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

                                                   

                                                   

  **PLENARY MEETING**                              **Addendum 20 to Document 41-E**

                                                   **22 August 2007**

                                                   **Original: English**

  Asia-Pacific Telecommunity Administrations       

  common proposals for the work of the conference  

  Agenda item 1.20                                 

                                                   
  ------------------------------------------------ ----------------------------------------------------

1.20 to consider the results of studies, and proposals for regulatory
measures if appropriate regarding the protection of the EESS (passive)
from unwanted emissions of active services in accordance with
Resolution **738** **(WRC‑03)**

Introduction

WRC-07 Agenda item 1.20 addresses the compatibility between the Earth
exploration-satellite service (EESS) (passive) and active services in
adjacent or nearby bands as specified in Resolution 738 (WRC-03). The
results of the studies carried out for each band pair under this agenda
item are documented in Report ITU-R SM.2092, which replaces
Recommendation ITU‑R SM.1633 for the purpose of this Resolution.

Based on the results of these studies, regulatory measures to ensure
protection of the EESS (passive) from unwanted emissions of active
services may be considered, while taking into account the impact on all
concerned services of implementing or not implementing such measures.

For each band pair studied, the appropriate method to satisfy the agenda
item may be decided independently. In addition to the methods described
below, the Conference may decide that, for a given band pair, no
regulatory measures are required.

One method is to establish, in an EESS (passive) band, a mandatory power
limit for unwanted emissions from a single transmitter of a specified
service in an adjacent or nearby band without examination by the Bureau.
Another method is to establish, in an EESS (passive) band, a
non-mandatory power limit for unwanted emissions from a single
transmitter of a specified service in an adjacent or nearby band. The
third method is to strongly encourage administrations to take all
practicable steps to limit unwanted emissions in EESS (passive) bands
from active services in adjacent and nearby frequency bands.

APT members support the ITU-R studies regarding the compatibility
analyses for each band pair under this agenda item, which were
documented in Report ITU-R SM.2092. APT members support the
considerations described in the CPM Report on WRC-07 Agenda item 1.20
that the regulatory measures for regulating unwanted emissions from
active services should be appropriately determined for each band pair
independently taking into account the results of the ITU-R studies.

The expressed consensus is in favour of establishing, in the following
active services bands, a mandatory power limit for unwanted emissions in
EESS (passive) bands from a single transmitter of a specified service.
However, it is the opinion of APT members that the mandatory power
limits will only be applicable for active systems brought into use after
a future date to be decided by WRC-07.

ARTICLE 5

Frequency allocations

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

**MOD** ASP/41A20/322

1 300-1 525 MHz

+----------------------+----------------------+-----------------------+
| Allocation to        |                      |                       |
| services             |                      |                       |
+----------------------+----------------------+-----------------------+
| Region 1             | Region 2             | Region 3              |
+----------------------+----------------------+-----------------------+
| **1 427-1 429**      |                      |                       |
| SPACE OPERATION      |                      |                       |
| (Earth-to-space) ADD |                      |                       |
| 5.A120               |                      |                       |
|                      |                      |                       |
| FIXED                |                      |                       |
|                      |                      |                       |
| MOBILE except        |                      |                       |
| aeronautical mobile  |                      |                       |
|                      |                      |                       |
| 5.341                |                      |                       |
+----------------------+----------------------+-----------------------+

**ADD** ASP/41A20/323

**5**.**A120** Stations in the space operation service (Earth-to-space)
in the band 1 427-1 429 MHz shall operate in accordance with the
provisions of Resolution **\[ASP/AI1.20/1-EESS (PASSIVE)\]
(WRC-07)**.     (WRC-07)

**Reasons:** Studies in Report ITU-R SM.2092 indicate that EESS
(passive) systems in the 1 400-1 427 MHz band are protected if unwanted
emissions in that band from space operation service (Earth-to-space)
transmitters in the 1 427-1 429 MHz band do not exceed --36 dBW in any
27 MHz reference bandwidth. Measures to ensure that future space
operation service (Earth-to-space) transmitters in the 1 427-1 429 MHz
band do not exceed this level will not constitute an undue burden on the
space operation service.

**MOD** ASP/41A20/324

22-24.75 GHz

+-----------------------+-----------------------+-----------------------+
| Allocation to         |                       |                       |
| services              |                       |                       |
+-----------------------+-----------------------+-----------------------+
| Region 1              | Region 2              | Region 3              |
+-----------------------+-----------------------+-----------------------+
| **22.55-23.55** FIXED |                       |                       |
|                       |                       |                       |
| INTER-SATELLITE ADD   |                       |                       |
| 5.B120                |                       |                       |
|                       |                       |                       |
| MOBILE                |                       |                       |
|                       |                       |                       |
| 5.149                 |                       |                       |
+-----------------------+-----------------------+-----------------------+

**ADD** ASP/41A20/325

**5**.**B120** Stations in the inter-satellite service (non-GSO only) in
the band 22.55-23.55 GHz shall operate in accordance with the provisions
of Resolution **\[ASP/AI1.20/1-EESS (PASSIVE)\] (WRC-07)**.     (WRC-07)

**Reasons:** Studies in Report ITU-R SM.2092 indicate that EESS
(passive) systems in the 23.6‑24 GHz band are protected if unwanted
emissions in that band from inter-satellite service non‑GSO transmitters
in the 22.55-23.55 GHz band do not exceed --46 dBW in any 200 MHz
reference bandwidth. Measures to ensure that future non-GSO
inter-satellite service systems in the 22.55-23.55 GHz band do not
exceed this level will not constitute an undue burden on the
inter-satellite service.

