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  **World Radiocommunication Conference (WRC-07)\  ![](media/image1.png){width="1.9270833333333333in"
  Geneva, 22 October - 16 November 2007**          height="0.8125in"}

                                                   

                                                   

  **PLENARY MEETING**                              **Addendum 5 to Document 43-E**

                                                   **3 September 2007**

                                                   **Original: English**

  African Telecommunications Union Administrations 

  AFRICAN COMMON Proposals for\                    
  the work of the Conference                       

  Agenda item 1.6                                  
  ------------------------------------------------ ----------------------------------------------------

1.6 to consider additional allocations for the aeronautical mobile (R)
service in parts of the bands between 108 MHz and 6 GHz, in accordance
with Resolution **414** **(WRC‑03)** and, to study current satellite
frequency allocations, that will support the modernization of civil
aviation telecommunication systems, taking into account Resolution
**415** **(WRC‑03)**

Resolution 414 (WRC-03) -- Consideration of the frequency range between
108 MHz and 6 GHz for new aeronautical applications

Introduction

This Resolution considers additional spectrum requirements for the
aeronautical mobile (R) service in the frequency range 108 MHz to 6 GHz.

This proposal concentrates on Issue A in the CPM Report, which is
addressing allocations to AM(R)S in the frequency range between 108 MHz
and 6 GHz, under which frequency bands already allocated to aeronautical
services have been investigated for use by the aeronautical mobile (R)
service, and Issue C on the accommodation of aviation security
requirements in the band 5 091-5 150 MHz.

Under Issue A, the African administrations support the methods
identified below for the various frequency bands:

a\) Method 1 is seeking an allocation to AM(R)S in portions of the band
108-117.975 MHz.

b\) [Method 1a]{.underline} is removing the current limitations through
No. 5.197A for AM(R)S in the band 112-117.975 MHz and [is
supported]{.underline}.

c\) Method 2 is adding an allocation to AM(R)S in portions of the band
960-1 164 MHz.

d\) [Method 2b]{.underline} is adding an AM(R)S allocation to the band
960-1 164 MHz and [is supported]{.underline}.

e\) Method 3 is adding an allocation to AM(R)S for surface applications
to the band 5 000-5 010 MHz and 5 010-5 030 MHz. [Both Method 3a and
Method 3b]{.underline} in the CPM Report [are supported]{.underline}. It
must be noted, however, that Method 3 is based on just a single study.

f\) [Method 4]{.underline} is allocating portions of the band 5 030-5
150 MHz to the AM(R)S and [is supported]{.underline}.

Under Issue C an allocation to the AMS for aeronautical security
applications is addressed. Method 5 proposed for an allocation in the
band 5 091-5 150 MHz for AMS is supported.

Proposed amendments to the Radio Regulations are contained below.

Issue A -- to investigate, as a first step, the bands currently
available for use by aeronautical systems in the frequency range between
108 MHz and 6 GHz in order to determine whether additional allocations
to the aeronautical mobile (R) service are required and can be
accommodated in these bands without placing undue constraints to
services to which the frequency bands are currently allocated

ARTICLE 5

Frequency allocations

Section IV -- Table of Frequency Allocations\
(See No. 2.1)

**MOD** AFCP/43A5/1

75.2-137.175 MHz

+----------------------+----------------------+-----------------------+
| Allocation to        |                      |                       |
| services             |                      |                       |
+----------------------+----------------------+-----------------------+
| Region 1             | Region 2             | Region 3              |
+----------------------+----------------------+-----------------------+
| **108-117.975**      |                      |                       |
| AERONAUTICAL         |                      |                       |
| RADIONAVIGATION      |                      |                       |
|                      |                      |                       |
| 5.197 MOD 5.197A     |                      |                       |
+----------------------+----------------------+-----------------------+

**MOD** AFCP/43A5/2

**5.197A** The band 108-117.975 MHz is also allocated on a primary basis
to the aeronautical mobile (R) service operating in accordance with
recognized international aeronautical standards. Such use shall be in
accordance with Resolution **413 (WRC‑03)**. Moreover, use of the band
108-112 MHz by the aeronautical mobile (R) service is limited to systems
that transmit navigational information in support of air navigation and
surveillance functions in accordance with recognized international
aeronautical standards.     (WRC-07)

