SRSP-101 — Technical Requirements for Fixed Earth Stations Operating Above 1 GHz in Space Radiocommunication Services and Earth Stations on board Vessels (ESVs) Operating in the Fixed-Satellite Service

SRSP-101
Issue 2
August 2019

 

Preface

Issue 2 of SRSP-101 is hereby released principally to provide an update on the specifications of equivalent isotropically radiated power (e.i.r.p.) density in certain bands and harmonize with other jurisdictions. This SRSP replaces SRSP-101, issue 1.

The following are the main changes:

  1. In annex A, sections 2.5 and 2.6, the off-axis e.i.r.p. density limits have been changed to remove the discontinuity that currently exists at 48°.
  2. In annex A, section 2.6, changes were made to express the e.i.r.p. density in dBW/MHz instead of dBW/40kHz for the frequency band 27.5–30 GHz.
  3. In annex B, the title has been modified to clarify that the annex applies only to earth stations operating with geostationary satellite orbit satellites.
  4. In annex B, the corresponding antenna patterns of annex A sections 2.5 and 2.6 have been modified.
  5. In section 1, a note has been added to inform that this SRSP can also be used in evaluating the technical component of applications for earth stations in motion operating in the fixed satellite service until such time as an appropriate SRSP is developed.
  6. Stylistic changes have been made throughout the document to conform to Canada.ca style.

Issued under the authority of
the Minister of Innovation, Science and Economic Development

Martin Proulx
Director General
Engineering, Planning and Standards Branch

1. Intent

This Standard Radio System Plan (SRSP) states the minimum technical requirements for fixed earth stationsFootnote 1 operating above 1 GHz in any space radiocommunication service, other than mobile-satellite and amateur-satellite services, and also for earth stations on board vessels (ESVs) operating in the fixed-satellite service. This SRSP is intended to be used in evaluating the technical component of applications for new or modified earth stations submitted in accordance with the current issue of Client Procedures Circular CPC-2-6-01, Procedure for the Submission of Applications to License Fixed Earth Stations and to Approve the Use of Foreign Satellites in Canada. This SRSP is also to be used for ESVs operating in the fixed satellite service that are covered under Client Procedures Circular CPC-2-6-06, Guidelines for the Submission of Applications to Provide Mobile-Satellite Service in Canada. Until such time as a more specific SRSP may be developed, this SRSP will also be used as appropriate in evaluating the technical component of applications for earth stations in motion (ESIM) operating in the fixed satellite service.

This SRSP replaces the technical requirements set out in Radio Standards Procedures RSP-114, Licence Application Procedure for Planned Earth Stations in Space Radiocommunication Services, and RSP-116, Licence Application Procedure for Planned Television and/or Radio Receive Only (TVRO) Earth Stations in the Fixed satellite Service. With the release of issue 1 of SRSP-101, RSP-114 and RSP-116 are rescinded.

Existing earth stations that were authorized prior to the issuance of this SRSP may continue to operate with their current technical characteristics. However, new earth stations being deployed or modifications made to existing earth stations will need to conform to the requirements of this SRSP.

This SRSP specifies system characteristics relating to efficient spectrum usage only and is not to be regarded as a comprehensive specification for equipment design and/or selection.

The technical requirements stated in section 4 of this SRSP only apply to earth stations operating within specific space radiocommunication services, as stated for each requirement. In cases where earth stations will operate in a space radiocommunication service where technical requirements of this SRSP do not apply, Innovation, Science and Economic Development Canada (ISED) may establish alternate requirements on a case-by-case basis.

2. General

Earth stations that conform to these technical requirements will be given priority in licensing over non-standard earth stations operating in the same band.

The arrangements for non-standard systems are outlined in Spectrum Utilization Policy SP-GEN, General Information Related to Spectrum Utilization and Radio Systems Policies.

Although an earth station may conform to the requirements of this SRSP, modifications to that earth station may be required whenever harmful interferenceFootnote 2 is caused.

