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                                                 **PLENARY MEETING**

  United States of America                       

  proposals for the work of the conference       

  proposal for resolution 801\                   
  upgrade radiolocation 9 000-9 200 Mhz and 9    
  300-9 500 mhz\                                 
  to primary                                     
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Agenda item 7.2

7.2 to recommend to the Council items for inclusion in the agenda for
the next WRC, and to give its views on the preliminary agenda for the
subsequent conference and on possible agenda items for future
conferences, taking into account Resolution **801 (WRC-2000)**

Background information

Working Party 8B is conducting studies in accordance with Question
ITU-R 226/8, titled, "Characteristics of and protection criteria for
radars operating in the radiodetermination service". Working Party 8B
has also developed a preliminary draft new Recommendation on
Characteristics of and protection criteria for radars operating in the
radiodetermination service in the frequency band 8 500-10 500 MHz. Study
Group 8 approved a draft new Question -- Compatibility of
radionavigation and radiolocation services operating in the bands 9
000-9 200 MHz and 9 300-9 500 MHz. Working Party 8B has already begun
studies on this upgrade and is expected to complete their studies prior
to WRC-07.

The frequency band 9 000-9 200 MHz is allocated to the aeronautical
radionavigation service on a primary basis, limited to ground-based
radars and associated airborne transponders, and the radiolocation
service on a secondary basis. Also, in several countries, the band
9 000-9 200 MHz, is allocated to the radionavigation service on a
primary basis (5.473). In the band 9 200-9 500 MHz, search and rescue
transponders (SART) may be used (5.474). The band 9 300-9 500 MHz is
allocated to the radionavigation service on a primary basis, and to the
radiolocation service on a secondary basis. Also, in the band
9 300-9 500 MHz, the aeronautical radionavigation service is limited to
airborne weather radars and ground-based radars; and, in addition,
ground-based radar beacons permitted in the band 9 300-9 320 MHz
(5.475).

The 9 000-9 500 MHz range is optimum for the radars due to antenna,
signal propagation, target detection, and large necessary bandwidth
characteristics.

Airborne radiodetermination radars currently operating in these bands
are: search and track radars, search radars, ground-mapping and
terrain-following radars, track radars and surface search radars.
Shipborne radiodetermination radars used in this band include: search
and navigation radars

(shipborne and shore-based), track radars, low altitude and surface
search radars, maritime radionavigation radars, and surface surveillance
and navigation radars. Beacons and ground-based radiodetermination
radars are currently operating in these bands and include: rendezvous
beacon airborne and ground based transportable radars, ground based
transportable tracking radars and ground‑based transportable precision
approach and landing radars.

It is necessary to upgrade the radiolocation service to primary in the
band 9 000-9 200 MHz and 9 300-9 500 MHz in order for existing and
planned radar systems to achieve their maximum potential and perform
their required missions. There is a trend towards frequency-agile type
radar systems in this band that will suppress or reduce interference and
requiring larger bandwidths for the radars to function. Emerging
requirements for higher target resolution necessitate wider contiguous
emission bandwidths. An upgrade is required to provide radar system
developers, manufacturers and investors confidence that their systems
will have the regulatory assurance to operate worldwide.

Proposal

**ADD** USA/12/155

**2.xx** to consider upgrading the allocation to the radiolocation
service to primary in the frequency range 9 000-9 200 MHz and
9 300-9 500 MHz, taking into account Resolution **\[USA/7.2/RRR\]
(WRC-03)**.

**Reasons:** To provide necessary spectrum for existing and planned
radar systems to operate in the 9 000-9 500 MHz range. An upgrade to a
primary allocation worldwide is required to provide radar system
developers, manufacturers and investors confidence that their systems
will have the regulatory assurance to operate globally.

**ADD** USA/12/156

DRAFT RESOLUTION \[USA/7.2/RRR\] (WRC-03)

Consideration by a future competent world radiocommunication conference\
of the upgrade of the radiolocation service to a primary allocation in
the\
frequency bands 9 000-9 200 and 9 300-9 500 MHz

The World Radiocommunication Conference (Geneva, 2003),

considering

*a)* that there is a need to provide contiguous spectrum in the bands
around 9 GHz for the radiolocation service allocated on a primary basis
worldwide, in order to provide adequate spectrum for new radar systems
to function;

*b)* that emerging requirements for increased image resolution and
increased range accuracy necessitate wider contiguous emission
bandwidths;

*c)* that there is a need to upgrade the status of frequency allocations
to the radiolocation service in the frequency range 9 000-9 200 MHz and
9 300-9 500 MHz in order for existing and planned radar systems to
satisfy their required missions;

*d)* that radiolocation services, while recognizing radionavigation as a
safety service as delineated in RR No. **4.10**, have demonstrated
compatible operations with radionavigation services in the bands
9 000-9 200 MHz and 9 300-9 500 MHz over many years because of using
similar system characteristics of low-duty cycle emissions, scanning
beams and interference reduction techniques;

*e)* that previous and ongoing studies in ITU-R addressing other bands
indicate that compatibility in the bands 9 000-9 200 MHz and 9 300-9 500
MHz between the radionavigation and radiolocation services is feasible;

*f)* that radars in the radiolocation service operate on a primary basis
worldwide in the band 9 200-9 300 MHz, and operate on a secondary basis
to the radionavigation service in the 9 000-9 200 and 9 300-9 500 MHz;

*g)* that Recommendation ITU-R M.1313 contains the technical
characteristics and protection criteria for maritime radars in the band
9 300-9 500 MHz;

*h)* that Recommendation ITU-R M.1372 identifies interference reduction
techniques which enhance compatibility among radar systems,

recognizing

*a)* that ITU-R Study Group 8 adopted draft new Question ITU-R \[9
GHz\]/8 on compatibility of radionavigation and radiolocation services
operating in the bands 9 000-9 200 MHz and 9 300-9 500 MHz;

*b)* that ITU-R and administrations have already started work on this
issue by developing a preliminary draft new Recommendation on radar
characteristics and protection criteria, and have conducted initial
compatibility measurements;

*c)* that it is important to protect the existing primary services
having allocations in the frequency bands 9 000-9 200 MHz and 9 300-9
500 MHz;

*d)* that an upgrade to a primary allocation worldwide is required to
give radar system developers, manufacturers and investors confidence
that their systems will have the regulatory assurance to operate
globally,

resolves

1 to invite ITU-R to continue to study, as a matter of urgency, the
technical characteristics, protection criteria, and other factors of
radiolocation and radionavigation systems that ensure compatible
operations in the bands 9 000‑9 200 MHz and 9 300-9 500 MHz;

2 to invite ITU-R, as a matter of urgency:

-- to study the feasibility of compatible operations between radars of
the radiolocation and radionavigation services in the bands 9 000-9 200
and 9 300-9 500 MHz though testing and measurements;

-- to continue to study and conduct test measurements to determine the
protection criteria for radionavigation and radiolocation systems in the
bands 9 000-9 200 and 9 300‑9 500 MHz;

3 that the results of the above studies should be included in one or
more Recommendations;

4 that, taking into account the results of ITU-R studies and the
Conference Preparatory Meeting, WRC-07 consider the upgrade of the
radiolocation service to a primary allocation in the bands 9 000-9 200
MHz and 9 300-9 500 MHz,

invites ITU-R

to conduct, and complete in time for WRC-07, the appropriate studies
leading to technical and operational recommendations to facilitate
sharing between the radionavigation and radiolocation services.

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