating in the band 1 400-1 427 MHz.

The Responsible Group for this agenda item is WP 8D while WP 7C, WP 7D
and WP 4A are Contributing Groups. Study Group 6 is an Interested Group.
Government representatives will contribute in the following areas:

1.  Radiolocation and DoD-related issues: Mark Lewellen (SFA for DoD)

2.  EESS (passive): John Zuzek (NASA)

3.  Radio astronomy: Tom Gergely (NSF)

4.  CITEL: Glenn Feldhake (NASA), Tom Gergely (NSF)

**Reference Material**:

1.  ITU-R Recommendations SA.1029-2, RA.769-2

2.  WRC Resolution **745**

Compatibility issues

Earth-to-space

  -------------------- ---------------------- ------------- --------------
  Service              Parameter of concern   1 350-1 400   1 400-1 427
                                              MHz           MHz

  Fixed service                               Note 1        Note 2

  Mobile service                              Note 1        Note 2

  Radiolocation        pfd limits             Note 1        Note 2

  EESS (passive)       e.i.r.p. limits        Note 1        Note 2
  (secondary) (No.                                          
  **5.339**)                                                

  Radio astronomy      pfd limits, separation Note 1        Note 1
                       distances                            

  EESS (passive)       unwanted emission      Note 2        Note 1
                       limits;\                             
                       limited filter                       
                       rejection                            

  Space research       pfd limits             Note 2        No issue
  (passive)                                                 
  -------------------- ---------------------- ------------- --------------

space-to-Earth

+--------------+---------------------+----------+----------+----------+
| Service      | Parameter of        | 1 350-1  | 1 400-1  | 1 429-1  |
|              | concern             |  400 MHz |  427 MHz |  452 MHz |
+--------------+---------------------+----------+----------+----------+
| Fixed        | pfd limits          | Note 1   | Note 2   | Note 1   |
| service      |                     |          |          |          |
+--------------+---------------------+----------+----------+----------+
| Mobile       | pfd limits; FSS     | Note 1   | Note 2   | Note 1   |
| service      | shall not cause\    |          |          |          |
|              | harmful             |          |          |          |
|              | interference        |          |          |          |
+--------------+---------------------+----------+----------+----------+
| A            | pfd limits          | Note 2   | Note 2   | Note 1   |
| eronautical\ |                     |          |          |          |
| mobile (AMT) |                     |          |          |          |
+--------------+---------------------+----------+----------+----------+
| Radio        | epfd limits; issue  | Notes 1  | Note 1   | Note 2   |
| astronomy    | % of time           | and 2    |          |          |
+--------------+---------------------+----------+----------+----------+
| EESS         | unwanted emission   | Note 2   | Note 1   | Note 2   |
| (passive)    | limits;\            |          |          |          |
|              | limited filter      |          |          |          |
|              | rejection           |          |          |          |
+--------------+---------------------+----------+----------+----------+
| Space        | pfd limits          | Note 2   | Note 1   | Note 2   |
| research     |                     |          |          |          |
| (passive)    |                     |          |          |          |
+--------------+---------------------+----------+----------+----------+
| NOTE 1 --    |                     |          |          |          |
| study        |                     |          |          |          |
| considered   |                     |          |          |          |
| in this      |                     |          |          |          |
| Resolution   |                     |          |          |          |
|              |                     |          |          |          |
| NOTE 2 -- no |                     |          |          |          |
| allocation   |                     |          |          |          |
| (for radio   |                     |          |          |          |
| astronomy:   |                     |          |          |          |
| N            |                     |          |          |          |
| o. **5.149** |                     |          |          |          |
| applies to   |                     |          |          |          |
| the band 1   |                     |          |          |          |
| 350-1 400    |                     |          |          |          |
| MHz)         |                     |          |          |          |
+--------------+---------------------+----------+----------+----------+

[^1]: **Author**: John Zuzek **Document Date**: Rev. December 9, 2003