Archived—Proposed Revisions to the Canadian Table of Frequency Allocations (2009 Edition)

Section B: Space Science Services

B1 (AI 1.2) – Allocations and Regulatory Issues related to the Earth Exploratory Space Service (passive), Space Research Service (passive) and Meteorological Satellite (MetSat) Service

B1 - Part (A) Expansion of the MetSat Allocation by 100 MHz Around 18 GHz

Background

Remote sensing of the Earth from space provides the meteorological community with the critical data required to predict the future state of the environment. With the rapid advances in remote sensing technologies, communication systems, computing capabilities and the increased knowledge of the physical processes involved in the development of weather systems, the meteorological community will take advantage of higher resolution data to observe and predict the motion, development and decay of short-term events, such as severe thunderstorms, for appropriate warnings to the general public.

A primary allocation to the geostationary-satellite orbit (GSO) MetSat (space-to-Earth) service already exists in the band 18.1-18.3 GHz based on RRNo. 5.519. However, it is recognized that the bandwidth of the existing allocation is insufficient to support the required data rates. The next generation GSO MetSat systems are expected to have bandwidth requirements up to 300 MHz.

While sharing between GSO MetSat systems and FSS systems is generally feasible, operating MetSat systems below 18.3 GHz would avoid several potential difficulties with High Density Fixed-Satellite Service (HDFSS). Therefore, Canada supported an expansion of the current allocation by an additional 100 MHz below 18.1 GHz to satisfy the high data rate requirement of MetSat.

Summary of Proposed Changes to the Canadian Table

17.8-18.4 GHz

17.8-18.1

FIXED
FIXED-SATELLITE (space-to-Earth) (Earth-to-space) 5.484A 5.516

MOD 5.519 C16D C43

18.1-18.4

FIXED
FIXED-SATELLITE (space-to-Earth) (Earth-to-space) 5.484A
5.516B 5.520

MOD 5.519 C16D C16E C43

MOD 5.519 Additional allocation: the band 18.1-18.3 GHz is also allocated to the meteorological-satellite service (space-to-Earth) on a primary basis. Its use is limited to geostationary satellite and shall be in accordance with the provisions of Article 21, Table 21-4. the bands 18-18.3 GHz in Region 2 and 18.1-18.4 GHz in Regions 1 and 3 are also allocated to the meteorological-satellite service (space-to-Earth) on a primary basis. Their use is limited to geostationary satellites. (WRC-07)

Discussion

The Department believes that the proposed changes to the Canadian Table will satisfy the following needs:

  • the meteorological community will be able to meet its future operational requirement;
  • the fixed service will be protected given that the regulatory measures that currently apply in the existing MetSat allocation in the band 18.1-18.3 GHz will also apply in the expansion band; and
  • the development of HDFSS operating in the band above 18.3 GHz will not be constrained in Region 2, as the MetSat will be operating in the band 18.0-18.3 GHz.

B1 - Part (B) Revision of the Sharing Criteria between Earth Exploration Satellite Service (EESS) (passive) and Fixed and Mobile Services (FS and MS) in the Band 10.60-10.68 GHz

Background

The band 10.6-10.68 GHz is allocated to the passive services on a primary basis, including the EESS (passive), the radio astronomy service (RAS) and the SRS (passive). This band is of prime interest to measure rain, snow, sea state and ocean wind. The retrieved data is part of a set of measurements performed in five interrelated frequency bands (around 6, 10, 18, 24 and 36 GHz). This data is used by and exchanged between meteorological organizations in all Regions.

The 10.6-10.68 GHz band is also allocated to the FS on a primary basis. It is used by the FS for point-to-point and point-to-multipoint systems.

Currently, No. 5.482 limits the equivalent isotropically radiated power (e.i.r.p.) of FS and MS stations in this band to 40 dBW and the transmitter power to –3 dBW, except in the 26 countries listed in the footnote. However, it has been shown that this provision is not sufficient to ensure the protection of the EESS (passive) in the band 10.6-10.68 GHz.

Summary of Proposed Changes to the Canadian Table

10.6-10.68 GHz

10.6-10.68

EARTH EXPLORATION-SATELLITE (passive)
FIXED
RADIO ASTRONOMY
SPACE RESEARCH (passive)

MOD 5.149 MOD 5.482 5.482A

MOD 5.149 See Section F2.
MOD 5.482 In the band 10.6-10.68 GHz, the power delivered to the antenna of stations of the fixed and mobile, except aeronautical mobile, services shall be limited to a maximum equivalent isotropically radiated power of 40 dBW and the power delivered to the antenna shall not exceed dBW. These limitsThis limit may be exceeded, subject to agreement obtained under No. 9.21. However, in Algeria, Saudi Arabia, Armenia, Azerbaijan, Bahrain, Bangladesh, Belarus, China, theEgypt, United Arab Emirates, Georgia, India, Indonesia, Iran (Islamic Republic of), Iraq, JapanJordan, Libyan Arab Jamahiriya, Kazakhstan, Kuwait, Latvia, Lebanon, Morocco, Mauritania, Moldova, Nigeria, Oman, Uzbekistan, Pakistan, the Philippines, Qatar, the Syrian Arab Republic, Kyrgyzstan, Singapore, Tajikistan and, Tunisia, Turkmenistan and Viet Nam, this restriction, the restrictions on the fixed and mobile, except aeronautical mobile, services areservice is not applicable. (WRC-037)
ADD 5.482A   For sharing of the band 10.6-10.68 GHz between the Earth exploration-satellite (passive) service and the fixed and mobile, except aeronautical mobile, services, Resolution 751 (WRC-07) applies. (WRC-07)

Discussion

The Department is of the view that the proposed modifications will provide a good balance between the operational requirements of the passive and active systems, as appropriate protections will be afforded to future EESS (passive) systems without imposing undue constraints to the development of fixed systems.

