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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 6 to\
                                                   Document 41-E**

                                                   **22 August 2007**

                                                   **Original: English**

  Asia-Pacific Telecommunity Administrations       

  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)**

Introduction

Agenda item 1.6 addresses two Resolutions (Resolution 414 (WRC-03) and
415 (WRC-03)) and four issues related to the AM(R)S and the
modernization of civil aviation telecommunication systems.

The issues related to Resolution 414 (WRC-03) seek consideration of an
additional spectrum allocation for AM(R)S in part of the bands between
108 MHz and 6 GHz.

# Part 1 -- The band 108-117.975 MHz

Introduction

APT members do not support any modifications to the current allocations
in the band 108‑112 MHz. APT members support the need for additional
allocations to AM(R)S in the band 112‑117.975 MHz.

ARTICLE 5

Frequency allocations

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

**MOD** ASP/41A6/50

75.2-137.175 MHz

+----------------------+----------------------+-----------------------+
| Allocation to        |                      |                       |
| services             |                      |                       |
+----------------------+----------------------+-----------------------+
| Region 1             | Region 2             | Region 3              |
+----------------------+----------------------+-----------------------+
| **108-112**          |                      |                       |
| AERONAUTICAL         |                      |                       |
| RADIONAVIGATION      |                      |                       |
|                      |                      |                       |
| 5.197 MOD 5.197A     |                      |                       |
+----------------------+----------------------+-----------------------+

**Reasons:** As ITU-R studies emphasize the limitation of AM(R)S to
systems that transmit navigational information in support of air
navigation and surveillance functions, as specified in RR
No.** **5.197A, they should be removed from the appropriate part of the
band 112-117.975 MHz. This band is being considered to support AM(R)S
radio line-of-sight applications. Moreover, the method to calculate and
achieve compatibility between FM sound broadcasting and ground-based
augmentation systems (GBAS) established in ITU-R as an ITU-R
Recommendation (ITU-R M.\[8B.GBAS\]) Study Group 8B, for which final
approval action will be taken by the Radiocommunication Assembly 2007,
as scheduled. Below this range, compatibility assessment between the
broadcasting service in the band 88-108 MHz and AM(R)S communication
systems requires a guardband between the two systems with a sufficient
amount. Therefore, as ITU-R studies concluded, it is not feasible to
allocate AM(R)S below 112 MHz.

**MOD** ASP/41A6/51

75.2-137.175 MHz

+----------------------+----------------------+-----------------------+
| Allocation to        |                      |                       |
| services             |                      |                       |
+----------------------+----------------------+-----------------------+
| Region 1             | Region 2             | Region 3              |
+----------------------+----------------------+-----------------------+
| **112-117.975**      |                      |                       |
| AERONAUTICAL         |                      |                       |
| RADIONAVIGATION      |                      |                       |
|                      |                      |                       |
| AERONAUTICAL MOBILE  |                      |                       |
| (R)                  |                      |                       |
|                      |                      |                       |
| 5.197 MOD 5.197A     |                      |                       |
+----------------------+----------------------+-----------------------+

**Reasons:** The allocation in the band 112-117.975 MHz is required to
alleviate frequency congestion of services supporting safety and
regularity of flight due to growth in air traffic.

Compatibility between navigation systems in the band 108-117.975 MHz and
the extended VHF band AM(R)S systems will be ensured by ICAO.
Out-of-band compatibility with FM broadcasters will be ensured by
incorporating reference to Resolution 413 (WRC-03) in the new
allocation, as well as similar FM immunity requirements to those already
existing for the VOR, ILS, GBAS and VDL Mode 4 avionics.

**MOD** ASP/41A6/52

**5.197A** The band 108-117.975 MHz is also allocated on a primary basis
to the aeronautical mobile (R) service limited to systems operating in
accordance with recognized international aeronautical standards. Such
use shall be in accordance with Resolution **413 (Rev.WRC‑07)** and
shall not cause harmful interference to nor claim protection from
stations operating in the aeronautical radionavigation service which
operate in accordance with international aeronautical standards.
Moreover, use of the band 108-[112 ]{.underline}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)

**Reasons:** With the AM(R)S operations limited to above 112 MHz, it may
be practical to meet mandatory compatibility requirements between the
broadcasting service in the band 88-108 MHz and AM(R)S communication
systems.

**MOD** ASP/41A6/53

RESOLUTION 413 (Rev.WRC‑0~~3~~[7]{.underline})

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)]{.underline}* the need for the aeronautical community to provide
additional aeronautical mobile services for communications relating to
safety and regularity of flight in the band
[112]{.underline}-1 17.975 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;

*[e)]{.underline}* [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;]{.underline}

*f)* that the band 112-116 MHz is also allocated to the AM(R)S on a
primary basis under recognized international aeronautical standards
after the completion of a compatibility study confirmed by the ITU-R,

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 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;

2 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)*;

3 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.

**Reasons:** Out-of-band compatibility with frequency modulation (FM)
broadcasting will be ensured by incorporating a reference to
Resolution 413 (WRC‑03) in the new allocation, as well as by developing
FM immunity requirements similar to those for existing systems operating
in the band 108-117.975 MHz. This modification to
Resolution 413 (WRC‑03) is required in order to address new AM(R)S
communications allocations.

# Part 2 -- The band 960-1 164 MHz

Introduction

APT members support the need for the additional allocations to AM(R)S in
the band 960-1 164 MHz.

ARTICLE 5

Frequency allocations

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

**MOD** ASP/41A6/54

890-1 300 MHz

**Reasons:** APT members support the need for the additional allocations
to AM(R)S in the band 960-1 164 MHz.

**ADD** ASP/41A6/55

**5.A16** 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 **\[ASP/AI1.6/1-AM(R)S
960\] (WRC-07)**. 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.