It should be noted that earth stations may operate in frequency bands, which are shared with other stations operating in the same service and other services that operate in accordance with the Canadian Table of Frequency Allocations and spectrum utilization policies. Domestic and international coordination with these other stations may be required.

3. Related documents

4. Technical requirements for earth stations

The technical requirements stated in this section only apply to earth stations operating within the space radiocommunication services specified.

4.1 Power limitations for space radiocommunication services in frequency bands shared with terrestrial services in Canada

For space services sharing frequency bands above 1 GHz with terrestrial services, the equivalent isotropically radiated power (e.i.r.p.) transmitted in any direction towards the horizon by an earth station shall not exceed the following limits:

  1. in frequency bands between 1 GHz and 15 GHz
    +40 dBW in any 4 kHz band for θ ≤ 0°
    +40 + 3θ dBW in any 4 kHz band for 0° < θ ≤ 5°
  2. in frequency bands above 15 GHz
    +64 dBW in any 1 MHz band for θ ≤ 0°
    +64 + 3θ dBW in any 1 MHz band for 0° < θ ≤ 5°

  3. where θ is the angle of elevation of the horizon viewed from the centre of the radiation of the antenna of the earth station and measured in degrees as positive above the horizontal plane and negative below it.

These limits apply to earth stations operating in any of the space services and frequency bands shown in table 1, where the frequency bands are shared with equal rights with the fixed or mobile service.

Table 1 — List of frequency bands shared between space and terrestrial services
Frequency bands shared between terrestrial and space services Space services operating within listed frequency bands
2025–2110 MHz
5850–7075 MHz
7190–7235 MHz
7900–8400 MHz
12.7–12.75 GHz
12.75–13.25 GHz
17.7–18.1 GHz
22.55–23.15 GHz
25.05–25.25 GHz
27–29.5 GHz
Earth-exploration
Fixed-satellite
Meteorological-satellite
Space operation
Space research

Note: Not all the listed space services operate in every listed frequency band.

For angles of elevation of the horizon greater than 5°, there shall be no restriction as to the e.i.r.p. transmitted by an earth station towards the horizon.

4.2 Power stability for space radiocommunication services

For each earth station, the power output level of the amplifier shall remain within ±1 dB of its nominal setting.

4.3 Frequency tolerance for space radiocommunication services

For each earth station, the frequency tolerance from nominally assigned frequencies of the earth station shall be within:

  • ±0.002% for frequencies below 2.45 GHz
  • ±0.005% for frequencies between 2.45 GHz and 10.5 GHz
  • ±0.01% for frequencies between 10.5 GHz and 40 GHz

4.4 Emission limits for space radiocommunication services

For any frequency removed from the assigned channel centre frequency by more than 250% of the necessary bandwidth, the mean power of emission shall be attenuated by 43 + 10 log (total mean power in watts) dBc or 60 dBc relative to the full carrier power in the assigned channel in any 4 kHz reference bandwidth, whichever is less stringent. In the case of multiple carriers from a single amplifier, the emission limits apply to each carrier.

The term dBc is the number of decibels relative to the unmodulated carrier power of the emission. In cases where it is not possible to measure the carrier, the reference level equivalent to the dBc level is the number of decibels relative to the mean power. The emission limits apply to all emissions, including harmonic emissions, intermodulation products, frequency conversion products and parasitic emissions.

The total mean power is the average power in watts supplied to the antenna transmission line by a power amplifier during a sufficiently long interval of time compared with the lowest frequency encountered in the modulation taken under normal operating conditions. When burst transmission is used, the mean power P and the mean power of any spurious domain emissions are measured using power averaging over the burst duration.

4.5 Receiver spurious emission limits for space radiocommunication services

Receiving earth stations may not emit electromagnetic waves that have a field strength greater than that which would occur if the stations were replaced by an isotropic transmitter of five nanowatts.

4.6 Off-axis e.i.r.p. density limits for earth stations operating with geostationary satellites in the fixed-satellite service

The limits described in annex A shall apply. Annex C illustrates how to calculate the power density in a reference bandwidth.