**MOD** AFCP/43A5/3

RESOLUTION 413 (Rev.WRC‑07)

Use of the band 108-117.975 MHz by aeronautical services

The World Radiocommunication Conference (Geneva, 2007),

considering

*a)* the current allocation of the frequency band 108-117.975 MHz to the
aeronautical radionavigation service (ARNS);

*b)* the current requirements of FM broadcasting systems operating in
the frequency band 87-108 MHz;

*c)* that digital sound broadcasting systems are capable of operating in
the frequency band at about 87-108 MHz as described in Recommendation
ITU‑R BS.1114;

*d)* the need for the aeronautical community to provide additional
services by enhancing navigation and surveillance systems through a
communication data link;

*e)* the need for the broadcasting community to provide digital
terrestrial sound broad­casting services;

*f)* the need for the aeronautical community to provide additional
services for communications relating to safety and regularity of flight
in the band 112-117.975 MHz,

recognizing

*a)* that precedence must be given to the ARNS operating in the
frequency band 108‑117.975 MHz;

*b)* that, in accordance with Annex 10 of the Convention of the
International Civil Aviation Organization (ICAO) on international civil
aviation, all aeronautical systems must meet standards and recommended
practices (SARPs) requirements;

*c)* that within ITU‑R, compatibility criteria between FM broadcasting
systems operating in the frequency band 87-108 MHz and the ARNS
operating in the frequency band 108-117.975 MHz already exist, as
indicated in the most recent version of Recommendation ITU‑R SM.1009;

*d)* that all compatibility issues between FM broadcasting systems and
ICAO standard ground-based systems for the transmission of
radionavigation-satellite differential correction signals have been
addressed,

noting

*a)* that aeronautical systems are converging towards a communication
data link environment to support aeronautical navigation and
surveillance functions, which need to be accommodated in existing radio
spectrum;

*b)* that some administrations are planning to introduce digital sound
broadcasting systems in the frequency band at about 87-108 MHz;

*c)* that no compatibility criteria currently exist between FM
broadcasting systems operating in the frequency band 87-108 MHz and the
planned additional aeronautical systems in the adjacent band
108-117.975 MHz using aircraft transmission;

*d)* that no compatibility criteria currently exist between digital
sound broadcasting systems capable of operating in the frequency band at
about 87-108 MHz and aeronautical services in the band 108-117.975 MHz;

*e)* that surveillance functions include the observation of aircraft
location and velocity, and weather conditions for the purpose of air
traffic control and situational awareness/collision avoidance between
aircraft,

resolves

1 that any AM(R)S systems operating in the band 108-117.975 MHz shall
not cause harmful interference to, nor claim protection from
aeronautical radionavigation service systems operating in accordance
with international aeronautical standards;

2 that any aeronautical mobile (R) service systems planned to operate in
the frequency band 108‑117.975 MHz shall, as a minimum, meet the FM
broadcasting immunity requirements contained in Annex 10 of the ICAO
Convention on International Civil Aviation for existing aeronautical
radionavigation systems operating in this frequency band;

3 that aeronautical mobile (R) service systems operating in the band
108-117.975 MHz shall place no additional constraints on the
broadcasting service or cause harmful interference to stations operating
in the bands allocated to the broadcasting service in the frequency band
87‑108 MHz and No. **5.43** does not apply to systems identified in
*recognizing d)*;

4 that frequencies below 112 MHz shall not be used for aeronautical
mobile (R) service systems excluding the ICAO systems identified in
*recognizing d)* until all potential compatibility issues with the lower
adjacent frequency band 87‑108 MHz have been resolved,

invites ITU‑R

to study any compatibility issues between the broadcasting and
aeronautical services that may arise from the introduction of these
additional aeronautical systems as referenced in *noting a)*, or
appropriate digital sound broadcasting systems, as described in
Recommendation ITU‑R BS.1114 and to develop new or revised ITU‑R
Recommendations as appropriate,

instructs the Secretary-General

to bring this Resolution to the attention of ICAO.