The simulations of the ISS links in the GSO data relay systems indicate
in Report ITU-R SM.2092 that the permissible interference criteria of
Recommendation ITU-R RS.1029-2 will be satisfied for all the passive
sensors.

**MOD** ASP/41A20/326

29.9-34.2 GHz

+-----------------------+-----------------------+-----------------------+
| Allocation to         |                       |                       |
| services              |                       |                       |
+-----------------------+-----------------------+-----------------------+
| Region 1              | Region 2              | Region 3              |
+-----------------------+-----------------------+-----------------------+
| **31-31.3** FIXED     |                       |                       |
| 5.543A ADD 5.C120     |                       |                       |
|                       |                       |                       |
| MOBILE                |                       |                       |
|                       |                       |                       |
| Standard frequency    |                       |                       |
| and time              |                       |                       |
| signal-satellite      |                       |                       |
| (space-to-Earth)      |                       |                       |
|                       |                       |                       |
| Space research 5.544  |                       |                       |
| 5.545                 |                       |                       |
|                       |                       |                       |
| 5.149                 |                       |                       |
+-----------------------+-----------------------+-----------------------+

**ADD** ASP/41A20/327

**5**.**C120** Stations in the fixed service (except HAPS) in the band
31-31.3 GHz shall operate in accordance with the provisions of
Resolution **\[ASP/AI1.20/1-EESS (PASSIVE)\] (WRC‑07)**.\
(WRC‑07)

**Reasons:** Studies in Report ITU-R SM.2092 indicate that EESS
(passive) systems in the 31.3‑31.5 GHz band are protected if unwanted
emissions in that band from fixed service (except HAPS) transmitters in
the 31.0-31.3 GHz band do not exceed --38 dBW in any 100 MHz reference
bandwidth. Measures to ensure that future FS systems in the 31.0-31.3
GHz band do not exceed this level will not constitute an undue burden on
the fixed service.

**MOD** ASP/41A20/328

40-47.5 GHz

**MOD** ASP/41A20/328A

47.5-51.4 GHz

**ADD** ASP/41A20/329

**5.D120** Stations in the fixed-satellite service (Earth-to-space) in
the bands 47.2-50.2 GHz (Regions 2 and 3), 49.44-50.2 GHz (Region 1),
and 50.4-51.4 GHz shall operate in accordance with the provisions of
Resolution **\[ASP/AI1.20/1-EESS (PASSIVE)\] (WRC-07)**.     (WRC-07)

**Reasons:** Studies in Report ITU-R SM.2092 indicate that EESS
(passive) systems in the 50.2‑50.4 GHz band are protected if unwanted
emissions in that band from fixed-satellite service transmitters in the
47.2-50.2 GHz band do not exceed --20 to --10 dBW in any 200 MHz
reference bandwidth. Measures to ensure that future fixed-satellite
service systems in the 47.2-50.2 GHz band do not exceed this level will
not constitute an undue burden on the fixed service.

Studies in Report ITU-R SM.2092 indicate that EESS (passive) systems in
the 50.2-50.4 GHz band are protected if unwanted emissions in that band
from fixed-satellite service transmitters in the 50.4-51.4 GHz band do
not exceed --20 to --10 dBW in any 200 MHz reference bandwidth. Measures
to ensure that future fixed-satellite service systems in the 50.4-51.4
GHz band do not exceed this level will not constitute an undue burden on
the fixed service.

**MOD** ASP/41A20/330

51.4-55.78 GHz

+-----------------------+-----------------------+-----------------------+
| Allocation to         |                       |                       |
| services              |                       |                       |
+-----------------------+-----------------------+-----------------------+
| Region 1              | Region 2              | Region 3              |
+-----------------------+-----------------------+-----------------------+
| **51.4-52.6** FIXED   |                       |                       |
| ADD 5.E120            |                       |                       |
|                       |                       |                       |
| MOBILE                |                       |                       |
|                       |                       |                       |
| 5.547 5.556           |                       |                       |
+-----------------------+-----------------------+-----------------------+

**ADD** ASP/41A20/331

**5.E120** Stations in the fixed service in the band 51.4-52.6 GHz shall
operate in accordance with the provisions of Resolution
**\[ASP/AI1.20/1-EESS (PASSIVE)\] (WRC-07)**.     (WRC-07)

**Reasons:** Studies documented in Report ITU-R SM.2092 indicate that
EESS (passive) systems in the 52.6-54.25 GHz band are protected if
unwanted emissions in that band from fixed service transmitters in the
51.4-52.6 GHz band do not exceed --33 dBW in any 100 MHz reference
bandwidth. Measures to ensure that future FS systems in the 51.4-52.6
GHz band do not exceed this level will not constitute an undue burden on
the fixed service.