4.7 Antenna gain patterns for earth stations operating with geostationary satellites in the fixed-satellite service

The antenna gains described in annex B shall apply.

5. Coordination

The coordination of earth stations with respect to space stations of other space networks is addressed when the space networks are coordinated. When the coordination of earth stations is required with terrestrial networks and/or earth stations of other space networks operating in the opposite direction of transmission, the domestic and international coordination requirements are contained in CPC-2-6-01, Procedure for the Submission of Applications to License Fixed Earth Stations and to Approve the Use of Foreign Satellites in Canada, and in the case of ESVs, CPC-2-6-06, Guidelines for the Submission of Applications to Provide Mobile-Satellite Service in Canada.

Actual transmit and receive parameters shall be used where possible for coordination with terrestrial networks rather than the envelopes illustrated in annexes A and B.

Annex A: Off-axis equivalent isotropically radiated power (e.i.r.p.) density limits for earth stations operating with geostationary satellites in the fixed-satellite service

The following off-axis equivalent isotropically radiated power (e.i.r.p.) density limits, under clear sky conditions, shall be observed (see note A1). These limits can normally be met by a transmitting antenna whose pattern complies with one of those in annex B, as appropriate. For antennas not complying with the limits in annex B, the input power of the station needs to be reduced to meet the limits contained herein. The off-axis angle is defined as the angle between the direction of interest and the axis of the main lobe. The e.i.r.p. density for any angle of rotation about the boresight axis must meet the specified e.i.r.p. density limits. Several notes at the end of this annex provide additional information on the application of these limits.

1. For earth stations installed prior to January 1, 1986, and not modified since that date (see notes A2 and A3):

1.1 For earth stations operating in the frequency band 5925–6425 MHz:

Maximum e.i.r.p. density

35 - 25 log ɸ dBW/4 kHz
-7 dBW/4 kHz

Off-axis angle, ɸ

1° ≤ ɸ < 48°
48° ≤ ɸ ≤ 180°

1.2 For earth stations operating in the frequency band 13.75–14.5 GHz:

Maximum e.i.r.p. density

38 - 25 log ɸ dBW/4 kHz
-4 dBW/4 kHz

Off-axis angle, ɸ

1° ≤ ɸ < 48°
48° ≤ ɸ ≤ 180°

2. For all earth stations installed or modified on or after January 1, 1986 (see notes A2, A3, A6 and A8):

2.1 For earth stations operating in the frequency band 5925–6425 MHz, other than those considered in section 2.2 of this annex, the e.i.r.p. density in any direction within ±3° of the GSO shall not exceed the following values:

Maximum e.i.r.p. density

32 - 25 log ɸ dBW/4 kHz
11 dBW/4 kHz
35 - 25 log ɸ dBW/4 kHz
-7 dBW/4 kHz

Off-axis angle, ɸ

2.5° ≤ ɸ < 7°
7° ≤ ɸ < 9.2°
9.2° ≤ ɸ < 48°
48° ≤ ɸ ≤ 180°

2.2 For earth stations located on board vessels (ESVs) operating in the frequency band 5925–6425 MHz (see notes A4 and A5):

i. For co-polarized signals, the e.i.r.p. density emitted from the ESV in the plane of the GSO shall not exceed the following values:

Maximum e.i.r.p. density

26.3 - 25 log ɸ dBW/4 kHz
5.3 dBW/4 kHz
29.3 - 25 log ɸ dBW/4 kHz
-12.7 dBW/4 kHz

Off-axis angle, ɸ

1° ≤ ɸ < 7°
7° ≤ ɸ < 9.2°
9.2° ≤ ɸ < 48°
48° ≤ ɸ ≤ 180°

ii. For co-polarized signals, the e.i.r.p. density emitted from the ESV in all other directions shall not exceed the following values:

Maximum e.i.r.p. density

29.3 - 25 log ɸ dBW/4 kHz
-12.7 dBW/4 kHz

Off-axis angle, ɸ

1° ≤ ɸ < 48°
48° ≤ ɸ ≤ 180°

iii. For cross-polarized signals, the e.i.r.p. density emitted from the ESV in all directions shall not exceed the following values:

