§ 25.138   Licensing requirements for GSO FSS Earth Stations in the 18.3-18.8
GHz (space-to-Earth), 19.7-20.2 GHz (space-to-Earth), 28.35-28.6 GHz
(Earth-to-space), and 29.25-30.0 GHz (Earth-to-space) bands.

   (a) Applications for earth station licenses in the GSO FSS in the
   18.3-18.8 GHz, 19.7-20.2 GHz, 28.35-28.6 GHz, and 29.25-30.0 GHz bands
   that indicate that the following requirements will be met and include
   the information required by paragraph (d) of this section will be
   routinely processed:

   (1) GSO FSS earth station antenna off-axis EIRP spectral density for
   co-polarized signals shall not exceed the following values, within
   +-3DEG of the GSO arc, under clear sky conditions:
   18.5-25log(th)-10log(N) dBW/40kHz for 2.0DEG <=th <=7DEG
   -2.63-10log(N)          dBW/40kHz for 7DEG <=th <=9.23DEG
   21.5-25log(th)-10log(N) dBW/40kHz for 9.23DEG <=th <=48DEG
   -10.5-10log(N)          dBW/40kHz for 48DEG 10DEG, provided that the total
   angular range over which this occurs does not exceed 20DEG when
   measured along both sides of the GSO arc.

   (4) GSO FSS earth station antenna off-axis EIRP spectral density for
   cross-polarized signals shall not exceed the following values, in all
   directions relative to the GSO arc, under clear sky conditions:
   8.5-25log(th)-10log(N) dBW/40 kHz For 2.0DEG 25.208 (d).

   (b) An applicant proposing levels in excess of those specified in
   paragraph (a) of this section must certify that operators of all
   co-frequency GSO FSS space stations within 6 degrees of the proposed
   satellite point(s) of communication are aware of the applicant's
   proposal to operate with the higher power densities and have stated
   that they have no objection to such operation.

   (c) Licensees authorized pursuant to paragraph (b) of this section
   shall bear the burden of coordinating with any future applicants or
   licensees whose proposed compliant operations at 6 degrees or smaller
   orbital spacing, as defined by paragraph (a) 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 and
   space station power density levels to be compliant with those specified
   in paragraph (a) of this section.

   (d)(1) Except as provided in paragraph (d)(2) of this section, the
   applicant must provide, for each earth station antenna type, a series
   of radiation patterns measured on a production antenna. The
   measurements must be performed on a calibrated antenna range and, at a
   minimum, must be made at the bottom, middle, and top frequencies of
   each requested uplink band. The radiation patterns are:

   (i) Co-polarized patterns in the E- and H-planes for linear-polarized
   antennas or in two orthogonal planes for circularly-polarized antennas:

   (A) In the azimuth plane, plus and minus 10 degrees and plus and minus
   180 degrees from beam peak.

   (B) In the elevation plane, 0 to 30 degrees.

   (ii) Cross-polarization patterns in the E- and H-planes for
   linear-polarized antennas or in two orthogonal planes for
   circularly-polarized antennas, plus and minus 10 degrees from beam
   peak.

   (iii) Main beam gain.

   (2) For antennas more than 3 meters in diameter that will only be
   assembled on-site, on-site measurements may be submitted. If on-site
   data is to be submitted, the test frequencies and number of patterns
   should follow, where possible, the requirements in paragraph (d)(1) of
   this section for at least one frequency. Certification that the on-site
   testing has been satisfactorily performed must be included with the
   certification filed pursuant to § 25.133(b).

   (e) Protection of downlink reception from adjacent satellite
   interference is based on either the antenna performance specified in
   § 25.209 (a) and (b), or the actual receiving earth station antenna
   performance, if actual performance provides greater isolation from
   adjacent satellite interference. For purposes of ensuring the correct
   level of protection, the applicant must provide, for each earth station
   antenna type, antenna performance plots for the 18.3-18.8 GHz and
   19.7-20.2 GHz bands in the format prescribed in paragraph (d) of this
   section.

   (f) The holder of a blanket license pursuant to this section will be
   responsible for operation of any transceiver to receive service
   provided by that licensee or provided by another party with the blanket
   licensee's consent. Space station operators may not transmit
   communications to or from user transceivers in the United States in the
   18.3-18.8 GHz, 19.7-20.2 GHz, 28.35-28.6 GHz, or 29.25-30.0 GHz band
   unless such communications are authorized under an FCC earth station
   license.

   (g) A licensee applying for renewal of a license issued pursuant to
   this section must specify on FCC Form 312R the number of constructed
   earth stations.

   [ 65 FR 54169 , Sept. 7, 2000, as amended at  66 FR 63515 , Dec. 7, 2001;
    68 FR 16966 , Apr. 8, 2003;  69 FR 5710 , Feb. 6, 2004;  73 FR 70900 , Nov.
   24, 2008;  79 FR 8319 , Feb. 12, 2014]

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