**MOD** ASP/41A20/332

**5.340** All emissions are prohibited in the following bands:

> 1 400-1 427 MHz,
>
> 2 690-2 700 MHz, except those provided for by No. **5.422**,
>
> 10.68-10.7 GHz, except those provided for by No. **5.483**,
>
> 15.35-15.4 GHz, except those provided for by No. **5.511**,
>
> 23.6-24 GHz,
>
> 31.3-31.5 GHz,
>
> 31.5-31.8 GHz, in Region 2,
>
> 48.94-49.04 GHz, from airborne stations
>
> 50.2-50.4 GHz,
>
> 52.6-54.25 GHz,
>
> 86-92 GHz,
>
> 100-102 GHz,
>
> 109.5-111.8 GHz,
>
> 114.25-116 GHz,
>
> 148.5-151.5 GHz,
>
> 164-167 GHz,
>
> 182-185 GHz,
>
> 190-191.8 GHz,
>
> 200-209 GHz,
>
> 226-231.5 GHz,
>
> 250-252 GHz.     (WRC‑03)

**Reasons:** After the proposed Resolution \[EESS (PASSIVE)\] is
approved, No. 5.340.1 needs to be suppressed.

**ADD** ASP/41A20/333

RESOLUTION \[ASP/AI1.20/1-EESS (passive)\] (WRC‑07)

Compatibility between the Earth exploration-satellite\
service (passive) and active services

The World Radiocommunication Conference (Geneva, 2007),

considering

*a)* that primary allocations have been made to various space services
in the Earth-to-space direction such as the fixed-satellite service,
space operation service, inter-satellite service and/or to terrestrial
services such as the fixed service, mobile service and radiolocation
service, hereafter referred to as "active services", in bands adjacent
or nearby to bands allocated to the Earth exploration-satellite service
(EESS) (passive);

*b)* that unwanted emissions from active services may cause unacceptable
interference to the EESS (passive);

*c)* that for technical or operational reasons, the general limits in
Appendix **3** may be insufficient in protecting the EESS (passive) in
specific bands;

*d)* that, in many cases, the frequencies used by the EESS (passive)
sensors are chosen to study natural phenomena producing radio emissions
at frequencies fixed by the laws of nature, and therefore shifting
frequency to avoid or mitigate interference problems may not be
possible;

*e)* that it is necessary to ensure an equitable burden sharing for
achieving compatibility between active and passive services operating in
adjacent or nearby bands,

noting

*a)* that frequency bands covered by No. **5.340** which prohibits all
emissions need to be fully protected as they are unique natural
resources;

*b)* that Report ITU‑R SM.2092 provides a methodology for conducting the
compatibility studies between active and passive services operating in
adjacent and nearby bands and develops all relevant scenarios;

*c)* that Recommendation ITU-R RS.1029-2 provides the permissible
interference criteria for satellite passive remote sensing,

resolves

1 that unwanted emissions from stations, brought into use after
\[effective date of WRC-07 Final Acts\], in the bands and services
listed in Table 1, shall not exceed the corresponding limits in that
table;

2 that the Bureau shall make no examination or finding with respect to
this Resolution under either Article **9** or **11**.

TABLE 1

  -------------- -------------- ------------------ ----------------------------
  Passive band   Active band    Active service     The maximum power density
                                                   delivered to the antenna of
                                                   a station in the passive
                                                   band

  1 400-1 427    1 427-1 429    SOS                --36 dB(W/27 MHz)
  MHz            MHz                               

  23.6-24 GHz    22.55-23.55    ISS\               --46 dB(W/200 MHz)
                 GHz            (non-GSO only)     

  31.3-31.5 GHz  31-31.3 GHz    FS (except HAPS)   --38 dB(W/100 MHz)

  50.2-50.4 GHz  47.2-50.2 GHz  FSS\               --10 dB(W/200 MHz)
                 (Regions 2 and (Earth-to-space)   
                 3)                                

  50.2-50.4 GHz  49.44-50.2 GHz                    
                 (Region 1)                        

  50.2-50.4 GHz  50.4-51.4 GHz  FSS                --10 dB(W/200 MHz)
                                (Earth-to-space)   

  52.6-54.25 GHz 51.4-52.6 GHz  FS                 --33 dB(W/100 MHz)
  -------------- -------------- ------------------ ----------------------------

**Reasons:** See ADD ASP/41A20/323, 325, 327, 329 and 331.

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