Maximum e.i.r.p. density

16.3 - 25 log ɸ dBW/4 kHz
-4.7 dBW/4 kHz

Off-axis angle, ɸ

1.8° ≤ ɸ < 7°
7° ≤ ɸ ≤ 9.2°

2.3 For earth stations operating in the frequency band 13.75–14.5 GHz other than those considered below in section 2.4 of this annex, the e.i.r.p. density in any direction within ±3° of the GSO shall not exceed the following values:

Maximum e.i.r.p. density

39 - 25 log ɸ dBW/40 kHz
18 dBW/40 kHz
42 - 25 log ɸ dBW/40 kHz
0 dBW/40 kHz

Off-axis angle, ɸ

2.5° ≤ ɸ < 7°
7° ≤ ɸ < 9.2°
9.2° ≤ ɸ < 48°
48° ≤ ɸ ≤ 180°

2.4 For earth stations located on board vessels operating in the frequency band 14–14.5 GHz (see notes A4 and A5):

i. For co-polarized signals, the e.i.r.p. density emitted from the ESV in the plane of the GSO shall not exceed the following values:

Maximum e.i.r.p. density

15 - 25 log ɸ dBW/4 kHz
-6 dBW/4 kHz
18 - 25 log ɸ dBW/4 kHz
-24 dBW/4 kHz

Off-axis angle, ɸ

1.25° ≤ ɸ < 7°
7° ≤ ɸ < 9.2°
9.2° ≤ ɸ < 48°
48° ≤ ɸ ≤ 180°

ii. For co-polarized signals, the e.i.r.p. density emitted from the ESV in all other directions shall not exceed the following values:

Maximum e.i.r.p. density

18 - 25 log ɸ dBW/4 kHz
-24 dBW/4 kHz

Off-axis angle, ɸ

1.25° ≤ ɸ < 48°
48° ≤ ɸ ≤ 180°

iii. For cross-polarized signals, the e.i.r.p. density emitted from the ESV in all directions shall not exceed the following values:

Maximum e.i.r.p. density

5 - 25 log ɸ dBW/4 kHz
-16 dBW/4 kHz

Off-axis angle, ɸ

1.8° ≤ ɸ < 7°
7° ≤ ɸ ≤ 9.2°

2.5 For earth stations operating in the frequency band 24.75–25.25 GHz:

i. For co-polarized signals, the e.i.r.p. density in any direction within ±3° of the GSO shall not exceed the following values:

Maximum e.i.r.p. density

32.5 - 25 log ɸ dBW/MHz
11.4 dBW/MHz
35.5 - 25 log ɸ dBW/MHz
3.5 dBW/MHz

Off-axis angle, ɸ

2° ≤ ɸ < 7°
7° ≤ ɸ < 9.2°
9.2° ≤ ɸ < 19.05°
19.05° ≤ ɸ ≤ 180°

ii. For co-polarized signals, the e.i.r.p. density for all directions other than within ±3° of the GSO shall not exceed the following values:

Maximum e.i.r.p. density

35.5 - 25 log ɸ dBW/MHz
14.4 dBW/MHz
38.5 - 25 log ɸ dBW/MHz
6.5 dBW/MHz

Off-axis angle, ɸ

2° ≤ ɸ < 7°
7° ≤ ɸ < 9.2°
9.2° ≤ ɸ < 19.05°
19.05° ≤ ɸ ≤ 180°

iii. For cross-polarized signals, the e.i.r.p. density in all directions other than within ±3° relative to the GSO shall not exceed the following values:

Maximum e.i.r.p. density

22.5 - 25 log ɸ dBW/MHz
1.4 dBW/MHz

Off-axis angle, ɸ

2° ≤ ɸ < 7°
7° ≤ ɸ < 9.2°

2.6 For earth stations operating in the frequency band 27.5–30 GHz (see note A7):

i. For co-polarized signals, the e.i.r.p. density in any direction within ±3° of the GSO shall not exceed the following values:

Maximum e.i.r.p. density

32.5 - 25 log ɸ dBW/MHz
11.37 dBW/MHz
35.5 - 25 log ɸ dBW/MHz
3.5 dBW/MHz

Off-axis angle, ɸ

2° ≤ ɸ < 7°
7° ≤ ɸ < 9.23°
9.23° ≤ ɸ < 19.05°
19.05° ≤ ɸ ≤ 180°

ii. For co-polarized signals, the e.i.r.p. density for all directions other than within ±3° of the GSO shall not exceed the following values:

Maximum e.i.r.p. density

35.5 - 25 log ɸ dBW/MHz
14.37 dBW/MHz
38.5 - 25 log ɸ dBW/MHz
6.5 dBW/MHz

Off-axis angle, ɸ

3.5° ≤ ɸ < 7°
7° ≤ ɸ < 9.23°
9.23° ≤ ɸ < 19.05°
19.05° ≤ ɸ ≤ 180°

iii. For cross-polarized signals, the e.i.r.p. density in all directions relative to the GSO arc shall not exceed the following values:

Maximum e.i.r.p. density

22.5 - 25 log ɸ dBW/MHz
1.37 dBW/MHz

Off-axis angle, ɸ

2° ≤ ɸ < 7°
7° ≤ ɸ ≤ 9.23°

Note A1:

For operations at frequencies above 10 GHz, earth station operators may exceed the uplink e.i.r.p. density limits specified under the conditions of uplink fading due to precipitation by an amount not to exceed 1 dB above the actual amount of monitored excess attenuation over clear sky propagation conditions. The e.i.r.p. density levels shall be returned to normal as soon as the attenuating weather pattern subsides. The maximum power level for power control purposes shall be coordinated between and among adjacent satellite operators.

Note A2:

For any direction outside of ±3° from the GSO, the limits in sections 1.1 and 1.2 of this annex shall apply, unless specified otherwise.

Note A3:

For off-axis angles ɸ > 7°, the limits shall not be exceeded by more than 10% of the earth station antenna side-lobes provided that no individual side-lobe exceeds the limits given by more than 3 dB.

Note A4:

For non-circular ESV antennas, the major axis of the antenna should be aligned with the tangent to the GSO arc at the target satellite point, to the extent required to meet specified off-axis e.i.r.p. criteria.

Note A5:

ESVs are allowed to operate in the specified FSS frequency bands within the limits specified and on the condition that the use of such frequencies shall not cause harmful interference to an authorized station.

Note A6:

For systems where more than one earth station is expected to transmit simultaneously in the same bandwidth, the e.i.r.p. density limit should be reduced by 10 log10 (M), where M is the maximum number of simultaneously transmitting co-frequency earth stations in the receive beam of the satellite.

Note A7:

Earth stations operating in the frequency band 27.5–30 GHz that have lower elevation angles to the GSO will require higher e.i.r.p. density levels relative to the same terminals at higher elevation angles to achieve the same power flux densities at the GSO. This is due to the combined effect of increased distance and atmospheric absorption. Earth stations with low elevation angles may exceed the levels specified in section 2.6 of this annex by the following amount:

Increase in e.i.r.p. density

2.5 dB
3 — 0.11ε

Elevation angle to GSO, ε

ε ≤ 5°
5° ≤ ε ≤ 30°

Note A8:

For earth stations that operate in bands not shared with terrestrial stations, the e.i.r.p. density limit can be relaxed by 10 dB in the back lobe, i.e. for off-axis angles between 85° and 180°.

Annex B: Antenna gain patterns for earth stations operating with geostationary satellites in the fixed-satellite service

For coordination purposes, it will be assumed that the antenna gain within 3° of the geostationary satellite orbit (GSO) is described by the following expressions in sections 1 to 3 of this annex as applicable. The off-axis angle is defined as the angle between the direction of interest and the axis of the main lobe. The measured radiation pattern for any angle of rotation about the boresight axis must meet the specified radiation pattern envelope. Several notes at the end of this annex provide additional guidelines on the application of these antenna gains.