ARTICLE 5

Frequency allocations

Section IV -- Table of Frequency Allocations\
(See No. 2.1)

**MOD** AFCP/43A5/4

890-1 300 MHz

**ADD** AFCP/43A5/5

**5.A06** The band 960-1 164 MHz is also allocated to the aeronautical
mobile (R) service on a primary basis, limited to systems that operate
in accordance with recognized international aeronautical standards. Such
use shall be in accordance with Resolution **\[AM(R)S 960\]
(WRC‑07)**.     (WRC-07)

**ADD** AFCP/43A5/6

RESOLUTION \[AM(R)S 960\] (WRC‑07)

Use of the band 960-1 164 MHz by aeronautical services

The World Radiocommunication Conference (Geneva, 2007),

considering

*a)* the current allocation of the frequency band 960-1 164 MHz to the
aeronautical radionavigation service (ARNS);

*b)* the use of the band 960-1 215 MHz by the ARNS is reserved on a
worldwide basis for the operation and development of airborne electronic
aids to air navigation and any directly associated ground-based
facilities per No. **5.328**;

*c)* that new technologies are being developed to support communications
and air navigation, including airborne and ground surveillance
applications;

*d)* that new applications and concepts in air traffic management which
are data intensive are being developed;

*e)* that, in countries listed in No. **5.312**, the frequency band
960-1 164 MHz is also used by systems in the aeronautical
radionavigation service for which no Standards and Recommended Practices
(SARPs) have been developed and published by the International Civil
Aviation Organization (ICAO),

recognizing

*a)* that precedence must be given to the ARNS operating in the
frequency band 960-1 164 MHz;

*b)* that Annex 10 of the Convention of the ICAO contains Standards and
Recommended Practices (SARPs) for aeronautical radionavigation and
radiocommunication systems used by international civil aviation;

*c)* that all compatibility issues between the ICAO Standard Universal
Access Transceiver (UAT) and other systems which operate in the same
frequency range, excluding the system identified in *considering e)*,
have been addressed within ICAO,

noting

that, excluding the system identified in *recognizing c)*, no
compatibility criteria currently exist between aeronautical mobile (R)
service (AM(R)S) systems proposed for operations in the frequency band
960-1 164 MHz and the existing aeronautical systems in the band,

resolves

1 that prior to operating in the frequency band 960-1 164 MHz any AM(R)S
systems shall have SARPs requirements published in Annex 10 of the ICAO
Convention on International Civil Aviation, and that those requirements
will ensure compatibility with ARNS systems operating in accordance with
international (ICAO) standards;

2 that any AM(R)S systems operating in the band 960-1 164 MHz shall not
cause harmful interference to, nor claim protection from, and shall not
impose constraints on the operation and planned development of
aeronautical radionavigation systems operating in accordance with
international (ICAO) standards in the same band;

3 that any AM(R)S systems operating in the band 960-1 164 MHz shall not
cause harmful interference to, nor claim protection from, and shall not
impose constraints on the operation and planned development of
aeronautical radionavigation systems operating in the countries
identified in *considering e)*;

4 that ITU‑R compatibility studies between AM(R)S systems operating in
the band 960-1 164 MHz and ARNS systems operating in the countries
identified in *considering e)* need to be conducted to develop sharing
conditions to ensure that the conditions of *resolves* 3 are satisfied;

5 that the result of the *resolves* 4 studies shall be reported to
WRC‑11 and the decisions should be taken by WRC‑11 to review, if
appropriate, regulatory provisions in *resolves *3 taking into account
protection requirements of ARNS systems operating in the countries
identified in *considering e)* and the need for global facilitation of
AM(R)S operating in accordance with ICAO standards;

6 to encourage administrations listed in *considering e)* and ICAO, for
the purposes of conducting the ITU‑R studies mentioned in *resolves *4,
to provide to ITU‑R the technical and operational characteristics of
systems involved,

invites ITU-R

1 to conduct studies on operational and technical means to facilitate
sharing between AM(R)S systems operating in the band 960-1 164 MHz and
ARNS systems identified in *considering e)*;

2 to report the results of the studies to WRC‑11,

instructs the Secretary-General

to bring this Resolution to the attention of ICAO.

