Goto Section: 25.209 | 25.211 | Table of Contents
Revised as of October 20, 2020
Goto Year:2020 |
§ 25.210 Technical requirements for space stations.
(c) Space station antennas operating in the Direct Broadcast Satellite
Service or operating in the Fixed-Satellite Service for reception of
feeder links for Direct Broadcast Satellite Service must be designed to
provide a cross-polarization isolation such that the ratio of the
on-axis co-polar gain to the cross-polar gain of the antenna in the
assigned frequency band is at least 27 dB within the primary coverage
(f) All space stations in the Fixed-Satellite Service operating in any
portion of the 3600-4200 MHz, 5091-5250 MHz, 5850-7025 MHz, 10.7-12.7
GHz, 12.75-13.25 GHz, 13.75-14.5 GHz, 15.43-15.63 GHz, 18.3-20.2 GHz,
24.75-25.25 GHz, or 27.5-30.0 GHz bands, including feeder links for
other space services, and in the Broadcasting-Satellite Service in the
17.3-17.8 GHz band (space-to-Earth), shall employ state-of-the-art full
frequency reuse, either through the use of orthogonal polarizations
within the same beam and/or the use of spatially independent beams.
This requirement does not apply to telemetry, tracking, and command
(i) 17/24 GHz BSS space station antennas transmitting in the 17.3-17.8
GHz band must be designed to provide a cross-polarization isolation
such that the ratio of the on axis co-polar gain to the cross-polar
gain of the antenna in the assigned frequency band is at least 25 dB
within its primary coverage area.
(j) Space stations operated in the geostationary satellite orbit must
be maintained within 0.05Â° of their assigned orbital longitude in the
east/west direction, unless specifically authorized by the Commission
to operate with a different longitudinal tolerance, and except as
provided in Section 25.283(b) (End-of-life Disposal).
[ 58 FR 13420 , Mar. 11, 1993, as amended at 61 FR 9952 , Mar. 12, 1996;
62 FR 5931 , Feb. 10, 1997; 62 FR 61457 , Nov. 18, 1997; 68 FR 51508 ,
Aug. 27, 2003; 69 FR 54587 , Sept. 9, 2004; 70 FR 32256 , June 2, 2005;
72 FR 50029 , Aug. 29, 2007; 78 FR 8428 , Feb. 6, 2013; 79 FR 8323 , Feb.
12, 2014; 81 FR 55338 , Aug. 18, 2016; 83 FR 34491 , July 20, 2018]
Goto Section: 25.209 | 25.211
Goto Year: 2020 |
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