**Reasons:** ICAO and ITU-R studies indicate compatibility between
AM(R)S and existing systems operating on an international basis in this
band.

**ADD** ASP/41A6/56

RESOLUTION \[ASP/ai1.6/1-AM(R)S 960\] (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** and in some other
countries 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;

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.

**Reasons:** ICAO and ITU-R studies indicate compatibility between
AM(R)S and existing systems operating on an international basis in this
band. Compatibility between AM(R)S and existing or planned aeronautical
systems in accordance with international aeronautical standards will be
ensured by ICAO.

# Part 3 -- The bands 5 000-5 010 and 5 010-5 030 MHz

Introduction

APT members do not support any modifications to the current allocations
in the bands 5 000‑\
5 010 MHz and 5 010-5 030 MHz.

ARTICLE 5

Frequency allocations

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

**[NOC]{.underline}** ASP/41A6/57

4 800-5 570 MHz

**Reasons:** In the 5 000-5 010 MHz band, interference from future RNSS
feeder links to proposed AM(R)S systems is likely. Regarding the 5 010-5
030 MHz band, RNSS service links in other bands are facing congestion,
and there is a need to preserve the unconstrained future use of the
5 GHz allocation for RNSS. Preliminary studies of the 5 010-5 030 MHz
band have indicated that sharing would be very difficult due to the need
to ensure significant separation distances between AM(R)S transmitters
and ubiquitously operated radionavigation-satellite service receivers.

# Part 4 -- The band 5 030-5 091 MHz

Introduction

APT members do not support any modifications to the current allocations
in the band 5 030-5 091 MHz (MLS core band).

# Part 5 -- The band 5 091-5 150 MHz

Introduction

APT members support the need for additional allocations to AM(R)S in the
band 5 091-5 150 MHz with the additional allocations to AMS limited to
aeronautical security applications in the band 5 091-5 150 MHz.

ARTICLE 5

Frequency allocations

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

**MOD** ASP/41A6/58

4 800-5 570 MHz

**Reasons:** CPM studies with aeronautical radionavigation systems in
this band indicate that a large separation distance is required between
the aeronautical mobile telemetry (AMT) transmitters and microwave
landing system (MLS) ground stations when co-frequency. Operation of AMT
in this band would require considerable constraints to be implemented,
thus reducing the effectiveness of the proposed AMT systems. No change
is required.

**MOD** ASP/41A6/59

4 800-5 570 MHz

**Reasons:** The identification of new frequency bands for AM(R)S will
facilitate a worldwide harmonized approach for administrations choosing
to implement AM(R)S in this band. Studies have demonstrated that
co-frequency sharing with existing FSS systems is achievable as long as
the aeronautical security applications do not operate in co-frequency
with AM(R)S surface applications at airports within the footprint of an
FSS satellite.

**ADD** ASP/41A6/60

**5.B16** 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 **\[ASP/AI1.6/2-AM(R)S-5 GHz\] (WRC‑07)**.

**Reasons:** Use of AM(R)S in the band 5 091-5 150 MHz shall be limited
to systems on the surface of airports and operating in accordance with
international (ICAO) standards. Compatibility with other existing or
planned aeronautical systems operating in this band in accordance with
international aviation standards will be ensured by ICAO.

**ADD** ASP/41A6/61

**5.C16** *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 **\[ASP/AI1.6/3-AMS(AS) 5 GHz\] (WRC‑07)**.

**Reasons:** This frequency band for AMS aeronautical security will
promote a global harmonized approach to implementation in the identified
band. Furthermore, preliminary ITU-R studies have shown compatibility
between the proposed AM(R)S and the FSS.

**ADD** ASP/41A6/62

RESOLUTION \[ASP/AI1.6/2-AM(R)S**-**5 GHz\] (WRC-07)

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

*e)* that the International Civil Aviation Organization (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% for Δ*T~s~*/*T~s~*,

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 band 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 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% for Δ*T~s~*/*T~s~*
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] for Δ*T~s~*/*T~s~* shall be
applied. This value will be reviewed at a future conference, preferably
WRC‑11,

invites

1 administrations and ICAO to supply the 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.

**Reasons:** Use of AM(R)S allocation in the band 5 091-5 150 MHz shall
be limited to the systems on the surface of airports and operating in
accordance with international (ICAO) standards. Compatibility with other
existing or planned aeronautical systems operating in accordance with
international aviation standards will be ensured by ICAO.

**ADD** ASP/41A6/63

RESOLUTION \[ASP/AI1.6/3-AMS(AS) 5 GHz\] (WRC-07)

Considerations for sharing the band 5 091-5 150 MHz by the\
aeronautical mobile service for aeronautical security\
applications and the 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) services;

*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 radiocommunications 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 the ITU-R
regarding the apportioning of the FSS 3% for Δ*T~s~*/*T~s~* aggregate
interference limit between the 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 RR\
No.** 5.AM2**;

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

*Note 1 -- 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.*

**Reasons:** This frequency band for AMS aeronautical security will
promote a globally harmonized approach to implementation in the
identified band. Furthermore, preliminary ITU-R studies have shown
compatibility with the FSS.

# Part 6 -- Resolution 415 (WRC-03) -- Study of current satellite frequency allocations that will support the modernization of civil aviation telecommunication systems

**NOC** ASP/41A6/63A

APT members do not support any modifications to the current satellite
allocations to support the modernization of civil aviation
telecommunications systems.

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

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