ARTICLE 5

Frequency allocations

Section IV -- Table of Frequency Allocations\
(See No. 2.1)

**MOD** AFCP/43A5/7

4 800-5 570 MHz

**ADD** AFCP/43A5/8

**5.B06** The bands 5 000-5 010 MHz and 5 010-5 030 MHz are also
allocated to the aeronautical mobile (R) service on a primary basis.
Stations in the aeronautical mobile (R) service operating in the
5 000-5 010 MHz and 5 010-5 030 MHz bands shall be subject to the
condition that no harmful interference is caused to, and no protection
is claimed from, the radionavigation-satellite service and such use
shall be limited to stations operating on the surface of the Earth.

or:

**ADD** AFCP/43A5/9

**5.B06** The bands 5 000-5 010 MHz and 5 010-5 030 MHz are also
allocated to the aeronautical mobile (R) service on a primary basis,
limited to systems operating in accordance with recognized international
aeronautical standards. Such use shall be in accordance with
Resolution **\[AM(R)S-RNSS\] (WRC‑07)**.

**ADD** AFCP/43A5/10

RESOLUTION \[AM(R)S-RNSS\] (WRC‑07)

Compatibility between the aeronautical mobile (R) service and the\
radionavigation-satellite service in the frequency bands\
5 000-5 010 MHz and 5 010-5 030 MHz

The World Radiocommunication Conference (Geneva, 2007),

considering

*a)* the current allocation of the frequency band 5 000-5 010 MHz to the
aeronautical mobile satellite (R) service (AMS(R)S) subject to agreement
obtained under No. **9.21**, the aeronautical radionavigation service
(ARNS) and the radionavigation satellite service (RNSS)
(Earth-to-space);

*b)* the current allocation of the frequency band 5 010-5 030 MHz to the
AMS(R)S subject to agreement obtained under No. **9.21**, the ARNS and
the RNSS (space-to-Earth and space-space);

*c)* that WRC‑07 made allocations to the aeronautical mobile (R) service
(AM(R)S) in the bands 5 000-5 010 MHz and 5 010-5 030 MHz limited to
systems operating in accordance with recognized international
aeronautical standards;

*d)* that ICAO is in the process of identifying the technical and
operating characteristics of new systems operating in the AM(R)S in the
bands 5 000-5 010 MHz and 5 010-5 030 MHz;

*e)* that compatibility between systems operating in accordance with
international aeronautical standards will be ensured by ICAO,

recognizing

*a)* that the International Civil Aviation Organization publishes
recognized international aeronautical standards for AM(R)S;

*b)* that preliminary studies have been conducted within ITU‑R
concerning the sharing and compatibility of surface-based AM(R)S systems
with planned RNSS systems in the 5 000-5 010 MHz and 5 010-5 030 MHz
bands, and compatibility with the radio astronomy service operating in
the band 4 990-5 000 MHz;

*c)* that system characteristics for RNSS and AM(R)S systems planned for
the 5 000-5 010 MHz and 5 010-5 030 MHz bands are still evolving;

*d)* that technical characteristics for the RNSS have not been
established by ITU‑R;

*e)* that the RNSS needs access to the bands 5 000-5 010 MHz for feeder
links and 5 010-5 030 MHz for both service and feeder links in the
longer term;

*f)* that spectrum efficiency is enhanced in situations where new
applications can be implemented compatibly in heavily occupied bands,

noting

that currently only preliminary guidelines are available for the AM(R)S
to ensure protection of the RNSS,

resolves

1 that stations in the AM(R)S operating in the 5 000-5 010 MHz or
5 010-5 030 MHz bands shall operate in accordance with ICAO Standards
and Recommended Practices (SARPs);

2 that stations in the AM(R)S shall be restricted as necessary to ensure
they do not cause harmful interference to, nor claim protection from,
and shall not impose constraints on the operation and planned
development of stations in the RNSS operating in the 5 000-5 010 MHz or
5 010-5 030 MHz bands;

3 that AM(R)S use in both bands shall be limited to surface applications
at airports;

4 to recommend that WRC‑11 review the results of the studies in *invites
ITU‑R* and take appropriate action,

invites ITU‑R

to study the technical and operational issues relating to the
compatibility between the RNSS and the AM(R)S in the bands
5 000-5 010 MHz and 5 010-5 030 MHz,

invites

1 administrations and ICAO to supply technical and operational
characteristics for the AM(R)S necessary for compatibility studies, and
to participate actively in the studies;

2 administrations to supply technical and operational characteristics
and protection criteria for the RNSS necessary for compatibility
studies, and to participate actively in the studies,

instructs the Secretary-General

to bring this Resolution to the attention of ICAO.

