**Work Plan for Agenda Item 1.2**[^1]

**Agenda Item 1.2**: to consider allocations and regulatory issues
related to the Earth exploration-satellite (passive) service, space
research (passive) service and the meteorological satellite service in
accordance with Resolutions **746**  **(WRC‑03)** and **742**
**(WRC‑03);**

**Short Description**: Resolution **746** **(WRC-03),** "Issues dealing
with allocations to science services", contains the following two
issues:

1.  possible additional 100 MHz for geostationary meteorological
    satellites operating in the space-to-Earth direction extending the
    current 18.1-18.3 GHz geostationary meteorological satellites
    allocation to 300 MHz of contiguous spectrum;

2.  consideration of the sharing conditions between the EESS (passive)
    and the SRS (passive) on one hand and the fixed and mobile services
    on the other hand in the band 10.6-10.68 GHz to determine
    appropriate sharing criteria and to consider the inclusion of such
    sharing criteria within the Radio Regulations.

and Resolution **742** **(WRC-03)**, "Use of the frequency band 36-37
GHz" deals with

3.  consideration of sharing criteria between the passive services and
    the fixed and mobile services in the band 36-37 GHz to determine
    appropriate sharing criteria and to consider the inclusion of such
    sharing criteria within the Radio Regulations.

**Status:**

**Background**: Three separate proposed future WRC agenda items were
rolled into this agenda item. CEPT and APT both supported items
considering sharing between passive sensors and active terrestrial
services in the bands 10.6-10.68 GHz and 36-37 GHz. Japan also put in
separate proposals on these items. CEPT proposed the item on the
expansion of the MetSat allocation in the 18.1-18.3 GHz band. WRC-03
Committee 5 dealt with Agenda Item 1.12 that considered, amongst other
items, the EESS (passive) and SRS (passive) allocations in the band
36-37 GHz. Since no definitive result on the sharing studies was
possible during the 2000-2003 study cycle, CEPT and APT both proposed
Resolutions for further study with possible regulatory action after
studies were completed. This Resolution provided the genesis of
Resolution **742**.

While the U.S. did not propose any of the above three items, the U.S.
supported the creation of Resolution **742** on the 36-37 GHz band and
supported the possibility of an extension to the MetSat allocation in
the 18.1-18.3 GHz band. It is likely that APT and CEPT will support some
sort of regulatory action as a result of sharing studies in the 36-37
GHz band and possibly the 10.6-10.68 GHz band. It is likely that CEPT
and APT will support the extension of the MetSat allocation as this is
also supported by the WMO.

**Countries with a particular interest:**

**Scope of Agenda Item**: The MetSat extension of 100 MHz around the
existing allocation at 18 GHz should be fairly straightforward and not
very controversial since the sharing situation is likely to be similar
to that in the existing allocation from 18.1-18.3 GHz.

Sharing conditions in the 10.6-10.68 GHz band may not be compatible with
current uses of the band so it may not be feasible to put more stringent
protections in the Radio Regulations to protect the passive sensors due
to the long-standing use of this band by terrestrial users.

Sharing conditions in the 36-37 GHz band may be easier to deal with
since the propagation effects are quite different from those in the
10.6-10.68 GHz band and the use of the band by the allocated terrestrial
services is minimal to date throughout the world.

**Key technical/regulatory issues to be resolved**: Determining the
appropriate sharing conditions in the two bands shared by passive
sensors will be difficult since both the 10.6-10.68 and 36-37 GHz bands
are shared with terrestrial services whose deployment may not be well
known, or may be changing. Should sharing conditions be agreed upon
within the ITU-R, the question will be whether or not these sharing
conditions can or should be put into the Radio Regulations. Furthermore,
in the 10.6-10.68 GHz band, footnote RR **5.482** already places power
and e.i.r.p. restrictions on the fixed and mobile services.

**Key policy issues to be resolved**: Domestically, footnote **US265**
already applies to the 10.6-10.68 GHz band and is similar to footnote RR
**5.482** in that it places the same limitations on the fixed service in
this country that are applied worldwide. This band is not allocated to
the mobile service in the U.S. However, in the band 36-37 GHz, footnote
**US263** applies and would appear to be a constraint on any limitations
that WRC-07 might place on the fixed and mobile services in this band.

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

1.  conduct sharing analyses between geostationary meteorological
    satellites operating in the space-to-Earth direction and the fixed,
    fixed-satellite and mobile services in the band 18-18.4 GHz

2.  conduct sharing analyses between the EESS (passive) and the SRS
    (passive) on one hand and the fixed and mobile services on the other
    hand in the band 10.6-10.68 GHz to determine appropriate sharing
    criteria

3.  conduct sharing studies between the passive services and the fixed
    and mobile services in the band 36-37 GHz in order to define
    appropriate sharing criteria

Responsible, Contributing and Interested ITU-R groups are as follows:

1.  Responsible: WP 7B - Dave McGinnis (NOAA); Contributing: WP 4A, 9D;
    Interested: WP 8A

2.  Responsible: WP 7C - John Zuzek (NASA); Contributing: WP 9D;
    Interested: WP 8A

3.  Responsible: WP 7C -- John Zuzek (NASA); Contributing: WP 8A, 9D;
    Interested: WP 9B

**Reference Material**:

1.  ITU-R Recommendations SA.514-3, SA.1023, SA.1029-2, F.758-3,
    F.1245-1, F.749-2, F.1568

2.  WRC Resolutions **746** and **742**

[^1]: **Author**: John Zuzek