§  25.138   Blanket Licensing provisions of 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) All applications for a blanket earth station license 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 meet the following requirements shall 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 ±3°
   of the GSO arc, under clear sky conditions:
   18.5-25log(θ)-10log(N) dBW/40kHz for 2.0° ≤ θ ≤ 7°
   −2.63-10log(N)         dBW/40kHz for 7° ≤ θ ≤ 9.23°
   21.5-25log(θ)-10log(N) dBW/40kHz for 9.23° ≤ θ ≤ 48°
   −10.5-10log(N)         dBW/40kHz for 48° < θ ≤ 180°

   Where:

   θ is the angle in degrees from the axis of the main lobe; for systems
   where more than one earth station is expected to transmit
   simultaneously in the same bandwidth, e.g., CDMA systems,

   N is the likely maximum number of simultaneously transmitting
   co-frequency earth stations in the receive beam of the satellite; N=1
   for TDMA and FDMA systems.

   (2) GSO FSS 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:
   21.5-25log(θ)-10log(N) dBW/40kHz for 3.5° ≤ θ ≤ 7°
   0.37-10log(N)          dBW/40kHz for 7° < θ ≤ 9.23°
   24.5-25log(θ)-10log(N) dBW/40kHz for 9.23° < θ ≤ 48°
   −7.5-10log(N)          dBW/40kHz for 48° < θ ≤ 180°

   Where:

   θ: is the angle in degrees from the axis of the main lobe; for systems
   where more than one earth station is expected to transmit
   simultaneously in the same bandwidth, e.g., CDMA systems.

   N: is the likely maximum number of simultaneously transmitting
   co-frequency earth stations in the receive beam of the satellite; N=1
   for TDMA and FDMA systems.

   (3) The values given in paragraphs (a) (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) 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(θ)-10log(N) dBW/40 kHz For 2.0° < θ ≤ 7.0°
   −12.63-10log(N)       dBW/40 kHz For 7.0° < θ ≤ 9.23°

   where θ is the angle in degrees from the axis of the main lobe. For
   systems where more than one earth station is expected to transmit
   simultaneously in the same bandwidth, e.g. , CDMA systems, N is the
   likely maximum number of simultaneously transmitting co-frequency earth
   stations in the receive beam of the satellite. N=1 for TDMA and FDMA
   systems.

   (5) For earth stations employing uplink power control, the values in
   paragraphs (a) (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.

   (6) Power flux-density (PFD) at the Earth's surface produced by
   emissions from a space station for all conditions, including clear sky,
   and for all methods of modulation shall not exceed a level of −118
   dBW/m2 /MHz, in addition to the limits specified in §  25.208 (d).

   (b) Each applicant for earth station license(s) that proposes levels in
   excess of those defined in paragraph (a) of this section shall 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. Applicants shall also 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. Applicants shall
   certify that all potentially affected parties (i.e., those GSO FSS
   satellite networks that are 2, 4, and 6 degrees apart) acknowledge and
   do not object to the use of the applicant's higher power densities.

   (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) The applicant shall provide for each earth station antenna type, a
   series of radiation patterns measured on a production antenna performed
   on a calibrated antenna range and, as a minimum, shall be made at the
   bottom, middle, and top frequencies of the 30 GHz band. The radiation
   patterns are:

   (1) Co-polarized patterns for each of two orthogonal senses of
   polarizations in two orthogonal planes of the antenna.

   (i) In the azimuth plane, plus and minus 10 degrees and plus and minus
   180 degrees.

   (ii) In the elevation plane, zero to 30 degrees.

   (2) Cross-polarization patterns in the E- and H-planes, plus and minus
   10 degrees.

   (3) Main beam gain.

   (e) Protection of receive earth stations 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 insuring the correct
   level of protection, the applicant shall provide, for each earth
   station antenna type, the antenna performance plots for the 20 GHz
   band, including the format specified in paragraph (d) of this section.

   (f) The earth station licensee shall not transmit towards a GSO FSS
   satellite unless it has prior authorization from the satellite operator
   or a space segment vendor authorized by the satellite operator. The
   specific transmission shall be conducted in accordance with the
   operating protocol specified by the satellite operator. The holder of
   an FCC blanket license pursuant to this section shall be responsible
   for operation of any transceiver to receive GSO FSS service provided by
   that licensee or provided by another party with the blanket licensee's
   consent. Operators of GSO FSS systems shall not transmit communications
   to or from user transceivers in the United States unless such
   communications are authorized under a service contract with the holder
   of a pertinent FCC blanket license or under a service contract with
   another party with authority for such transceiver operation delegated
   by such a blanket licensee.

   (g) A licensee applying to renew its license must include on FCC Form
   405 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]

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