Sec.  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  Sec.  Sec. 25.209(a) and (b),
   and/or the proposed power density levels are in excess of those specified in
    Sec. 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  Sec. 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]