ARTICLE 5

Frequency allocations

Section IV -- Table of Frequency Allocations\
(See No. 2.1)

**MOD** AFCP/43A5/11

4 800-5 570 MHz

**[NOC]{.underline}** AFCP/43A5/12

**5.444** The band 5 030-5 150 MHz is to be used for the operation of
the international standard system (microwave landing system) for
precision approach and landing. The requirements of this system shall
take precedence over other uses of this band. For the use of this band,
No. **5.444A** and Resolution **114 (Rev.WRC‑03)** apply.     (WRC-03)

**[NOC]{.underline}** AFCP/43A5/13

**5.444A** *Additional allocation:  *the band 5 091-5 150 MHz is also
allocated to the fixed-satellite service (Earth-to-space) on a primary
basis. This allocation is limited to feeder links of non‑geostationary
mobile-satellite systems in the mobile-satellite service and is subject
to coordination under No. **9.11A**.

In the band 5 091-5 150 MHz, the following conditions also apply:

-- prior to 1 January 2018, the use of the band 5 091-5 150 MHz by
feeder links of non‑geostationary-satellite systems in the
mobile-satellite service shall be made in accordance with
Resolution **114 (Rev.WRC‑03)**;

-- prior to 1 January 2018, the requirements of existing and planned
international standard systems for the aeronautical radionavigation
service which cannot be met in the 5 000-5 091 MHz band, shall take
precedence over other uses of this band;

-- after 1 January 2012, no new assignments shall be made to earth
stations providing feeder links of non-geostationary mobile-satellite
systems;

-- after 1 January 2018, the fixed-satellite service will become
secondary to the aeronautical radionavigation service.     (WRC-03)

**ADD** AFCP/43A5/14

**5.C06** The band 5 091-5 150 MHz is also allocated to the aeronautical
mobile (R) service on a primary basis, limited to surface applications
at airports by systems operating in accordance with recognized
international aeronautical standards. Such use shall be in accordance
with Resolution **\[AM(R)S-5 GHz\] (WRC‑07)**.     (WRC 07)

**ADD** AFCP/43A5/15

RESOLUTION \[AM(R)S**-**5 GHz\] (WRC-07)

Compatibility between the aeronautical mobile (R) service and
fixed-satellite\
service (Earth-to-space) in the band 5 091-5 150 MHz

The World Radiocommunication Conference (Geneva, 2007),

considering

*a)* the allocation of the 5 091-5 150 MHz band to the fixed-satellite
(FSS) (Earth-to-space) limited to feeder links of
non-geostationary-satellite (non-GSO) systems in the mobile-satellite
service (MSS);

*b)* the current allocation of the frequency band 5 000-5 150 MHz to the
aeronautical mobile satellite (R) service (AMS(R)S) subject to agreement
obtained under No. **9.21** and the aeronautical radionavigation service
(ARNS);

*c)* that this conference has allocated the 5 091-5 150 MHz band for the
aeronautical mobile (R) service (AM(R)S) limited to systems operating in
accordance with recognized international aeronautical standards;

*d)* that this conference has allocated the 5 091-5 150 MHz band to the
aeronautical mobile service (AMS) limited to secure and confidential
communications between aircraft and ground intended for systems used in
response to unlawful interruption of aircraft operations;

*e)* that ICAO is in the process of identifying the technical and
operating characteristics of new systems operating in the AM(R)S in the
band 5 091-5 150 MHz;

*f)* that one AM(R)S system, to be used by aircraft operating on the
airport surface, has demonstrated compatibility with the FSS in the
5 091-5 150 MHz band;

*g)* that ITU‑R studies have examined potential sharing among AMS
applications and have shown that the aggregate interference from
aeronautical security, aeronautical telemetry and AM(R)S should total no
more than 3% Δ*T*/*T*,

recognizing

*a)* that precedence is to be given to the microwave landing system
(MLS) in accordance with No. **5.444** in the frequency band
5 030-5 150 MHz;

*b)* that ICAO publishes recognized international aeronautical standards
for AM(R)S systems,

noting

*a)* that the number of FSS transmitting stations required may be
limited;

*b)* that the use of the bands 5 091-5 150 MHz by the AM(R)S needs to
ensure protection of the current or planned use of this band by the FSS
(Earth-to-space);

