47 CFR 25.223 - Off-axis EIRP spectral density limits for feeder link earth stations in the 17/24 GHz BSS.

§ 25.223 Off-axis EIRP spectral density limits for feeder link earth stations in the 17/24 GHz BSS.
(a) This section applies to all applications for earth station licenses in the 17/24 GHz BSS frequency bands, except for applications in which the proposed antenna does not conform to the standards of §§ 25.209(a) and (b), and/or the proposed power density levels are in excess of those specified in § 25.212(f) of this part.
(b) All applications for earth station licenses in the 24.75-25.25 GHz portion of 17/24 GHz BSS shall be routinely processed if they meet the following requirements:
(1) 17/24 GHz BSS earth station antenna off-axis EIRP spectral density for co-polarized signals shall not exceed the following values, within ±3° of the GSO arc, under clear sky conditions:
32.5-25log(θ) dBW/MHz for 2° ≤ θ ≤ 7°
11.4 dBW/MHz for 7° ≤ θ ≤ 9.2°
35.5-25log(θ) dBW/MHz for 9.2° ≤ θ ≤ 48°
3.5 dBW/MHz for 48° ≤ θ ≤ 180°
Where θ is the angle in degrees from the axis of the main lobe.
(2) 17/24 GHz BSS earth station antenna off-axis EIRP spectral density for co-polarized signals shall not exceed the following values, for all directions other than within ±3° of the GSO arc, under clear sky conditions:
35.5-25log(θ) dBW/MHz for 2° ≤ θ ≤ 7°
14.4 dBW/MHz for 7° ≤ θ ≤ 9.2°
38.5-25log(θ) dBW/MHz for 9.2° ≤ θ ≤ 48°
6.5 dBW/MHz for 48° ≤ θ ≤ 180°
Where θ is the angle in degrees from the axis of the main lobe.
(3) The values given in paragraphs (b) (1) and (2) of this section may be exceeded by 3 dB, for values of θ > 10°, provided that the total angular range over which this occurs does not exceed 20° when measured along both sides of the GSO arc.
(4) 17/24 GHz BSS earth station antenna off-axis EIRP spectral density for cross-polarized signals shall not exceed the following values, in all directions greater than 3 relative to the GSO arc, under clear sky conditions:
22.5-25log(θ) dBW/MHz for 2° ≤ θ ≤ 7°
1.4 dBW/MHz for 7° ≤ θ ≤ 9.2°
Where is the angle in degrees from the axis of the main lobe.
(c) Notwithstanding § 25.220 of this part, each applicant for earth station license(s) that proposes levels in excess of those defined in paragraph (b) of this section shall:
(1) Submit link budget analyses of the operations proposed along with a detailed written explanation of how each uplink and each transmitted satellite carrier density figure is derived;
(2) Submit a narrative summary which must indicate whether there are margin shortfalls in any of the current baseline services as a result of the addition of the applicant's higher power service, and if so, how the applicant intends to resolve those margin short falls;
(3) Certify that all potentially affected parties acknowledge and do not object to the use of the applicant's higher power densities. For proposed power levels less than or equal to 3 dB in excess of the limits defined above, the affected parties shall be those co-frequency U.S. licensed 17/24 GHz BSS satellite networks that are located at angular separations of up to ±6° away; for power levels greater than 3 dB and less than or equal to 6 dB in excess of the limits defined above, affected parties shall be all those co-frequency U.S. licensed operators at up to ±10° away. No power levels greater than 6 dB in excess of the limits defined above shall be permitted.
(d) Licensees authorized pursuant to paragraph (c) of this section shall bear the burden of coordinating with any future applicants or licensees whose proposed compliant operations at 10 degrees or smaller orbital spacing, as defined by paragraph (b) of this section, is potentially or actually adversely affected by the operation of the non-compliant licensee. If no good faith agreement can be reached, however, the non-compliant licensee shall reduce its earth station EIRP spectral density levels to be compliant with those specified in paragraph (b) of this section.
(e) For earth stations employing uplink power control, the values in paragraphs (b) (1), (2), and (4) of this section may be exceeded by up to 20 dB under conditions of uplink fading due to precipitation. The amount of such increase in excess of the actual amount of monitored excess attenuation over clear sky propagation conditions shall not exceed 1.5 dB or 15% of the actual amount of monitored excess attenuation in dB, whichever is larger, with a confidence level of 90 percent except over transient periods accounting for no more than 0.5% of the time during which the excess is no more than 4.0 dB.
[72 FR 50030, Aug. 29, 2007]
Beta! The text on the eCFR tab represents the unofficial eCFR text at ecfr.gov.
§ 25.223 Alternative licensing rules for feeder-link earth stations in the 17/24 GHz BSS.

