Document ID: chunk:federal_register_of_legislation:F2021L00617:reg:162a:p93
Version: federal_register_of_legislation:F2021L00617
Segment Type: reg
Provision Reference: reg 162A (pt 93/144)
Character Range: 530447–533343

MHz band, especially those caused by second-harmonic radiation that would fall into the 4 990–5 000 MHz band allocated to the radio astronomy service worldwide.

    403 Subject to agreement obtained under No. 9.21, the band 2 520–2 535 MHz may also be used for the mobile–satellite (space-to-Earth), except aeronautical mobile–satellite, service for operation limited to within national boundaries. The provisions of No. 9.11A apply.     (WRC-07)

    404 Additional allocation:  in India and Iran (Islamic Republic of), the band 2 500–2 516.5 MHz may also be used for the radiodetermination–satellite service (space-to-Earth) for operation limited to within national boundaries, subject to agreement obtained under No. 9.21.

    407 In the band 2 500–2 520 MHz, the power flux-density at the surface of the Earth from space stations operating in the mobile–satellite (space-to-Earth) service shall not exceed −152 dB(W/m2/4 kHz) in Argentina, unless otherwise agreed by the administrations concerned.

    410 The band 2 500–2 690 MHz may be used for tropospheric scatter systems in Region 1, subject to agreement obtained under No. 9.21. No. 9.21 does not apply to tropospheric scatter links situated entirely outside Region 1. Administrations shall make all practicable efforts to avoid developing new tropospheric scatter systems in this band. When planning new tropospheric scatter radio-relay links in this band, all possible measures shall be taken to avoid directing the antennas of these links towards the geostationary-satellite orbit.     (WRC-12)

    412 Alternative allocation:  in Kyrgyzstan and Turkmenistan, the band 2 500–2 690 MHz is allocated to the fixed and mobile, except aeronautical mobile, services on a primary basis.     (WRC-12)

    413 In the design of systems in the broadcasting–satellite service in the bands between 2 500 MHz and 2 690 MHz, administrations are urged to take all necessary steps to protect the radio astronomy service in the band 2 690–2 700 MHz.

    414 The allocation of the frequency band 2 500–2 520 MHz to the mobile–satellite service (space-to-Earth) is subject to coordination under No. 9.11A.     (WRC-07)

    414A In Japan and India, the use of the bands 2 500–2 520 MHz and 2 520–2 535 MHz, under No. 403, by a satellite network in the mobile–satellite service (space-to-Earth) is limited to operation within national boundaries and subject to the application of No. 9.11A. The following pfd values shall be used as a threshold for coordination under No. 9.11A, for all conditions and for all methods of modulation, in an area of 1 000 km around the territory of the administration notifying the mobile–satellite service network:
     −136 dB(W/(m2·MHz))   for 0 ≤  ≤ 5
     −136 + 0.55 ( − 5)dB(W/(m2·MHz)) for 5 <  ≤ 25
     −125 dB(W/(m2·MHz))   for 25 <  ≤ 90
     where  is the angle of arrival of the incident wave