Document ID: chunk:federal_register_of_legislation:F2021L00617:reg:162a:p138
Version: federal_register_of_legislation:F2021L00617
Segment Type: reg
Provision Reference: reg 162A (pt 138/144)
Character Range: 655291–658153

in Recommendation ITU‑R RA.1631-0 and shall apply over the whole sky and for elevation angles higher than the minimum operating angle θmin of the radiotelescope (for which a default value of 5° should be adopted in the absence of notified information).
These values shall apply at any radio astronomy station that either:
         * was in operation prior to 5 July 2003 and has been notified to the Bureau before 4 January 2004; or
         * was notified before the date of receipt of the complete Appendix 4 information for coordination or notification, as appropriate, for the space station to which the limits apply.
     Other radio astronomy stations notified after these dates may seek an agreement with administrations that have authorised the space stations. In Region 2, Resolution 743 (WRC-03) shall apply. The limits in this footnote may be exceeded at the site of a radio astronomy station of any country whose administration so agreed.     (WRC-15)

    551I The power flux-density in the band 42.5–43.5 GHz produced by any geostationary space station in the fixed–satellite service (space-to-Earth), or the broadcasting–satellite service operating in the 42–42.5 GHz band, shall not exceed the following values at the site of any radio astronomy station:
         * −137 dB(W/m2) in 1 GHz and −153 dB(W/m2) in any 500 kHz of the 42.5–43.5 GHz band at the site of any radio astronomy station registered as a single-dish telescope; and
         * −116 dB(W/m2) in any 500 kHz of the 42.5–43.5 GHz band at the site of any radio astronomy station registered as a very long baseline interferometry station.
These values shall apply at the site of any radio astronomy station that either:
         * was in operation prior to 5 July 2003 and has been notified to the Bureau before 4 January 2004; or
         * was notified before the date of receipt of the complete Appendix 4 information for coordination or notification, as appropriate, for the space station to which the limits apply.
     Other radio astronomy stations notified after these dates may seek an agreement with administrations that have authorised the space stations. In Region 2, Resolution 743 (WRC-03) shall apply. The limits in this footnote may be exceeded at the site of a radio astronomy station of any country whose administration so agreed.     (WRC-07)

    552 The allocation of the spectrum for the fixed–satellite service in the bands 42.5–43.5 GHz and 47.2–50.2 GHz for Earth-to-space transmission is greater than that in the band 37.5–39.5 GHz for space-to-Earth transmission in order to accommodate feeder links to broadcasting satellites. Administrations are urged to take all practicable steps to reserve the band 47.2–49.2 GHz for feeder links for the broadcasting–satellite service operating in the band 40.5–42.5 GHz.

    552A The allocation to the fixed service