1. For earth stations that operate in frequency bands shared with terrestrial stations:

Gain

29 – 25 log ɸ dBi
7.9 dBi
32 – 25 log ɸ dBi
–10 dBi

Off-axis angle, ɸ

1.5° ≤ ɸ < 7°
7° ≤ ɸ < 9.2°
9.2° ≤ ɸ < 48°
48° ≤ ɸ ≤ 180°

or

Gain

29 – 25 log ɸ dBi
7.9 dBi
32 – 25 log ɸ dBi
0 dBi

Off-axis angle, ɸ

2° ≤ ɸ < 7°
7° ≤ ɸ < 9.2°
9.2° ≤ ɸ < 19.05°
19.05° ≤ ɸ ≤ 180°

as applicable in accordance with the relevant sections in annex A.

2. For earth stations that operate in frequency bands not shared with terrestrial stations:

Gain

29 – 25 log ɸ dBi
7.9 dBi
32 – 25 log ɸ dBi
–10 dBi
0 dBi

Off-axis angle, ɸ

1.5° ≤ ɸ < 7°
7° ≤ ɸ < 9.2°
9.2° ≤ ɸ < 48°
48° ≤ ɸ ≤ 180°
85° ≤ ɸ ≤ 180°

3. For television receive only (TVRO) earth stations in the frequency band 3700–4200 MHz, the protection antenna pattern requirements are:

Gain

34.5 – 25 log ɸ dBi
–7 dBi

Off-axis angle, ɸ

5° ≤ ɸ < 46°
46° ≤ ɸ ≤ 180°

4. For angles more than 3° away from the GSO, the gain will be assumed to be:

Gain

32 – 25 log ɸ dBi
–10 dBi

Off-axis angle, ɸ

1.5° ≤ ɸ < 48°
48° ≤ ɸ ≤ 180°

or

Gain

32 – 25 log ɸ dBi
10.9 dBi
35 – 25 log ɸ dBi
3 dBi

Off-axis angle, ɸ

2° ≤ ɸ < 7°
7° ≤ ɸ < 9.2°
9.2° ≤ ɸ < 19.05°
19.05° ≤ ɸ ≤ 180°

as applicable in accordance with the relevant sections in annex A.

Note B1:

Where earth station antennas have gain patterns which are better than those shown (i.e. lower off-axis gain), the actual pattern may be used for coordination purposes.

Note B2:

The gain is considered in the plane of the GSO as it appears at the particular earth station.

Note B3:

The envelope may be exceeded by no more than 10% of the side-lobes provided that no individual side-lobe exceeds the gain envelope given by more than 3 dB.

Note B4:

In the frequency band 3700–4200 MHz, licences to operate protected TVRO earth stations will only be issued if the antenna radiation pattern is such that 90% of the side-lobe peaks fall within the envelope given in section 3 of this annex.

Annex C: Equivalent isotropically radiated power (e.i.r.p.) density in a reference bandwidth for digital carriers

The following equations show how to average an e.i.r.p. density over a different reference bandwidth, as required in annex A, for a digital carrier.

It may be necessary to convert the e.i.r.p. density value to a different reference bandwidth, e.g. 4 kHz, 40 kHz or 1 MHz. The following methods should be applied, where:

EIRPDW/Hz = e.i.r.p. density, W/Hz, of the digital carrier
Bc = carrier bandwidth, expressed in Hz
Br = reference bandwidth, which could be 4 kHz, 40 kHz, or 1 MHz, expressed in hertz.

Case 1: Bc < Br

EIRPDW/Br = EIRPDW/Hz × Bc (watts per reference bandwidth, Br, e.g. W/4kHz, W/40 kHz, or W/1MHz)

Case 2: Bc ≥ Br, then

EIRPDW/Br = EIRPDW/Hz × Br (watts per reference bandwidth, Br)

Note that this assumes that the power of the digital carrier is uniformly spread over the concerned frequency band.

Date modified: