December 20, 1999

Mr. Donald Abelson

Chief of the International Bureau

Federal Communications Commission

Washington, D.C. 20554

Dear Mr. Abelson:

The National Telecommunications and Information Administration on behalf
of the Executive Branch Agencies, has approved the release of additional
proposals for WRC-2000. Included is a draft proposal agenda item
1.15.1(RNSS), proposed changes to the proposal for agenda item 1.16, a
draft proposal for the modification Recommendation **66** and a draft
proposal for the suppression of Resolutions **60** and **63**. This
package is being forwarded to you for review. Karl Nebbia from my staff
will contact Damon Ladson and reconcile any differences.

> Sincerely,

###### 

> William T. Hatch
>
> Acting Associate Administrator
>
> Office of Spectrum Management

Enclosure

#  

# Proposals for Agenda Item 1.15.1

## to consider new allocations to the radionavigation-satellite service in the range from 1 to 6 GHz required to support developments

### Proposal for additional Radionavigation Satellite Service (RNSS) signals

**Background Information:** The 5 GHz band presents no unique advantages
for new RNSS systems and all RNSS requirements can be satisfied by
existing and new allocation to be implemented in the 1200 and 1600 MHz
bands. The increased power required at 5 GHz compared to the lower
frequencies makes an allocation for RNSS at 5 GHz questionable because
it may not be feasible to implement satellite networks from an economic
standpoint.

ITU-R studies to date do not support the need for an allocation for RNSS
at 5 GHz. There are a number of unresolved sharing situations at 5 GHz
including protection the international Microwave Landing System (MLS)
and Mobile-Satellite (MS) feeder links now operating at 5000-5150 MHz.

There are recognized difficulties in fully protecting existing Radio
Astronomy operations. See the CPM Report, Section 2.4.1.3.1: "The
separation distance between RNSS (space-to-earth) and the radio
astronomy service would be a minimum of 10 MHz to protect Radio
Astronomy inside its allocation. This may cause difficulties due to the
radio astronomy receiver sensitivity outside the band allocated to the
radio astronomy service."

Studies under Resolution **114 (WRC-95)** are continuing and could
result in changes in the future use of the 5000-5150 MHz band.

## Proposal:

4 800-5 830 MHz

+--------------------+--------------------------+----------------------+
| Allocation to      |                          |                      |
| services           |                          |                      |
+--------------------+--------------------------+----------------------+
| Region 1           | Region 2                 | Region 3             |
+--------------------+--------------------------+----------------------+
| **5 000-5 150**    |                          |                      |
| AERONAUTICAL       |                          |                      |
| RADIONAVIGATION    |                          |                      |
|                    |                          |                      |
| > S5.367 S5.444    |                          |                      |
| > S5.444A          |                          |                      |
+--------------------+--------------------------+----------------------+

**Reasons:** ITU-R studies to date do not support the need for an
allocation for RNSS at 5 GHz.

#  {#section-2 .unnumbered}

# Proposals for Agenda Item 1.16

## to consider allocations of frequency bands above 71 GHz to the earth-exploration satellite (passive) and radio astronomy services, taking into account Resolution 723

Proposed Changes to Existing Draft Proposal on Agenda Item 1.16

Background Information: The following is a proposed change to the
existing draft proposal on Agenda item 1.16 that was unable to be agreed
to prior to the December CITEL meeting. The change replaces the portion
of the allocation table from 231.5-241 GHz and improves the allocation
status of the FSS within this band while affording greater protection to
the RAS in adjacent bands as well.

Proposal:

