Document ID: chunk:federal_register_of_legislation:F2021L00617:reg:162a:p122
Version: federal_register_of_legislation:F2021L00617
Segment Type: reg
Provision Reference: reg 162A (pt 122/144)
Character Range: 609927–612848

should be at least 68 dBW and should not exceed 85 dBW.     (WRC-03)

    503 In the band 13.75–14 GHz, geostationary space stations in the space research service for which information for advance publication has been received by the Bureau prior to 31 January 1992 shall operate on an equal basis with stations in the fixed–satellite service; after that date, new geostationary space stations in the space research service will operate on a secondary basis. Until those geostationary space stations in the space research service for which information for advance publication has been received by the Bureau prior to 31 January 1992 cease to operate in this band:
         * in the band 13.77–13.78 GHz, the e.i.r.p. density of emissions from any Earth station in the fixed–satellite service operating with a space station in geostationary-satellite orbit shall not exceed:
            i)  4.7D + 28 dB(W/40 kHz), where D is the fixed–satellite service Earth station antenna diameter (m) for antenna diameters equal to or greater than 1.2 m and less than 4.5 m;
            ii)  49.2 + 20 log(D/4.5) dB(W/40 kHz), where D is the fixed–satellite service Earth station antenna diameter (m) for antenna diameters equal to or greater than 4.5 m and less than 31.9 m;
            iii)  66.2 dB(W/40 kHz) for any fixed–satellite service Earth station for antenna diameters (m) equal to or greater than 31.9 m;
            iv)  56.2 dB(W/4 kHz) for narrow-band (less than 40 kHz of necessary bandwidth) fixed satellite service Earth station emissions from any fixed–satellite service Earth station having an antenna diameter of 4.5 m or greater;
         * the e.i.r.p. density of emissions from any Earth station in the fixed–satellite service operating with a space station in non-geostationary-satellite orbit shall not exceed 51 dBW in the 6 MHz band from 13.772 to 13.778 GHz.

     Automatic power control may be used to increase the e.i.r.p. density in these frequency ranges to compensate for rain attenuation, to the extent that the power flux-density at the fixed–satellite service space station does not exceed the value resulting from use by an Earth station of an e.i.r.p. meeting the above limits in clear-sky conditions.     (WRC-03)

    504 The use of the band 14–14.3 GHz by the radionavigation service shall be such as to provide sufficient protection to space stations of the fixed–satellite service.

    504A In the band 14–14.5 GHz, aircraft Earth stations in the secondary aeronautical mobile–satellite service may also communicate with space stations in the fixed–satellite service. The provisions of Nos. 29, 30 and 31 apply.     (WRC-03)

    504B Aircraft Earth stations operating in the aeronautical mobile–satellite service in the frequency band 14–14.5 GHz shall comply with the provisions of Annex 1, Part C of Recommendation ITU‑R M.1643-0, with respect to any radio astronomy station performing