B1 – Part (C) Development of Sharing Criteria between Earth Exploration-Satellite Service (EESS) (passive) and Fixed and Mobile Services (FS and MS) in the Band 36-37 GHz

Background

The band 36-37 GHz is allocated on a primary basis to the EESS (passive), SRS (passive), FS and MS. The data gathered by EESS (passive) and SRS (passive) systems operating in the band 36-37 GHz contributes to the estimate of total vapour, total cloud liquid water, sea surface wind speed, sea surface temperature, sea ice extent, snow depth and soil moisture content. These parameters are derived from measurements near 7, 10.7, 18.7, 23.8, 50.3, 52.8 and 89 GHz combined with measurements in the 36-37 GHz band.

Without the appropriate regulatory measures, the FS and MS systems could potentially cause interference to the passive services, and the collection of vital scientific information by EESS (passive) systems could be compromised.

Summary of Proposed Changes to the Canadian Table

36-37 GHz

36-37

EARTH EXPLORATION-SATELLITE (passive)
FIXED
MOBILE
SPACE RESEARCH (passive)

MOD 5.149 5.550A

MOD 5.149 See Section F2.
ADD 5.550A For sharing of the band 36-37 GHz between the Earth exploration-satellite (passive) service and the fixed and mobile services, Resolution 752 (WRC-07) shall apply. (WRC-07)

Discussion

The Department is of the view that the mandatory power limits imposed on stations of future fixed and mobile systems, as well as the limitation on some operational characteristics of EESS (passive) systems, will facilitate sharing between future passive and active systems in the band 36-37 GHz without unduly constraining their development.

B2 (AI 1.20) - Protection of Earth Exploratory Space Services (passive) from Unwanted Emissions of Active Services

Background

The compatibility between the EESS (passive) and active services has been discussed since WRC-95. Based on the experience gained from the four previous conferences, WRC-07 was requested to consider the results of the ITU-R compatibility analysis, using band pairs identified in Resolution 738 and the associated proposals for regulatory measures regarding the protection of EESS (passive) from unwanted emissions of active service stations.

In order to address this issue, and taking into consideration the impacts on both the active and the passive services involved, WRC-07 adopted two regulatory measures:

  • impose a limit on the power level of unwanted emissions from the active stations; and
  • recommend compliance with a maximum power level of unwanted emissions from active stations.

Summary of Proposed Changes to the Canadian Table

1 350-1 400 MHz
1 350-1 370 AERONAUTICAL RADIONAVIGATION  5.334
FIXED C5
MOBILE C5
RADIOLOCATION

MOD 5.149 5.334 5.338A

1 370-1 400

FIXED C5
MOBILE C5
RADIOLOCATION

MOD 5.149 5.338A 5.339 5.339A C27 C27A

1 427-1 452 MHz

1 427-1 429

FIXED
SPACE OPERATION (Earth-to-space)

5.338A 5.341

1 429-1 452

FIXED
MOBILE

5.338A 5.339A 5.341 C27A

22.55-23.55 GHz
22.55-23.55 FIXED
INTER-SATELLITE 5.338A
Mobile

MOD 5.149

30-31.3 GHz

30-31

FIXED-SATELLITE (Earth-to-space) 5.338A C49
MOBILE-SATELLITE (Earth-to-space) C50
Standard Frequency and Time Signal-Satellite (space-to-Earth)

31-31.3

FIXED 5.338A
MOBILE
Space Research 5.544
Standard Frequency and Time Signal-Satellite (space-to-Earth)

MOD 5.149

48.2-50.2 GHz

48.2-50.2

FIXED
FIXED-SATELLITE (Earth-to-space) 5.338A 5.516B 5.552
MOBILE

MOD 5.149 5.340 5.555

50.4-52.6 GHz

50.4-51.4

FIXED
FIXED-SATELLITE (Earth-to-space) 5.338A
MOBILE
Mobile-satellite (Earth-to-space)

51.4-52.6

FIXED 5.338A
MOBILE

MOD 5.547 5.556

MOD 5.149 See Section F2.
ADD 5.338A In the bands 1 350-1 400 MHz, 1 427-1 452 MHz, 22.55-23.55 GHz, 30-31.3 GHz, 49.7-50.2 GHz, 50.4-50.9 GHz and 51.4-52.6 GHz, Resolution 750 (WRC-07) applies. (WRC-07)
SUP 5.339A See Section C2.
MOD 5.547 See Section F2.
SUP C27A   See Section C2.

Discussion

After extensive discussion at WRC-07, Resolution 750 (WRC-07) was adopted in an effort to balance the interests of both the EESS (passive) and the active services and to ensure compatibility between these services in some specified band pairs. The Department believes that, with these regulatory measures, collection of vital scientific information through EESS (passive) systems will be protected without putting undue constraint on the deployment and the development of active services in the adjacent bands.

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