+------------+------------------+------------------+------------------+
|            | **GHz**          |                  |                  |
|            |                  |                  |                  |
|            | **231.5 -- 238** |                  |                  |
+------------+------------------+------------------+------------------+
|            | Allocation to    |                  |                  |
|            | Services         |                  |                  |
+------------+------------------+------------------+------------------+
|            | Region 1         | Region 2         | Region 3         |
+------------+------------------+------------------+------------------+
| **USA/ /** | **[231.5]{.u     |                  |                  |
|            | nderline} -- [23 |                  |                  |
| **MOD**    | 2]{.underline}** |                  |                  |
|            | FIXED            |                  |                  |
|            |                  |                  |                  |
|            | ~                |                  |                  |
|            | ~FIXED-SATELLITE |                  |                  |
|            | (s               |                  |                  |
|            | pace-to-Earth)~~ |                  |                  |
|            |                  |                  |                  |
|            | MOBILE           |                  |                  |
|            |                  |                  |                  |
|            | Radiolocation    |                  |                  |
+------------+------------------+------------------+------------------+
| **USA/ /** | **[232]{.und     |                  |                  |
|            | erline} -- 235** |                  |                  |
| **MOD**    | FIXED            |                  |                  |
|            |                  |                  |                  |
|            | FIXED-SATELLITE  |                  |                  |
|            | (space-to-Earth) |                  |                  |
|            |                  |                  |                  |
|            | MOBILE           |                  |                  |
|            |                  |                  |                  |
|            | Radiolocation    |                  |                  |
+------------+------------------+------------------+------------------+
| **USA/ /** | **235 -- 238**   |                  |                  |
|            | EARTH            |                  |                  |
| **MOD**    | EXPLO            |                  |                  |
|            | RATION-SATELLITE |                  |                  |
|            | (passive)        |                  |                  |
|            |                  |                  |                  |
|            | ~~FIXED~~        |                  |                  |
|            |                  |                  |                  |
|            | FIXED-SATELLITE  |                  |                  |
|            | (space-to-Earth) |                  |                  |
|            |                  |                  |                  |
|            | ~~MOBILE~~       |                  |                  |
|            |                  |                  |                  |
|            | SPACE RESEARCH   |                  |                  |
|            | (passive)        |                  |                  |
+------------+------------------+------------------+------------------+
| **USA/ /** | **238 --         |                  |                  |
|            | 24~~1~~[         |                  |                  |
| **MOD**    | 0]{.underline}** |                  |                  |
|            | FIXED            |                  |                  |
|            |                  |                  |                  |
|            | FIXED-SATELLITE  |                  |                  |
|            | (space-to-Earth) |                  |                  |
|            |                  |                  |                  |
|            | MOBILE           |                  |                  |
|            |                  |                  |                  |
|            | [RADIOLOCAT      |                  |                  |
|            | ION]{.underline} |                  |                  |
|            |                  |                  |                  |
|            | [RADIONAVIGAT    |                  |                  |
|            | ION]{.underline} |                  |                  |
|            |                  |                  |                  |
|            | [RADION          |                  |                  |
|            | AVIGATION-SATELL |                  |                  |
|            | ITE]{.underline} |                  |                  |
|            |                  |                  |                  |
|            | ~                |                  |                  |
|            | ~Radiolocation~~ |                  |                  |
+------------+------------------+------------------+------------------+
| **USA/ /** | **[              |                  |                  |
|            | 240]{.underline} |                  |                  |
| **MOD**    | -- 241** FIXED   |                  |                  |
|            |                  |                  |                  |
|            | ~                |                  |                  |
|            | ~FIXED-SATELLITE |                  |                  |
|            | (s               |                  |                  |
|            | pace-to-Earth)~~ |                  |                  |
|            |                  |                  |                  |
|            | MOBILE           |                  |                  |
|            |                  |                  |                  |
|            | [RADIOLOCAT      |                  |                  |
|            | ION]{.underline} |                  |                  |
|            |                  |                  |                  |
|            | ~                |                  |                  |
|            | ~Radiolocation~~ |                  |                  |
+------------+------------------+------------------+------------------+

> **Reasons:** The tables from 231.5 GHz to 241 GHz are to be replaced
> as shown. By eliminating the FSS from the band 231.5-232 GHz, a guard
> band is provided to protect the adjacent radio astronomy service
> allocation. Similarly, the FSS is deleted from the band 240-241 GHz
> for the same reason. In order to compensate the FSS for these changes,
> the FSS allocation from 235-238 GHz, which was deleted in the current
> draft proposal, is reinstated in that band to result in an overall
> contiguous FSS downlink allocation of 8 GHz from 232-240 GHz. So that
> the EESS (passive) does not have the burden of sharing with both the
> FSS and the FS and MS in the 235-238 GHz band, the terrestrial
> services have been eliminated from the band. The overall allocations
> to the FS and MS in the draft proposal are still more than adequate as
> compared with the current allocation tables.

## Proposals for the Work of the Conference

### Modification of RECOMMENDATION 66 (Rev.WRC-97)

**Background Information:** Recommendation 66 is being modified to
reflect the current status of this document. Work has been completed on
space service spurious emissions, so we are proposing the suppression of
*Considering f, recommends 1 and 2* -. We are editing \"*Recognizing
I\"* to conform to the concept in the *recommends* that limits may be
needed for specific situations. We are proposing the suppression of
*Recommends 9* because TG1/5 has concluded that OOB emission limits are
not appropriate at this time.

### RECOMMENDATION 66 (Rev.WRC~~-97~~[2000]{.underline})

**Reasons:** Editorial

Studies of the maximum permitted levels of unwanted emissions

The World Radiocommunication Conference (Geneva, 1997),

> considering

*a)* that Appendix **S3** specifies the maximum permitted levels of
spurious emissions, in terms of the mean power level of any spurious
component supplied by a transmitter to the antenna transmission line;

*b)* that the principal objective of Appendix **S3** is to specify the
maximum permitted levels of spurious emissions that, while being
achievable, provide protection against harmful interference;

*c)* that excessive levels of unwanted emissions may give rise to
harmful interference;

*d)* that while out-of-band emissions can also give rise to harmful
interference, the Radio Regulations do not provide general limits for
these emissions;

*e)* that while Appendix **S3** applies generally to the mean power of a
transmitter and its spurious emissions, it also takes account of a
variety of emissions where interpretation of the term "mean power", and
thus its measurement, would be difficult, particularly in the cases of
digital modulation broadband systems, pulsed modulation and narrow-band
high-power transmitters;

~~*f)* that while Appendix **S3** covers spurious emissions for all
radio services, those listed for space services are included only as
design objectives;~~

**Reasons:** Work has been completed on space service spurious
emissions.

*~~g)~~[f)]{.underline}* that unwanted emissions from transmitters
operating in space stations may cause harmful interference, particularly
emissions from wideband amplifiers which cannot be adjusted after
launch;

*~~h)~~[g)]{.underline}* that unwanted emissions may cause harmful
interference to safety services and radio astronomy and space services
using passive sensors;

**Reason:** Consequential numbering changes

*~~i)~~[h)]{.underline}* that, for technical or operational reasons,
more stringent spurious emission limits than the general limits in
Appendix **S3** may be required to protect specific services, such as
safety services and passive services in specific bands [or
situations]{.underline};

**Reasons:** Edited to conform to the concept in the recommends that
limits may be needed for specific situations.

*~~j)~~[i)]{.underline}* that broadband digital modulation may cause
unwanted emissions at frequencies far from the carrier frequency,

**Reasons:** Consequential numbering change

> noting

*a)* that safety services and passive services have in many cases been
allocated frequencies adjacent or close to those of services employing
high-power transmitters;

*b)* that some administrations have adopted more stringent limits for
spurious emissions than those specified in Appendix **S3**,

> recommends that ITU-R

~~1 study, as a matter of urgency, the question of spurious emissions
resulting from space service transmissions, and, on the basis of those
studies, develop Recommendations for maximum permitted levels of
spurious emissions in terms of mean power of spurious components
supplied by the transmitter to the antenna transmission line;~~

**Reasons:** Work has been completed on space service spurious
emissions.

~~2 submit a report to WRC-99 on the results of its studies with a view
to reviewing and including spurious emission limits for space services
in Appendix **S3**;~~

**Reasons:** Work has been completed on space service spurious
emissions.

~~3~~[1]{.underline} continue the study of spurious emission levels in
all frequency bands, emphasizing the study of those frequency bands,
services and modulation techniques not presently covered by
Appendix **S3**;

**Reason:** Consequential numbering changes

4[2]{.underline} study the question of unwanted emissions resulting from
transmitters of all services and all modulation methods, and, on the
basis of those studies, develop a Recommendation or Recommendations for
maximum permitted levels of spurious emissions and out-of-band
emissions;

**Reason:** Consequential numbering changes

~~5~~[3]{.underline} establish appropriate measurement techniques for
unwanted emissions, where those techniques do not currently exist,
including the determination of reference levels for wideband
transmissions as well as the applicability of reference measurement
bandwidths;

**Reason:** Consequential numbering changes

~~6~~[4]{.underline} study the reasonable boundary of spurious emissions
and out-of-band emissions with a view to defining such a boundary in
Article **S1**;

**Reason:** Consequential numbering changes

~~7~~[5]{.underline} study those frequency bands and instances where,
for technical or operational reasons, more stringent spurious emission
limits than the general limits in Appendix **S3** may be required to
protect safety services and passive services such as radio astronomy,
and the impact on all concerned services of implementing or not
implementing such limits;

**Reason:** Consequential numbering changes

~~8~~[6]{.underline} study those frequency bands and instances where,
for technical or operational reasons, out-of-band limits may be required
to protect safety services and passive services such as radio astronomy,
and the impact on all concerned services of implementing or not
implementing such limits;

**Reason:** Consequential numbering changes

~~9 report to a future competent world radiocommunication conference the
results of studies under *recommends that ITU-R* 3, 4 and 5 above, with
a view to recommending whether or not it is appropriate to include
general limits for out-of-band emissions in the Radio Regulations;~~

**Reasons:** Suppressed because TG1/5 has concluded that OOB emission
limits are not appropriate at this time.

~~10~~[7]{.underline} report the results of studies under *recommends
that ITU-R* ~~6, 7 and 8~~ [4, 5 and 6]{.underline} above to a competent
world radiocommunication conference(s).

**Reason:** Consequential numbering change

## Proposals for the Work of the Conference

### Suppression of Resolutions 60 and 63

**Background Information:** A proposal for the suppression of Resolution
60 is being submitted because this resolution is no longer needed.
Resolution 63 is being suppressed because the work of TG1/2 related to
this resolution has been completed.

~~RESOLUTION 60~~

~~Relating to information on the propagation of radio waves used in the
determination of the coordination area~~

**Reasons:** WP3M provided updated propagation material to TG1/6.
Resolution no longer required.

~~RESOLUTION 63~~

~~Relating to the protection of radiocommunication services against
interference caused by radiation from industrial, scientific\
and medical (ISM) equipment~~

**Reasons:** TG1/2 completed work related to Resolution 63.