*c)* that ITU‑R studies describe methods for ensuring compatibility
between the AM(R)S and FSS operating in the band 5 091-5 150 MHz, and
compatibility has been demonstrated for the AM(R)S system referenced in
*considering f)*,

resolves

1 that administrations, in making assignments, shall ensure that
stations in the AM(R)S operate in accordance with International Civil
Aviation Organization (ICAO) Standards and Recommended Practices
(SARPs);

2 that the coordination distance with respect to stations in the FSS
operating in the band 5 091-5 150 MHz shall be based on ensuring that
the received signal at the AM(R)S station from the FSS transmission does
not exceed −143 dB(W/MHz), where the required basic transmission loss
shall be determined using the methods described in Recommendations
ITU‑R P.525‑2 and ITU‑R P.526‑9;

3 that studies of the band 5 091-5 150 MHz be undertaken by ITU‑R
regarding the apportioning of the FSS 3% Δ*T*/*T* aggregate interference
limit between new AMS allocated at this Conference, with the task of
developing or revising Recommendation ITU‑R M.\[AM(R)S/AS
5 091-5 150 MHz\] to ensure that aggregate limit is not exceeded;

4 that, until the studies in *resolves* 3 are completed, a provisional
limit for the AM(R)S of less than *xx*%[^1] Δ*T*/*T* will be applied.
This value will be reviewed at a future conference preferably WRC‑11,

invites

1 administrations and ICAO to supply technical and operational criteria
necessary for sharing studies for the aeronautical mobile (R) service,
and to participate actively in such studies;

2 ICAO to take into account the limit given in *resolves* \[4\] when
developing SARPs for AM(R)S systems operating in the band
5 091-5 150 MHz,

instructs the Secretary-General

to bring this Resolution to the attention of ICAO.

Issue C -- To investigate how to accommodate the requirements for
aeronautical systems in the band 5 091‑5 150 MHz

ARTICLE 5

Frequency allocations

Section IV -- Table of Frequency Allocations\
(See No. 2.1)

**MOD** AFCP/43A5/16

4 800-5 570 MHz

**ADD** AFCP/43A5/17

**5.D06** *Additional allocation:*  The band 5 091-5 150 MHz is also
allocated to the aeronautical mobile service, on a primary basis, in
accordance with Resolution **\[AMS(AS) 5 GHz\] (WRC‑07)**.     (WRC‑07)

**ADD** AFCP/43A5/18

RESOLUTION \[AMS(AS) 5 GHz\] (WRC-07)

Considerations for sharing the band 5 091-5 150 MHz by the\
aeronautical mobile service for aeronautical security\
applications and fixed-satellite service

The World Radiocommunication Conference (Geneva, 2007),

considering

*a)* the current allocation of the 5 091-5 150 MHz band to the
fixed-satellite service (FSS) (Earth-to-space), which is limited to
feeder links of non-geostationary-satellite (non-GSO) systems in the
mobile-satellite service (MSS);

*b)* the current allocation of the frequency band 5 000-5 150 MHz to the
aeronautical mobile-satellite (R) service (AMS(R)S) subject to agreement
obtained under No. **9.21** and the aeronautical radionavigation service
(ARNS);

*c)* that this conference has allocated the 5 091-5 150 MHz band for the
aeronautical mobile (R) service (AM(R)S);

*d)* that this conference has also allocated the 5 091-5 150 MHz band
for the aeronautical mobile service (AMS) limited to secure and
confidential communications between aircraft and ground, intended for
systems used in response to unlawful interruption of aircraft
operations,

recognizing

*a)* that precedence is to be given to the microwave landing system
(MLS) in accordance with No. **5.444** in the frequency band
5 030-5 150 MHz;

*b)* that Resolution **114 (WRC‑03)** applies to the sharing conditions
between the FSS and ARNS in the 5 091-5 150 MHz band;

*c)* that Resolution **\[AM(R)S-5 GHz\] (WRC‑07)** provides guidance on
the use of the band 5 091-5 150 MHz by the AMS,

noting

that ITU‑R studies describe methods for ensuring compatibility between
the AMS for aeronautical security applications and FSS operating in the
band 5 091-5 150 MHz,

resolves

1 that the AMS is limited to stations providing secure and confidential
radiocommunications intended for systems used in response to unlawful
interruption of aircraft operations;