(a) This section applies to license applications for earth stations that transmit to 17/24 GHz Broadcasting-Satellite Service space stations that are not eligible for routine processing under § 25.212(f).

(b) All applications for earth station licenses in the 24.75-25.25 GHz portion of 17/24 GHz BSS shall be routinely processed if they meet the following requirements:

(1) 17/24 GHz BSS earth station antenna off-axis EIRP spectral density for co-polarized signals shall not exceed the following values, within ±3° of the GSO arc, under clear sky conditions:

32.5-25log(θ) dBW/MHz for 2° ≤θ ≤7°
11.4 dBW/MHz for 7° ≤θ ≤9.2°
35.5-25log(θ) dBW/MHz for 9.2° ≤θ ≤48°
3.5 dBW/MHz for 48° ≤θ ≤180°

Where θ is the angle in degrees from the axis of the main lobe.

(2) 17/24 GHz BSS earth station antenna off-axis EIRP spectral density for co-polarized signals shall not exceed the following values, for all directions other than within ±3° of the GSO arc, under clear sky conditions:

35.5-25log(θ) dBW/MHz for 2° ≤θ ≤7°
14.4 dBW/MHz for 7° ≤θ ≤9.2°
38.5-25log(θ) dBW/MHz for 9.2° ≤θ ≤48°
6.5 dBW/MHz for 48° ≤θ ≤180°

Where θ is the angle in degrees from the axis of the main lobe.

(3) The values given in paragraphs (b) (1) and (2) of this section may be exceeded by 3 dB, for values of θ >10°, provided that the total angular range over which this occurs does not exceed 20° when measured along both sides of the GSO arc.

(4) 17/24 GHz BSS earth station antenna off-axis EIRP spectral density for cross-polarized signals shall not exceed the following values, in all directions greater than 3 relative to the GSO arc, under clear sky conditions:

22.5-25log(θ) dBW/MHz for 2° ≤θ ≤7°
1.4 dBW/MHz for 7° ≤θ ≤9.2°

Where is the angle in degrees from the axis of the main lobe.

(c) Each earth station license applicant that proposes levels in excess of those defined in paragraph (b) of this section must certify that all potentially affected parties acknowledge and do not object to the use of the applicant's higher power densities. For proposed power density levels less than or equal to 3 dB in excess of the limits defined in paragraph (b) of this section, the potentially affected parties are operators of co-frequency U.S.-authorized 17/24 GHz BSS satellites at angular separations of up to ±6° from the proposed satellite points of communication; for power density levels greater than 3 dB and less than or equal to 6 dB in excess of the limits defined in paragraph (b) of this section, potentially affected parties are operators of co-frequency U.S.-authorized satellites up to ±10° from the proposed satellite points of communication. Power density levels greater than 6 dB in excess of the limits defined in paragraph (b) of this section will not be permitted.

(d) Licensees authorized pursuant to paragraph (c) of this section shall bear the burden of coordinating with any future applicants or licensees whose proposed compliant operations at 10 degrees or smaller orbital spacing, as defined by paragraph (b) of this section, is potentially or actually adversely affected by the operation of the non-compliant licensee. If no good faith agreement can be reached, however, the non-compliant licensee shall reduce its earth station EIRP spectral density levels to be compliant with those specified in paragraph (b) of this section.

[72 FR 50030, Aug. 29, 2007, as amended at 79 FR 8324, Feb. 12, 2014]

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].

It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.


United States Code

Title 47 published on 2015-10-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 47 CFR Part 25 after this date.

  • 2015-11-06; vol. 80 # 215 - Friday, November 6, 2015
    1. 80 FR 68815 - Review of Foreign Ownership Policies for Broadcast, Common Carrier and Aeronautical Radio Licensees
      GPO FDSys XML | Text
      FEDERAL COMMUNICATIONS COMMISSION
      Proposed rule.
      Submit comments on or before December 21, 2015, and replies on or before January 20, 2016. The NPRM contains potential information collection requirements subject to the PRA, Public Law 104-13. OMB, the general public, and other Federal agencies are invited to comment on the potential new and modified information collection requirements contained in this NPRM. If the information collection requirements are adopted, the Commission will submit the appropriate documents to OMB for review under Section 3507(d) of the PRA. OMB, the general public, and other Federal agencies will again be invited to comment on the new and modified information collection requirements adopted by the Commission.
      47 CFR Parts 1, 25, 73, and 74