Transcript WMO Workshop on Radio Frequencies for Meteorology Meteorological Satellite Services David F. McGinnis U.S.

WMO Workshop on Radio
Frequencies for Meteorology
Meteorological Satellite Services
David F. McGinnis
U.S. Dept. of Commerce, NOAA
7 October 2002
Geneva, Switzerland
Frequency Concerns – Continued
Protection of Existing Metsat
Allocations
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World Radiocommunication Conferences
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WRCs meet about every 3 years to change
the Radio Regulations, including frequency
allocations
Next WRC, in June 2003, has several
agenda items concerning metsat
allocations
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World Radiocommunication
Conference 2003

Agenda Items of interest to Metsat
Communication Links
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
1.20 Additional worldwide allocations below
1 GHz for non-GEO MSS
1.3.1 Additional worldwide allocations
between 1-3 GHz for MSS
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Agenda Item 1.20 Additional
MSS Allocations, <1 GHz

WMO Position
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Oppose all proposals for MSS allocations in
existing metsat bands below 1 GHz
Closely monitor views/proposals from
various regional telecommunication groups
that might support new MSS allocations in
metsat bands, particularly 400.15-403 MHz
and 460-470 MHz
Support existing CPM text
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Agenda Item 1.20 Additional MSS
Allocations, <1 GHz (cont’d)

Draft CPM Text
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Methods to satisfy the agenda item and their
advantages and disadvantages
No additional allocation to accommodate the MSS below 1
GHz.
Advantage: Fully protects the existing services below 1
GHz.
Disadvantage: Does not provide additional MSS spectrum.
Regulatory and procedural considerations -- No
changes are required to the existing provisions in the Radio
Regulations. The Conference may consider the suppression
of Resolution 214 (Rev.WRC-2000).
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Agenda Item 1.20 Additional
MSS Allocations, <1 GHz

U.S. Preliminary View -- Additional
worldwide allocations for shared nonGSO MSS uplink service use should be
made at WRC-03. Studies on sharing
with specific systems were planned for
completion prior to WRC-03, but none
produced
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Agenda Item 1.20 Additional MSS
Allocations, <1 GHz (cont’d)

CITEL Preliminary Views

Canada -- Currently, there are no Canadian
interests for additional allocations on a worldwide
basis for the non-GSO MSS with service links
operating below 1 GHz. Canada does not support
additional allocations on a worldwide basis for the
non-GSO MSS with service links operating below 1
GHz. However, Canada could support the
conversion of the Region 2 MSS allocation (Earthto-space) in the 455-456 MHz and 459-460 MHz
bands to a worldwide allocation subject to
footnotes 5.286A, and with proper modifications
of 5.286B, S5.286C.
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Agenda Item 1.20 Additional MSS
Allocations, <1 GHz (cont’d)

APT Provisional Views
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General: No new allocation can be
supported due to lack of studies in ITU-R
Could reconsider after studies on
interference mitigation are complete
No decision on whether to suppress Res
214 (Rev WRC-2000)
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Agenda Item 1.31 Additional
MSS Allocations 1-3 GHz

WMO Position
 Support Method D in draft CPM text -“...no additional allocations within the
range 1670-1710 MHz to accommodate the
MSS”
 Fall back position, support Method A -- “A
primary worldwide MSS (Earth-to-space)
allocation would be created in the band
1670-1675 MHz, with necessary protection
of existing services.”
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Agenda Item 1.31 Additional MSS
Allocations 1-3 GHz (cont’d)

Draft CPM Text
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Method A -- A primary worldwide MSS (Earth-to-space)
allocation would be created in the band 1 670-1 675 MHz,
with the necessary protection of existing services.
Advantages: The MSS would be provided additional
spectrum. Protection of the few MetSat main earth stations
and radio astronomy stations in the adjacent band will place
little constraint on the MSS. Subject to limited sharing
constraints with MetSat, MetAids, fixed and mobile services,
a global allocation would be available to the MSS (Earth-tospace).
Disadvantages: This allocation would be limited to 5 MHz.
MSS operations may not be possible in the few countries
that continue to use the band 1 670-1 675 MHz for MetAids
operations.
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Agenda Item 1.31 Additional MSS
Allocations 1-3 GHz (cont’d)

Draft CPM Text (cont’d)
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Method B -- In addition to the 5 MHz of spectrum identified
in Method A, an additional allocation, with spectrum of
about 2 MHz, could be created in other bands in the vicinity
of the existing allocations around 1.6 GHz taking into
consideration the conclusions of studies.
Advantages: The spectrum requirement for a total of
7 MHz could be met.
Disadvantages: The MSS will be constrained by the
requirement to protect existing services in some countries in
case sharing proves to be feasible.
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Agenda Item 1.31 Additional MSS
Allocations 1-3 GHz (cont’d)

Draft CPM Text (cont’d)
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Method C -- A worldwide MSS allocation would be created
in the band 1 683-1 690 MHz, taking into account that WRC2000 confirmed the requirement for continued protection of
MetSat and MetAids services under No. 5.377.
Advantages: The MSS would be allocated additional
spectrum.
Disadvantages: In many countries, MSS operations would
be restricted by the operation of a large and increasing
number of MetSat earth stations including transportable
stations. Protection of existing and future MetSat earth
stations would result in a significant coordination burden.
The required separation distances would make large areas
not available for the MSS. Coordination with transportable
MetSat earth stations is not practicable.
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Agenda Item 1.31 Additional MSS
Allocations 1-3 GHz (cont’d)

Draft CPM Text (cont’d)
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Method D -- This option is to make no
additional allocations within the range 1670
to 1710 MHz to accommodate the MSS.
Advantages: This option would ensure
no impact to existing services.
Disadvantages: The spectrum
requirements for MSS would not be met in
this frequency band.
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Agenda Item 1.31 Additional
MSS Allocations 1-3 GHz

U.S. Position
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MSS is not compatible with existing
services in the 1 683-1 690 MHz band and
no additional MSS allocations should be
made in this band. There are no MSS
systems operating in this band, and none
are currently planned. Remove existing
Region 2 allocation for MSS in this band
and suppress footnote 5.377.
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Agenda Item 1.31 Additional MSS
Allocations 1-3 GHz (cont’d)

CITEL Preliminary View

Canada -- Global allocation in the 1 6701675 MHz band could be made to the MSS
(Earth-to-space). This allocation would be
limited to 5 MHz, although the conference
may consider further allocations to satisfy
MSS spectrum requirements while taking
into account protection of other existing
services.
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Agenda Item 1.31 Additional MSS
Allocations 1-3 GHz (cont’d)

CITEL Preliminary View
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Canada (cont’d) -- Does not believe that
Region 2 allocation in the band 1 675-1
710 MHz should be suppressed. However, if
WRC-2003 is successful in granting
additional worldwide MSS allocations, there
may not be a requirement for part of the
existing allocation in the 1 675-1 710 MHz
band
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Agenda Item 1.31 Additional MSS
Allocations 1-3 GHz (cont’d)
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APT Provisional Views
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Need to complete studies between WPs 7D
and 8D regarding protection of Radio
Astronomy Service in 1660-1670 MHz
Need to appropriately protect existing
services if a new allocation is made
Need to know actual number of metsat and
metaid Earth stations in 1670-1675 MHz in
order to make informed decision
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US Preparation Process
International Telecommunication Union (ITU)
188 Nations
Sector Members
ICAO, Red Cross,
IMO, Industry, etc.
International Study
Groups
US State
Department*
Nat’l Telecomm. and Inform.
Admin. (NTIA)
1 vote per
nation
National Committee
Interdept. Radio
Advisory Committee
(IRAC)
Radio Conference Subcommittee
(RCS)
U.S. Government Agencies
Federal Communications Comm.
FCC
WRC
Advisory
Committee
U.S. Working Parties
WP 7B, 7C, 7D, etc.
Informal Working Groups
NOAA, NASA, NSF
Army, Navy, Air Force,
FAA, Dept. of Transportation, etc.
* US WRC Team (typical)
1 Ambassador
160 Official Delegates
-- 20 Fed Govt (1 DoD)
-- 140 Private Sector
Industry
Definition of Terms
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International Telecommunication Union (ITU)
– International organization responsible for
worldwide regulation of use of radio
frequencies
ITU-R – Radio Communication Sector of ITU,
responsible for management of the radio
spectrum used by various services
Study Groups of ITU-R – Responsible for
developing draft recommendations, drafting
technical bases for Radiocommunication
Conferences, and compiling Handbooks
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Definition of Terms, cont’d
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Study Group 7 -- Science Services
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1) Working Party (WP) 7A -- Dissemination,
reception and coordination of standard-frequency
and time-signal services, including the application
of satellite techniques, on a worldwide basis.
2) WP 7B -- Systems for space operation and
space research
3) WP 7C -- Earth exploration and meteorology,
including the related use of links in the intersatellite service.
2) WP 7D Radio astronomy and radar astronomy.
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Definition of Terms, cont’d
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World Radiocommunication Conference
(WRC) – Meeting, occurring about every 3
years, where new spectrum allocations and
revision of radio regulations are approved
Conference Preparatory Meetings (CPM) –
Meetings held prior to WRCs where technical
basis (CPM Report) for next WRC is approved
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