2 that studies of the band 5 091-5 150 MHz be undertaken by ITU‑R
regarding the apportioning of the FSS 3% Δ*T*/*T* aggregate interference
limit between new AMS allocated at this Conference, with the task of
developing or revising Recommendation ITU‑R M.\[AM(R)S/AS
5 091-5 150 MHz\] to ensure that aggregate limit is not exceeded;

3 that, until the studies in *resolves *2 are completed, stations in the
AMS, limited to aeronautical security applications, shall be designed in
such a manner that the transmitter power flux-density be limited to
−140.25 dB(W/(m^2^ ∙ 1.23 MHz)) at an FSS satellite using full Earth
coverage receive antennas with an orbit of 1 414 km. This value will be
reviewed at a future Conference, preferably WRC‑11;

4 that the conditions of *resolves *1 and 3 do not apply to the AM(R)S
in provision No.** 5.D06**;

5 that administrations, in making assignments, shall ensure that the
requirements for the AM(R)S shall take precedence over those of the AMS
for security applications.

*Note -- If an allocation to the AMS limited to aeronautical telemetry
is made under Agenda item 1.5, the provisions of resolves 4 will need to
be revised.*

Resolution 415 (WRC-03) -- Study of current satellite frequency
allocations that will support the modernization of civil aviation
telecommunication systems

**Introduction**

The African administrations support the introduction in the Radio
Regulations of a Recommendation on the use of VSAT systems for
international civil aviation as follows:

**ADD** AFCP/43A5/19

RECOMMENDATION \[XXXX\] (WRC‑07)

Use of frequency allocations to the fixed-satellite service by civil
aviation

The World Radiocommunication Conference (Geneva, 2007),

considering

*a)* that remote and rural areas often still lack a terrestrial-based
communication infrastructure that meets the evolving requirements of
modern civil aviation;

*b)* that the cost of providing and maintaining such an infrastructure
is increasingly expensive, particularly in remote regions;

*c)* that satellite communication systems operating in the
fixed-satellite service provide a real possibility to meet the demands
of the International Civil Aviation Organization (ICAO) communication,
navigation, surveillance and air traffic management (CNS/ATM),
especially in the areas where a terrestrial communication infrastructure
is not available;

*d)* that the use of VSAT terminals, operating in the fixed-satellite
service and which are being deployed on a large scale in aeronautical
communications, has the potential to significantly enhance
communications between air traffic control centres as well as with
remote aeronautical stations;

*e)* that the fixed-satellite service is not a safety service;

*f)* that the benefits of establishing and utilizing satellite
communication systems for civil aviation would also bring additional
benefits for developing and sparsely populated countries by enabling the
use of aeronautical VSAT systems also for non-aeronautical
communications;

*g)* that there is a need in cases identified in *considering f)* to
draw attention to the safety aspects of aeronautical communications with
regard to the non-aeronautical communications,

noting

*a)* that Recommendation **34 (WRC‑95)** states that future world
radiocommunication conferences, whenever possible, should allocate
frequency bands to the most broadly defined services with a view to
providing maximum flexibility in spectrum use;

*b)* that Resolution **20 (Rev.WRC‑03)** *resolves to instruct the
Secretary-General* "to encourage ICAO to continue its assistance to
developing countries which are endeavouring to improve their
aeronautical telecommunications \...",

recommends

1 that administrations, in particular in developing countries and in
remote and rural areas, encourage the implementation of VSAT terminals
that, as required, could support both aeronautical and other
communication requirements;

2 that administrations, to the maximum extent possible and as necessary,
give priority to aeronautical communications where VSAT terminals are
being used for both aeronautical and non-aeronautical communication;

3 that administrations and service providers be encouraged to provide
for priority service restoration or alternative routing in case of
breakdown of a VSAT link;

4 that administrations provide their support to resolve issues related
to interconnectivity between different VSAT networks and to efficient
and timely implementation of VSAT terminals;

5 to invite ICAO, noting Resolution** 20 (Rev.WRC‑03)**, to continue its
assistance to developing countries to improve their aeronautical
telecommunications,

requests the Secretary-General

to bring this Recommendation to the attention of ICAO.

\_\_\_\_\_\_\_\_\_\_\_\_\_\_

[^1]: ^1^ *xx* equals 2% if the Conference allocates aeronautical mobile
    telemetry, and 3% otherwise.